I like the format . As always you have to build it 3 times getting it as you want. 2th you lose error's. 3th you will ditch all useless weight on stuff you do not need. just keep the spanners moving mate.
I wish I had more advice to give on the helicopter, but since I know nothing about them except that it's immensely satisfying to watch your progress, I'll just say how thrilled I was to see your power hacksaw. I have one sitting in storage awaiting a thorough restoration. Keep up the excellent work!
@@NoelBarlau You always write very nice comments! Power hacksaws are great, they suit hobbyists because they take up a little less room than bandsaws and can cut accurately. The speed is slow compared to a bandsaw but that doesn't really bother me as I just set it going and do something else. The power hacksaw I have is actually an Elliot 10m metal shaper. I made the hacksaw attachment to be able to use it as such and I swapped the auto feed to the up and down slideway. I use the shaper to broach internal keyways to any size, so the tool has two uses for me but it can of course be used as a shaper. I just haven't needed that use yet. Have a good new year !
I really like the format like this, it makes you feel part of the discussion. Even though I agree it is weird to talk to a camera, alone in your shed ;)
RUclips just recommended your channel and I've been picking through the older vids. I've been a machinist 38 yrs and this is right up my alley. Good stuff. By the way, in case you haven't been informed, there's a grocery store chain in the southern US named Winn Dixie. Just though you should know! LOL
I enjoy your camera work, tripods are your friend, as for your project, there will be some small change that will take it from small hops to buzzing around the field or neighborhood. Good luck, looking forward to the new year.
@@phlodel yes, thats right. I had Audi A4 tripod cv's on there previously. The trouble is they have to run at more than twice the normal operating rpm for which they were designed. The boots can't take that rpm and I think lubrication could be a problem. The ones I used were quite heavy and I think quad bikes have smaller/ lighter cv's that could have a better chance. Universal joints were the plan as that's what's used on vehicle prop shafts, they run at engine rpm in top gear, but I didn't realise about the dissimilar angles vibration problem. The rubber couplings are constant velocity joints so that's the reason they were suggested. They also allow a soft drive and are lightweight.
Keep up the good work Ben. I enjoy watching your progress & unique style. I am happy to recommend a full bridge regulator rectifier to allow you to use the internal flywheel mounted permanent alternator to drive your scimatar continuos rated brushless cooling fan. This would allow removing your additional permanent magnet alternator, both weight reduction and engine torque increase.
@@donaldpayne1376 Thank you! The stator using the magnets in the flywheel I think is rated at 5 Amps, the electric fan I've got is 16amps. Does that mean it's not possible to use the stator and flywheel or is there a way to increase the output ? My plan is to go to a belt driven fan, ditch the external alternator and use the stator already on the engine to power the water pump and gauges. I don't think an electric fan is going to do the job I need it to. Was hoping it would do but during the brief last trials with this setup it didn't look promising. Sufficiently cooling the engine is a problem but I thought I would tackle that once it's back operational again, it sounds like you have the expertise to advise. 👍
@Ben-Dixey you're right 5 amps will never make 16. Although re winding the internal alternator and adding windings will increase output. 3 phase is ideal. Good idea to make cooling mechanical. Yes it'll easily drive your pump and gauges. Although I'd make sure to use a full bridge reg rectifier as many early outboard use a half wave with no regulation. Single phase Often 2 yellow wires, a red + and black earth. 3 phase has 3 yellows.
@Ben-Dixey sounds like it's already 3 phase. To test max output in case reg rectifier is inefficient, Two test options Safe option 1 If you have access to an old Lucas alternator 17 or 18 acr with black plastic back cover say a mk 4 cortina or similar. I use the rectifier, hook up the 3 [ yellow] phases to the original stator connections. Earth to the mounting stud. Positive to the large blade terminal Hook up to a car battery with an ammeter in series. Test 2, 1 second duration only. Connect one stator leg to battery negative Connect another stator leg to a 12v battery positive via an ammeter and connect for 1 second max. Ammeter will indicate max current. So this for all stator combinations. 1 second max test duration.
@ Thanks for this technical advice, I am under the impression the stator on my engine is faulty. It was a while ago now I looked into it but I think I measured the 3 phase output voltage and thought it was too low. I take it there is no harm trying to test the output of the stator even if it turns out to be faulty ? I've never had any power from this stator since I bought the engine and haven't tried anything to fix it. All I've done is measure some voltages. Was I correct to measure ac voltage to determine if the stator is faulty ? I can't remember what the voltage was, I mentioned the voltage in a video, will see if I can find it.
We're here listening Ben! Another good video. While I see the advantage of another reduction - that has to be balanced against the additional potential failure points. I would keep the mechanical complexity to a minumum and try saving weight elsewhere.
Hey Brother Ben , Great to seeing you involved in developing new ways or improving older ways ...best use of the time...we really appreciate and enjoy it when you try experimenting , testing, analysing...for me most interesting part of any project. oh yeah you look good talking to us towards camera, actually its more normal way to address the video or viewers on youtube . Thanks a lot , I was wondering only three days ago what you might be upto , full use of time . I will watch your full video on Laptop. Cheers
@@rajeevshagun7409 It's so nice most people seem to prefer the talking to the camera rather than scripted narration. I'll do more that way in future and hopefully I will get more natural at it with practise. It's certainly a lot less work to make a video that way which might mean I can produce more videos. In everyday life I'm a quiet person and don't have a lot to say so talking to a camera is far out of normality for me. It's good though as it's a new skill to develop as was the narration. Were you made to read in front of the class at school ? I was and it was a horrid experience as i was so bad at it. Hope you have a good new year and thanks for the support. 👍
@Ben-Dixey brother reading front of the class ,i didn't like it either but letting my friend and viewers is interesting to me , I like to explain about things to people if I have something especial to tell . I think you have something especial to tell us , it's very good you explain us in that way , it's like you talking to me or us directly. Full support to you and your project brother Ben.
What if you make that top part fixed. And to steer you just move your seat around to control it? Like a hang glider bar, or would that not be enough control?
@@DktheWelder I think it could possibly work, an acquaintance of mine was developing a weight shift helicopter but he keeps his cards close to his chest. Haven't been able to find out much about his experiments. If it would work then it would be the Simplest helicopter control there is.
😆👍, the super Tigre engine was a result of full speed straight down onto the tarmac. I lost radio control 3/4 of the way through a loop. It closed the road in both directions while we cleared up the mess. very embarrassing and I never went back to that flying club. 😆
G'day Ben, Yay Team ! Naaah mate, you're not "weird" the local unfenced wild Kangaroos & Wallabies don't even scratch at your door, wanting to share your breakfast, half an hour before every Sunrise... Building a Helicopter in the back Shed, well, not a lot of DIY Tinkerers can say that they have levitated anything like as far, or for as long - as you've done...; so, on the Scale of Eccentricity, You'll have to admit to being At least Noticeably Cam-shaped - Kinda thing...(!). I like your reasoning with the Rubber Doughnuts, maybe try the Mix-'n.-Match strategy with a flexible Coupler at one end and a metallic Uni.-Joint at the other..., to have at least 2 Datapoints from which to extrapolate how much extra stiffness two Doughnuts might involve ? The Metalwork was delightful to watch..., I wish my father hadn't hoarded his skills the way he did - I think he hoped to push me into going to do something at University which would "save me" from having to make a living by being good at making & fixing stuff - but I was taken to visit Sydney Uni. at age 3, and the grandfather trying to motivate me to want to attend..., succeeded in tripping over on the steps as we were peeking in through the door at a Lecture, interrupting proceedings, and having to apologise profusely as we beat a hasty retreat. Which Imprinted me with the concept that a University is a place where clever people go to humiliate themselves... So my metalworking skills are crap, and I never even applied to go to Uni...(!). However, I reckon my father would like the Solar-Electric Chook-Chaser..., which, for whatever it's worth, has a Reduction-Train of 3 Gears in a diagonal line (bottom Cog submerged in Oil, # 2 half submerged, # 3 lubricated by Splash, and then a Jack-Shaft across to the other side of the Bike, turning the Drive Sprocket for the 4.4 : 1 Chain drive to the back Wheel..., the Ratio between the Motor & Wheel is 8.34 : 1 - so they've used 3 Gears to achieve about 2 : 1 primary Reduction... Presumably they had their reasons for adding the "extra Step" in the Gearbox... I suspect that splitting your Primary Reduction into 2 stages, as you outlined, will be tricky to achieve, but very well worth doing... Especially if you add more Triangulation into the Airframe Girder. I've refined my Formula to calculate the cost of installing enough of a stand-alone Solar Electric Equipment to be able to recharge an Electric Car, after dark when arriving home - with the Solar Batteries being recharged and floating by 11:00 Local Apparent Time the next (Blue-Sky) day... The rig to feed the Sting's 2.3 Kw/Hr Battery cost $10,049, which is $4,369 per Kw/Hr... Rounding up, to have a conservative Cost Estimate, that's $4,400 per KW/Hr..., and 10% of that was Federal Goods & Services Tax... So, a "neat" $4,000 - in Oz dollars ; and the Exchange Rate varies daily with each Nation's Foreign-Exchange Gambling "Industry". I'm at 30° South, so, to correct for your Lattitude, you will probably need to add more Panels - perhaps double the Array (?)...; but the Panels are the cheapest part of the Installation....(2 x 40-Volt, 440 Watt Panels, @ $385 each..., or 7.5% of the job...!). A couple of weeks ago the figures were less refined, but I posted a Video using what I had at the time "80 Years' Renewably-Powered Road-Vehicles, In Glen Innes ; Practical Realities...!" Commencing at the local Museum, to consider my father's Charcoal-Gas Producer, which he made in 1943, and used to fuel his car in 1944 & '45 to take the family to the Coast (150 miles each way) for a holiday...(!). Then, addressing my Chest Camera, I ride home (18-km) on the Solar-Electric Chook-Chaser which was bought with a big chunk of what I finally saw of Dad's Estate... And, squeaking of alleged "Weirdness", for a bit if a sombering sort of a Giggle, you could always try, "Prissydunce Musk, Driving The Trumpocalypse...; Rideabout/Talkabout, X-mas Video...!" 53 Km, 43 Km/Hr average speed, 57 Km/Hr maximum recorded (?!), 33% Battery Capacity remaining on return ; and it took 2:30 to recharge the Bike, and then 2 Kw/Hrs into the Gel-Cells to "Float" them the next day. 2-ton Electric Cars at 100 Km/Hr are never going to be any kind of an Emissions-free Thing...; because a 40 Kw/Hr Battery needs $200,000 worth of Stand-Alone Solar System to recharge it - and running on Gridpower any EV is powered by a Remote Combustion Engine. Which is a bit of a problem, Particularly for young Elon, and all his his Marketing Jism...(!). Anyway, Happy Solstice Festival ! Keep on keeping on... Stay safe. ;-p Ciao !
@@WarblesOnALot Nope, I've never had a kangaroo wanting to share my breakfast! 😀 you win that one! I'm probably going to do as you suggest and go for the universal at the top and rubber doughnut at the bottom. If a problem with vibration develops then I will resort to rubber top and bottom. It's nice to hear you liked the metal work, I enjoy it and it's a shame your father didn't pass on more to you. You're a clever guy but that can be applied mechanically or on paper, in the perfect world I would say both is the best. I know a few people that are brilliant engineers on paper but they lack mechanical experience. They can make really bad decisions just through lack of hands on experience. What's a chook chaser? Not heard that expression. Charcoal gas producer to run a vehicle ? Have a good new year ! Ben
@Ben-Dixey Thanks ! There's literally no better way to greet the day, than when the Eastern Horizon is glowing Pearly-white, and one of the Hoppities gets up on the Deck to scratch on the door of my Hut...; and then they stand in a little semi-circle while I put Bread in their mouths..., there's a couple of (short) clips of that - one with Swamp Wallabies & the other with Grey Kangaroos, in my recent uploads. Or in the Playlists there are probably a thousand uploads of similar interactions, posted since 2011...; I've been living up here since 1991, and they treat me as being their Family's pet Tame-Human... I get the feeling that sometimes one can pick which items were designed by Academically-trained Engineers versus things built by people who'd spent a dozen years disassembling, tinkering, reassembling, pondering, sketching, and beavering away in the Toolshed trying to make something which works better, and/or breaks less often, than the bought-one...; before their Parents realise that they failed to make the cut for Vet.-Science or Medicine, so they push their pimply Offspring (with the two Left Hands) into Engineering - where they Ace the Paperwork and then get paid to design a series of unmaintainable Nightmares (thus achieving accidentally imbued Planned Obsolescence !). It's kinda weird that Dad's father was a Wheelwright/Woodsman cum Coachbuilder/Blacksmith, his father was a Preacher before becoming a Teacher - but he was a Wheelwright before going into the (Wesleyan) Church..., and Dad morphed from Coachbuilder via Auto-Electrics to become an Engine-Reconditioner (with his own Offset-Chuck Crankshaft-Grinder in 1948 - the only one for 250 miles in any direction !)...; I started carving Propellers at 13, in High-School..., trained as a Registered General Nurse but retired (with a Bad Back) at 25, & began using my grandfather's Wheelwrighting Toolkit (which I had somehow inherited, piecemeal...) to commence trying to carve an Electric Windmill which would be as good as a Solar Panel... And, then, my son was apprenticed as an Auto-Electrician under the apprentice of the apprentice of my father's last Business-Partner (back in 1958), and when he turned 25 his Boss sold him the Auto-Electrical business - and thus he received the Electrical Test-Bench which my father had built in 1928 - and with which Willi Struve had started his Workshop in 1960 (back when I was a Foetus...) ! Nature & Nurture, plus Olde-Local Effect, which is a thing which Migrant types never ever do "get" - let alone benefit therefrom...; apparently. My brother, 20 years older - from a different mother, who grew up in the Blacksmith & Engine Reconditioning Workshop..., he went into the Postmaster Generals' Department as a Telephone Line-Technician, and then to Ericson, where he retired as Manager for Installations for the Southern Hemisphere - having put the "Crossbar STD Exchanges" into Venezuela, Malaysia, Fiji & Saudi-Arabia..., before retiring... But I was deeply into Aeroplanes & Dad hated flying...; so therefore my first Aeroplane hangs in the National Transportation Museum, because I was doing the Autodidactic thing for my Adolescent Rebellion, more or less. I like to think that I did a better job raising my son to "fit in" to Society as an Eccentric, than my father did with me...; Matthew was, at 17, the youngest Deputy Captain to be elected to Office in the NSW Rural Fire Service - and these days he's literally as qualified as a Volunteer can become, at 35 he's been a Group Officer for 5 years, and on Breakout-Days, he's the Local Yokel whom the (salaried) White-Shirts from Sydney appoint to be the Acting Divisional-Commander when they have no idea about what to do with the Fireground... I had him wearing a 2-Litre Backpack, helping me put in our first Night Hazard-Reduction Burn in this Forest in 1994, when he was 5...; so he literally "thinks that's all within the 'Normal Range'.." ! Back in the 1960s, Honda began selling little "Step-Through" Motor-Scooters, with 50cc 2-Strokes engines which were apparently marketed at aspirational Motorists in 3rd-World Nations..., and here in Oz the Post-Office bought them by the thousands, to replace suburban Mail Delivery via Bicycle...; and when they'd been in use for several years they began to be sold off to make way for newer models, making their way onto the Market where lots of families in Rural Towns & On Farms bought the 2nd-hand Postman's Step-Through Motor-Scooters for their Teenagers to play with, before & after School, on the weekends, going round & round the backyard or adjoining paddock.... Chasing their father's domestic Chickens, or those of their neighbour, was pretty high on the list of things which Kids like to do with a Step-Through... So...., colloquially squeaking, a "Chook-Chaser" is Any little lightweight Motor-Scooter which can outrun and scatter a frightened Flock of domestic Fowls..., but only Barely... Later on, when "Trail-Bikes" and Motocross were invented, the Children's /Tweenage & Teenage Market was catered to by increasingly tiny weeny miniaturized versions of Trials Bikes - all the little ones of which seem to have collected the "Chook-Chaser" label. Last time I was in the local Motorbike Shop they had a little 2-Stroke Trail-Bike, literally Knee-high, (10cc ?) and with Bicycle-type "Training-Wheels" poking out to stop the 3 year-olds from falling down & crying...! So. Yeah...; 3,000 Watts, 4 Hp max. continuous Power..., looks exactly like a Trail-Bike - all the Bells & Whistles, fully Street Legal - but "Homologated" via Software to only 45 Km/Hr... It's pretty much the definition of a Street-Legal Electric Chook-Chaser...(!). I've logged 3,018 Km on the thing at this stage, slightly over 75 hours, this last thousand Kicks done all on Solar Current ; it might be slow, but every time I ride it I feel delightfully smug to be going somewhere - without burning Petrol...! In the same way that Wood can be Pyrolised into Charcoal - and after Water-Vapour the Wood produces and outgasses Methane & Carbon Monoxide, both of which burn - plus Carbon Dioxide & Terpines, and LOTS of Creosote & Tar & toxic crap...; and the Gas can be collected, filtered, scrubbed and used to burn as Fuel... Apparently the amount of cleaning, scrubbing, and filtering can be greatly reduced if one first makes Charcoal from the Wood, & then designs the Gas-Producer accordingly, and runs it on pure Charcoal... To see the one which my father made - with my best reconstructed recollection of how it was said to have operated...(!), backtrack me to my Uploads...; I rode in to the Museum to start the video there, and after maybe 5 minutes of Introduction/Orientation walkabout in the Grounds, perusing old Steam Engines (including one restored by my father) there's about 10 minutes devoted to the Charcoal Producer(s). They have two of them on display, with Dad's being the larger & more complicated...; they were mounted on a Platform or Shelf attached to the Rear Bumber-Bar. The Firebox/Charcoal Hopper and part of the Gas-Filtering Setup was Water-cooled....; so a Steam Explosion was one available possibility... The Gas it produced was hot, poisonous, colourless, odourless and Explosive...; carried underneath the floor in a thin-walled Sheetmetal Pipe running to the Engine - where any sharp rock thrown up from the dirt roads by the wheels..., might be able to puncture it... But, considering that the Sting & it's Solar Setup was all bought with money from Dad's Estate (which took 42 years of Paperwork to reach my Bank Account...!) ; I figured that Dad's Charcoal-Producer and my Solar-powered Motorbike should probably be introduced to each other, and the Bike has now been taught to carry the Walking-Stick which I inherited from my grandfather, in 1963...(!), so it too came along for the ride... If I had more spare money, I'd probably illegally rebuild my second Aeroplane using Electric Motorbike Power, to prepare to stand in as the Silent Ultralight-Motorglider version of the Gyro-Kapitan in the Mad-Max 2 Movie... Take off, then thermal up to 10,000 ft with the Blade-Brake stopping the Propeller ; and when it gets cold, come back down at 50 mph/500 ft/min in Stage-4 Regenerative-Braking, operating as a 450-pound Free-Flying Electric Wind-Turbine.... That really would be fun...! But - I'm using the funds to buy 2 Air-Conditioners, 660 Watts each, to render my Hut & Toyshed (10 by 12 foot Lawn Lockers - both thermally insulated...) actually habitable when the next intense Heatwave shows up, and the next one..., ad infinitum for a while - at least. Each one pumps 2.4 Kw worth of Heat out of the Enclosure, so hopefully I can run both on 1/3 power to cool both places ; on what the Solar Panels produce in daylight (?), so that my daughter car retreat into the Cool without having to share a Lawn Locker - kinda thing. The Heatwaves are getting hotter as time goes on - so one has to do SOMETHING with the resources remaining....(!). When it's over 40° in the shade, then a Hammock under a Tree simply doesn't work well enough, and last week it was 47° at Wilcannia... And, yet, The Greens are lucky to poll 8% , 12% at best, here in Oz...: where the ruling Sheeples are determined to Grow their EcoGnomie By using ever more Fossil-fuelled Industry, Transport, & Processes. At least this hundred-acre Endangered Species Sanctuary seems to be a good vantage-point, from which to observe (the antics of the rest of the 8 Billion !). Such is life, Live a good one... Stay safe, ;-p Ciao !
@@julianmills9954 👍 I need to watch that film again, it would mean much more now! As you say Julian weight is king. It's amazing how much weight you can lose out of parts by a redesign or change in material. I also used to think just because I chose aluminium as a material it's bound to be lighter than steel. Not so in some cases, all things need to be considered. Have a good new year 👍
Awesome project. I hadn't seen any of your previous videos, but this popped up and I had to click thinking that somebody is putting a turboprop in their homemade helicopter. Just slightly disapointed.
ruclips.net/video/fRp2uAYWa_A/видео.html Certa 1993 - I also designed the Jet Exec turbine conversion Don Hillberg ruclips.net/video/Qa0QAp6yeZc/видео.html Oshkosh 1995
@ Coaxial or single rotor? Gray zhu on RUclips built a twin mz202 engined single rotor, two place machine. We message quite often. Think I've seen a two place coaxial too, can't remember what the power plant was.
The helicopter that I inherited in the late 90's I believe had a chain coupler for one of those connections and a nearly heavy duty designed polymer coupler also....I may be mixing that up but I have seen those work in those applications.--John
The rubber driveshaft coupler, doesn't that require metal shim plates for the flex? Just the rubber will pull it's self apart? The metal shims help hold the rubber together & allow flex?
Hi Ben, good vid........if you had a gear down coming of the engine the shaft is going to be way out of center to where it should be, and this extendable universal drive shaft I don't think anyone's used it on any machine and flown ?
@@cloudusterable Hi Peter, thanks and yes the drive would change the position of the shaft unless I moved the engine back. Doing that causes balance issues to sort out. I haven't seen any driveshaft like I've designed, wonder if it will work? Have a good new year and I hope you are still tinkering.
Brain dump talk is always good as it shows what constraints you are weighing up, Ben. I'm a little disappointed that the Glid Doman / Dave Jackson CV coupling didn't get any consideration. A variation of the design, replacing the inner shaft with a ring, would give you a ring CV design. This means you could nest two CV couplings concentric to each other. This means you could do counterrotation with one CV inside the other CV. This means you could put the 2 concentric CVs above the drivetrain. This means that the drivetrain doesn't have any real angle or slip to consider. This means that you can keep the drivetrain simple and light. It also allows space in the centre to fit a collective control cable and actuator. The downside is a lot of machining, and you could struggle to fit the ring on the lathe. You might need to get those later cut. But surely worth thinking about?
@@martingarrish4082 Hi Martin, sorry to disappoint, the reason I'm yet to really consider the option is I haven't fully grasped it. Sorry for being dumb I know you have given me the information already.
@@Ben-Dixey , no worries. I thought that might be the case. I'll see if I can sketch something out or swing by at some point for one of my technical arm waving sessions. 😁
@@martingarrish4082 Perhaps a few direct questions will get it into my head Martin? if you would be so kind. Cvt (constant velocity tranmission ) ? Replacing the inner shaft with a ring ? I don't understand. Do you mean drive the inner shaft via a ring ? How is this different to the air scooter, other than you can feed collective controls through the centre of the drive ? The reason I didn't copy the airscooter is because I thought I could do the rotor reversing using the same belts used for the drive. A potentially lighter design. If you would rather explain in a different way, no worries. Thanks
@@Ben-Dixey , sure. "Cvt (constant velocity tranmission ) ? " That was a typo - I meant CV (constant velocity coupling) and have edited the post. "Replacing the inner shaft with a ring ? I don't understand. Do you mean drive the inner shaft via a ring ?" For the outer CV coupling I mean no solid shaft at all. Instead use a ring, or short hollow tube, to transfer torque from the upper belt pulley. The lower belt pulley could drive a shaft, or it too could drive a ring or short hollow tube. This would put both CV couplings on the same plane with one concentrically inside the other. The concentric Doman / Jackson couplings allow the coaxial rotor head to tilt. "How is this different to the air scooter, other than you can feed collective controls through the centre of the drive ?" Couldn't find details of rotor head as Wayback machine offline. From video I found it looks like that is similar to what I am suggesting, but they are using a gearbox at the base of the rotor with single CV coupling drive. What I'm suggesting is keep the belt coaxial drive, but fixed to the airframe not the rotor head. Then connect the two belt pulleys to the coaxial shafts via 2 coaxial CV couplings. One CV coupling sitting concentrically inside the other - this is why you need to drive the outer CV coupling with a tube or ring rather than a solid shaft. It only works with a Doman / Jackson coupling.
@@martingarrish4082 Ok thanks for explaining, I believe I understand the concept. Keep the reversing via belts and keep the drive fixed but articulate the rotor shafts via concentric cv joints. Is that correct? The bottom rotor would have to be raised to clear the drive frame as it would no longer clear during aft cyclic. That would also mean the top rotor would have to be raised too. Not a major problem just a consideration. Have you seen a coaxial cv joint anywhere before ?
As ever, an excellent video Ben and amazing engineering wayyy beyond my peabrain comprehension!! Hope you had a good Xmas and here's to 2025 for you pal! PS - Talking to yourself and forgetting you are recording it pal works well. I should know!! ;-)
@@SystemsPlanet Hi, it would result in a potentially faster build depending on part lead times, I have some friends with a top notch cnc machine shop and I would 100% trust them to do a fantastic job on any parts I needed. The problem is it's currently cost prohibitive, maybe one day it will be an option and I could spend more time thinking about other flying machines I would like to build. Thanks for your continued support and have a happy new year!
@@SunilSundar yes. Had problems with a similar joint, the main one being cv boots can't take the rpm. Rubber couplings if they can be used are constant velocity joints.
Why not rigidly couple the motor with the rotor, doing away with flexible couplings. Then just an allow the motor to move with respect to the frame. Talking to the camera was just fine. It was only strange in your head!!
@@timcorso6337 it's been suggested before but could work. In the previous video I talked about the configuration with the engine attached to the gimbal. The only downside is the higher vertical position of the CG, not necessarily a problem in flight but it would make a dynamic roll over more likely. It could still be something to consider, it would make the machine more weight shift with the extra weight to resist moving. Yeah, you're right, it's in my head! Hopefully will get more natural with practice.
@@zenzen9131 I have to disappoint and say I'm not ex-RAF, it would certainly be nice to be able to say that and nice to be compared but no. I did a mechanical engineering apprenticeship from school and worked for a few engineering businesses. Can I ask what you did in the RAF ?
We are gonna ser you in the news twice. Once when you fly it and once when it either flys apart or crashes, then flys apart. Looks like an awfully flimsy frame. Im not an engineer but have done a lot of it in my 61 years. Good luck and please be careful
@@robertdinicola9225 The frame is flimsy, particularly at the moment because some bolts are loose and bracing is removed. I don't mind a little flex as it cushions the terrible uneven running of a 2 stroke engine which reduces the stress on the drive components, but too much flex must be avoided as you suggest.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Talking to the camera is fine. It's nice to see your face and to see you explaining your engineering in front of your craft in person.
I just love❤ the progress and the exploring of ideas.. Can't wait to see it work..
Good work done sir
This is a good format, nice to have a face instead of a voice and see you pointing on stuff that i dont understand.
I loved seeing you in front of the camera, makes me feel like I'm in the conversation with you. Great new format. Kindly Ryn
@@RetroRyn That's very nice to hear. Thank you 😊
I like the format .
As always you have to build it 3 times getting it as you want.
2th you lose error's.
3th you will ditch all useless weight on stuff you do not need.
just keep the spanners moving mate.
I wish I had more advice to give on the helicopter, but since I know nothing about them except that it's immensely satisfying to watch your progress, I'll just say how thrilled I was to see your power hacksaw. I have one sitting in storage awaiting a thorough restoration. Keep up the excellent work!
@@NoelBarlau You always write very nice comments!
Power hacksaws are great, they suit hobbyists because they take up a little less room than bandsaws and can cut accurately. The speed is slow compared to a bandsaw but that doesn't really bother me as I just set it going and do something else.
The power hacksaw I have is actually an Elliot 10m metal shaper. I made the hacksaw attachment to be able to use it as such and I swapped the auto feed to the up and down slideway.
I use the shaper to broach internal keyways to any size, so the tool has two uses for me but it can of course be used as a shaper. I just haven't needed that use yet.
Have a good new year !
I really like the format like this, it makes you feel part of the discussion. Even though I agree it is weird to talk to a camera, alone in your shed ;)
Top notch. New format is great, you're a real charmer haha.
@@milolouis cheers 😀
RUclips just recommended your channel and I've been picking through the older vids. I've been a machinist 38 yrs and this is right up my alley. Good stuff. By the way, in case you haven't been informed, there's a grocery store chain in the southern US named Winn Dixie. Just though you should know! LOL
@@kcraig51 I'm glad you find it of interest and no I didn't know about the grocery stores. 😆👍
I like it, you explain very clearly. Thanks
Well done Ben, nice video, and I liked the format. I still can't believe you have already gotten off the ground, amazing achievement, well done.
I enjoy your camera work, tripods are your friend, as for your project, there will be some small change that will take it from small hops to buzzing around the field or neighborhood. Good luck, looking forward to the new year.
Wow fantastic video.
@@DanielRowe Thank you 😊
Thank you for the video 👍😊
@@TheLincolnshireFlyerMy pleasure, thanks for watching 😊
Ben, however you chose to explain your thinking it's just fine. 🙂
Isn't this what CV joints are for?
@@phlodel yes, thats right. I had Audi A4 tripod cv's on there previously. The trouble is they have to run at more than twice the normal operating rpm for which they were designed. The boots can't take that rpm and I think lubrication could be a problem. The ones I used were quite heavy and I think quad bikes have smaller/ lighter cv's that could have a better chance.
Universal joints were the plan as that's what's used on vehicle prop shafts, they run at engine rpm in top gear, but I didn't realise about the dissimilar angles vibration problem.
The rubber couplings are constant velocity joints so that's the reason they were suggested. They also allow a soft drive and are lightweight.
Keep up the good work Ben.
I enjoy watching your progress & unique style.
I am happy to recommend a full bridge regulator rectifier to allow you to use the internal flywheel mounted permanent alternator to drive your scimatar continuos rated brushless cooling fan.
This would allow removing your additional permanent magnet alternator, both weight reduction and engine torque increase.
@@donaldpayne1376 Thank you!
The stator using the magnets in the flywheel I think is rated at 5 Amps, the electric fan I've got is 16amps. Does that mean it's not possible to use the stator and flywheel or is there a way to increase the output ?
My plan is to go to a belt driven fan, ditch the external alternator and use the stator already on the engine to power the water pump and gauges. I don't think an electric fan is going to do the job I need it to. Was hoping it would do but during the brief last trials with this setup it didn't look promising.
Sufficiently cooling the engine is a problem but I thought I would tackle that once it's back operational again, it sounds like you have the expertise to advise. 👍
@Ben-Dixey
you're right 5 amps will never make 16.
Although re winding the internal alternator and adding windings will increase output.
3 phase is ideal.
Good idea to make cooling mechanical.
Yes it'll easily drive your pump and gauges. Although I'd make sure to use a full bridge reg rectifier as many early outboard use a half wave with no regulation.
Single phase Often 2 yellow wires, a red + and black earth.
3 phase has 3 yellows.
@@donaldpayne1376 👍 I'm pretty sure there are three yellow wires coming off the stator.
@Ben-Dixey sounds like it's already 3 phase.
To test max output in case reg rectifier is inefficient,
Two test options
Safe option 1
If you have access to an old Lucas alternator 17 or 18 acr with black plastic back cover say a mk 4 cortina or similar.
I use the rectifier,
hook up the 3 [ yellow] phases to the original stator connections.
Earth to the mounting stud.
Positive to the large blade terminal
Hook up to a car battery with an ammeter in series.
Test 2,
1 second duration only.
Connect one stator leg to battery negative
Connect another stator leg to a 12v battery positive via an ammeter and connect for 1 second max.
Ammeter will indicate max current.
So this for all stator combinations.
1 second max test duration.
@ Thanks for this technical advice, I am under the impression the stator on my engine is faulty. It was a while ago now I looked into it but I think I measured the 3 phase output voltage and thought it was too low. I take it there is no harm trying to test the output of the stator even if it turns out to be faulty ? I've never had any power from this stator since I bought the engine and haven't tried anything to fix it. All
I've done is measure some voltages.
Was I correct to measure ac voltage to determine if the stator is faulty ? I can't remember what the voltage was, I mentioned the voltage in a video, will see if I can find it.
nice work so far. you're great on camera
@@licencetoswill 😊👍
We're here listening Ben! Another good video.
While I see the advantage of another reduction - that has to be balanced against the additional potential failure points. I would keep the mechanical complexity to a minumum and try saving weight elsewhere.
Exactly! 👍👌
Hey Brother Ben ,
Great to seeing you involved in developing new ways or improving older ways ...best use of the time...we really appreciate and enjoy it when you try experimenting , testing, analysing...for me most interesting part of any project.
oh yeah you look good talking to us towards camera, actually its more normal way to address the video or viewers on youtube .
Thanks a lot ,
I was wondering only three days ago what you might be upto , full use of time .
I will watch your full video on Laptop.
Cheers
@@rajeevshagun7409 It's so nice most people seem to prefer the talking to the camera rather than scripted narration.
I'll do more that way in future and hopefully I will get more natural at it with practise. It's certainly a lot less work to make a video that way which might mean I can produce more videos.
In everyday life I'm a quiet person and don't have a lot to say so talking to a camera is far out of normality for me. It's good though as it's a new skill to develop as was the narration.
Were you made to read in front of the class at school ? I was and it was a horrid experience as i was so bad at it.
Hope you have a good new year and thanks for the support. 👍
@Ben-Dixey brother reading front of the class ,i didn't like it either but letting my friend and viewers is interesting to me , I like to explain about things to people if I have something especial to tell .
I think you have something especial to tell us , it's very good you explain us in that way , it's like you talking to me or us directly.
Full support to you and your project brother Ben.
The little, helmeted helper at 2:59 was cute, until I went back and saw it was just your squirt bottle.
@@Patriottoo2 😆👍
What if you make that top part fixed. And to steer you just move your seat around to control it? Like a hang glider bar, or would that not be enough control?
@@DktheWelder I think it could possibly work, an acquaintance of mine was developing a weight shift helicopter but he keeps his cards close to his chest. Haven't been able to find out much about his experiments.
If it would work then it would be the Simplest helicopter control there is.
Always wonderfully and simply explained
I have a few OS Max engines that look like that!!!
I talk to my self all the time!
😆👍, the super Tigre engine was a result of full speed straight down onto the tarmac. I lost radio control 3/4 of the way through a loop. It closed the road in both directions while we cleared up the mess. very embarrassing and I never went back to that flying club. 😆
Good work
Add more support bearings.or use a spring.
G'day Ben,
Yay Team !
Naaah mate, you're not "weird" the local unfenced wild Kangaroos & Wallabies don't even scratch at your door, wanting to share your breakfast, half an hour before every Sunrise...
Building a Helicopter in the back Shed, well, not a lot of DIY Tinkerers can say that they have levitated anything like as far, or for as long - as you've done...; so, on the
Scale of Eccentricity,
You'll have to admit to being
At least
Noticeably
Cam-shaped -
Kinda thing...(!).
I like your reasoning with the Rubber Doughnuts, maybe try the Mix-'n.-Match strategy with a flexible Coupler at one end and a metallic Uni.-Joint at the other..., to have at least 2 Datapoints from which to extrapolate how much extra stiffness two Doughnuts might involve ?
The Metalwork was delightful to watch..., I wish my father hadn't hoarded his skills the way he did - I think he hoped to push me into going to do something at University which would "save me" from having to make a living by being good at making & fixing stuff - but I was taken to visit Sydney Uni. at age 3, and the grandfather trying to motivate me to want to attend..., succeeded in tripping over on the steps as we were peeking in through the door at a Lecture, interrupting proceedings, and having to apologise profusely as we beat a hasty retreat.
Which Imprinted me with the concept that a University is a place where clever people go to humiliate themselves...
So my metalworking skills are crap, and I never even applied to go to Uni...(!).
However, I reckon my father would like the Solar-Electric Chook-Chaser..., which, for whatever it's worth, has a Reduction-Train of 3 Gears in a diagonal line (bottom Cog submerged in Oil, # 2 half submerged, # 3 lubricated by Splash, and then a Jack-Shaft across to the other side of the Bike, turning the Drive Sprocket for the 4.4 : 1 Chain drive to the back Wheel..., the Ratio between the Motor & Wheel is 8.34 : 1 - so they've used 3 Gears to achieve about 2 : 1 primary Reduction...
Presumably they had their reasons for adding the "extra Step" in the Gearbox...
I suspect that splitting your Primary Reduction into 2 stages, as you outlined, will be tricky to achieve, but very well worth doing...
Especially if you add more
Triangulation into the
Airframe Girder.
I've refined my Formula to calculate the cost of installing enough of a stand-alone Solar Electric Equipment to be able to recharge an Electric Car, after dark when arriving home - with the Solar Batteries being recharged and floating by 11:00 Local Apparent Time the next (Blue-Sky) day...
The rig to feed the Sting's 2.3 Kw/Hr Battery cost $10,049, which is $4,369 per Kw/Hr...
Rounding up, to have a conservative Cost Estimate, that's $4,400 per KW/Hr..., and 10% of that was Federal Goods & Services Tax...
So, a "neat" $4,000 - in Oz dollars ; and the Exchange Rate varies daily with each Nation's Foreign-Exchange Gambling "Industry".
I'm at 30° South, so, to correct for your Lattitude, you will probably need to add more Panels - perhaps double the Array (?)...; but the Panels are the cheapest part of the Installation....(2 x 40-Volt, 440 Watt Panels, @ $385 each..., or 7.5% of the job...!).
A couple of weeks ago the figures were less refined, but I posted a Video using what I had at the time
"80 Years' Renewably-Powered Road-Vehicles, In Glen Innes ; Practical Realities...!"
Commencing at the local Museum, to consider my father's Charcoal-Gas Producer, which he made in 1943, and used to fuel his car in 1944 & '45 to take the family to the Coast (150 miles each way) for a holiday...(!).
Then, addressing my Chest Camera, I ride home (18-km) on the Solar-Electric Chook-Chaser which was bought with a big chunk of what I finally saw of Dad's Estate...
And, squeaking of alleged "Weirdness", for a bit if a sombering sort of a Giggle, you could always try,
"Prissydunce Musk, Driving The Trumpocalypse...; Rideabout/Talkabout, X-mas Video...!"
53 Km, 43 Km/Hr average speed, 57 Km/Hr maximum recorded (?!), 33% Battery Capacity remaining on return ; and it took 2:30 to recharge the Bike, and then 2 Kw/Hrs into the Gel-Cells to "Float" them the next day.
2-ton Electric Cars at 100 Km/Hr are never going to be any kind of an Emissions-free
Thing...; because a 40 Kw/Hr Battery needs $200,000 worth of Stand-Alone Solar System to recharge it - and running on Gridpower any EV is powered by a
Remote Combustion Engine.
Which is a bit of a problem,
Particularly for young
Elon, and all his his
Marketing Jism...(!).
Anyway,
Happy Solstice Festival !
Keep on keeping on...
Stay safe.
;-p
Ciao !
@@WarblesOnALot Nope, I've never had a kangaroo wanting to share my breakfast! 😀 you win that one!
I'm probably going to do as you suggest and go for the universal at the top and rubber doughnut at the bottom. If a problem with vibration develops then I will resort to rubber top and bottom.
It's nice to hear you liked the metal work, I enjoy it and it's a shame your father didn't pass on more to you. You're a clever guy but that can be applied mechanically or on paper, in the perfect world I would say both is the best. I know a few people that are brilliant engineers on paper but they lack mechanical experience. They can
make really bad decisions just through lack of hands on experience.
What's a chook chaser? Not heard that expression.
Charcoal gas producer to run a vehicle ?
Have a good new year !
Ben
@Ben-Dixey
Thanks !
There's literally no better way to greet the day, than when the Eastern Horizon is glowing Pearly-white, and one of the Hoppities gets up on the Deck to scratch on the door of my Hut...; and then they stand in a little semi-circle while I put Bread in their mouths..., there's a couple of (short) clips of that - one with Swamp Wallabies & the other with Grey Kangaroos, in my recent uploads.
Or in the Playlists there are probably a thousand uploads of similar interactions, posted since 2011...; I've been living up here since 1991, and they treat me as being their Family's pet Tame-Human...
I get the feeling that sometimes one can pick which items were designed by Academically-trained Engineers versus things built by people who'd spent a dozen years disassembling, tinkering, reassembling, pondering, sketching, and beavering away in the Toolshed trying to make something which works better, and/or breaks less often, than the bought-one...; before their Parents realise that they failed to make the cut for Vet.-Science or Medicine, so they push their pimply Offspring (with the two Left Hands) into Engineering - where they Ace the Paperwork and then get paid to design a series of unmaintainable Nightmares (thus achieving accidentally imbued Planned Obsolescence !).
It's kinda weird that Dad's father was a Wheelwright/Woodsman cum Coachbuilder/Blacksmith, his father was a Preacher before becoming a Teacher - but he was a Wheelwright before going into the (Wesleyan) Church..., and Dad morphed from Coachbuilder via Auto-Electrics to become an Engine-Reconditioner (with his own Offset-Chuck Crankshaft-Grinder in 1948 - the only one for 250 miles in any direction !)...; I started carving Propellers at 13, in High-School..., trained as a Registered General Nurse but retired (with a Bad Back) at 25, & began using my grandfather's Wheelwrighting Toolkit (which I had somehow inherited, piecemeal...) to commence trying to carve an Electric Windmill which would be as good as a Solar Panel...
And, then, my son was apprenticed as an Auto-Electrician under the apprentice of the apprentice of my father's last Business-Partner (back in 1958), and when he turned 25 his Boss sold him the Auto-Electrical business - and thus he received the Electrical Test-Bench which my father had built in 1928 - and with which Willi Struve had started his Workshop in 1960 (back when I was a Foetus...) !
Nature & Nurture, plus
Olde-Local Effect, which is a thing which Migrant types never ever do "get" - let alone benefit therefrom...; apparently.
My brother, 20 years older - from a different mother, who grew up in the Blacksmith & Engine Reconditioning Workshop..., he went into the Postmaster Generals' Department as a Telephone Line-Technician, and then to Ericson, where he retired as Manager for Installations for the Southern Hemisphere - having put the "Crossbar STD Exchanges" into Venezuela, Malaysia, Fiji & Saudi-Arabia..., before retiring...
But I was deeply into Aeroplanes & Dad hated flying...; so therefore my first Aeroplane hangs in the National Transportation Museum, because I was doing the Autodidactic thing for my Adolescent Rebellion, more or less.
I like to think that I did a better job raising my son to "fit in" to Society as an Eccentric, than my father did with me...; Matthew was, at 17, the youngest Deputy Captain to be elected to Office in the NSW Rural Fire Service - and these days he's literally as qualified as a Volunteer can become, at 35 he's been a Group Officer for 5 years, and on Breakout-Days, he's the Local Yokel whom the (salaried) White-Shirts from Sydney appoint to be the
Acting Divisional-Commander when they have no idea about what to do with the Fireground...
I had him wearing a 2-Litre Backpack, helping me put in our first Night Hazard-Reduction Burn in this Forest in 1994, when he was 5...; so he literally "thinks that's all within the 'Normal Range'.." !
Back in the 1960s, Honda began selling little
"Step-Through" Motor-Scooters, with 50cc 2-Strokes engines which were apparently marketed at aspirational Motorists in 3rd-World Nations..., and here in Oz the Post-Office bought them by the thousands, to replace suburban Mail Delivery via Bicycle...; and when they'd been in use for several years they began to be sold off to make way for newer models, making their way onto the Market where lots of families in Rural Towns & On Farms bought the 2nd-hand Postman's Step-Through Motor-Scooters for their Teenagers to play with, before & after School, on the weekends, going round & round the backyard or adjoining paddock....
Chasing their father's domestic Chickens, or those of their neighbour, was pretty high on the list of things which Kids like to do with a Step-Through...
So...., colloquially squeaking, a
"Chook-Chaser" is
Any little lightweight
Motor-Scooter which can outrun and scatter a frightened Flock of domestic Fowls..., but only
Barely...
Later on, when "Trail-Bikes" and Motocross were invented, the Children's /Tweenage & Teenage Market was catered to by increasingly tiny weeny miniaturized versions of Trials Bikes - all the little ones of which seem to have collected the
"Chook-Chaser" label.
Last time I was in the local Motorbike Shop they had a little 2-Stroke Trail-Bike, literally Knee-high, (10cc ?) and with Bicycle-type "Training-Wheels" poking out to stop the 3 year-olds from falling down & crying...!
So. Yeah...;
3,000 Watts, 4 Hp max. continuous Power..., looks exactly like a Trail-Bike - all the Bells & Whistles, fully Street Legal - but "Homologated" via Software to only 45 Km/Hr...
It's pretty much the definition of a
Street-Legal Electric
Chook-Chaser...(!).
I've logged 3,018 Km on the thing at this stage, slightly over 75 hours, this last thousand Kicks done all on Solar Current ; it might be slow, but every time I ride it I feel delightfully smug to be going somewhere - without burning Petrol...!
In the same way that Wood can be
Pyrolised into Charcoal - and after Water-Vapour the Wood produces and outgasses Methane & Carbon Monoxide, both of which burn - plus Carbon Dioxide & Terpines, and LOTS of Creosote & Tar & toxic crap...; and the Gas can be collected, filtered, scrubbed and used to burn as Fuel...
Apparently the amount of cleaning, scrubbing, and filtering can be greatly reduced if one first makes Charcoal from the Wood, & then designs the Gas-Producer accordingly, and runs it on pure Charcoal...
To see the one which my father made - with my best reconstructed recollection of how it was said to have operated...(!), backtrack me to my Uploads...; I rode in to the Museum to start the video there, and after maybe 5 minutes of Introduction/Orientation walkabout in the Grounds, perusing old Steam Engines (including one restored by my father) there's about 10 minutes devoted to the Charcoal Producer(s).
They have two of them on display, with Dad's being the larger & more complicated...; they were mounted on a Platform or Shelf attached to the Rear Bumber-Bar.
The Firebox/Charcoal Hopper and part of the Gas-Filtering Setup was Water-cooled....; so a Steam Explosion was one available possibility...
The Gas it produced was hot, poisonous, colourless, odourless and
Explosive...; carried underneath the floor in a thin-walled Sheetmetal Pipe running to the Engine - where any sharp rock thrown up from the dirt roads by the wheels..., might be able to puncture it...
But, considering that the Sting & it's Solar Setup was all bought with money from Dad's Estate (which took 42 years of Paperwork to reach my Bank Account...!) ; I figured that Dad's Charcoal-Producer and my Solar-powered Motorbike should probably be introduced to each other, and the Bike has now been taught to carry the Walking-Stick which I inherited from my grandfather, in 1963...(!), so it too came along for the ride...
If I had more spare money, I'd probably illegally rebuild my second Aeroplane using Electric Motorbike Power, to prepare to stand in as the
Silent Ultralight-Motorglider version of the Gyro-Kapitan in the Mad-Max 2 Movie...
Take off, then thermal up to 10,000 ft with the Blade-Brake stopping the Propeller ; and when it gets cold, come back down at 50 mph/500 ft/min in Stage-4 Regenerative-Braking, operating as a 450-pound Free-Flying Electric Wind-Turbine....
That really would be fun...!
But - I'm using the funds to buy 2 Air-Conditioners, 660 Watts each, to render my Hut & Toyshed (10 by 12 foot Lawn Lockers - both thermally insulated...) actually habitable when the next intense Heatwave shows up, and the next one..., ad infinitum for a while - at least.
Each one pumps 2.4 Kw worth of Heat out of the Enclosure, so hopefully I can run both on 1/3 power to cool both places ; on what the Solar Panels produce in daylight (?), so that my daughter car retreat into the Cool without having to share a Lawn Locker - kinda thing.
The Heatwaves are getting hotter as time goes on - so one has to do
SOMETHING with the resources remaining....(!).
When it's over 40° in the shade, then a Hammock under a Tree simply doesn't work well enough, and last week it was 47° at Wilcannia...
And, yet, The Greens are lucky to poll 8% , 12% at best, here in Oz...: where the ruling Sheeples are determined to
Grow their EcoGnomie
By using ever more
Fossil-fuelled
Industry, Transport, & Processes.
At least this hundred-acre Endangered Species Sanctuary seems to be a good vantage-point, from which to observe (the antics of the rest of the 8 Billion !).
Such is life,
Live a good one...
Stay safe,
;-p
Ciao !
Keep up the good work Ben, I have a Shelf full of offering to the "Weight Gods" (Bless Burt Munro)
@@julianmills9954 👍 I need to watch that film again, it would mean much more now! As you say Julian weight is king. It's amazing how much weight you can lose out of parts by a redesign or change in material. I also used to think just because I chose aluminium as a material it's bound to be lighter than steel. Not so in some cases, all things need to be considered. Have a good new year 👍
Nice project.Y wana buil,a coaxial heli with bike engine,because of gearbox end cluch.Anyway,y sugest you to mount reductor on the engine.
@@wwscirocco1fan Bike engines can and have been used, if you can remove all the gears you don't need it would make it lighter. 👍
Awesome project. I hadn't seen any of your previous videos, but this popped up and I had to click thinking that somebody is putting a turboprop in their homemade helicopter. Just slightly disapointed.
@@cyndideweygary Maybe one day a jet engine will be on the cards. Can't beat the power to weight and reliability.
They sound pretty awesome too.
ruclips.net/video/fRp2uAYWa_A/видео.html Certa 1993 - I also designed the Jet Exec turbine conversion
Don Hillberg ruclips.net/video/Qa0QAp6yeZc/видео.html Oshkosh 1995
@ I hadn't seen that second video before, nice. 👍
@@Ben-Dixey Anytime, There's a guy in China who has a twin piston engine two place flying...
@ Coaxial or single rotor?
Gray zhu on RUclips built a twin mz202 engined single rotor, two place machine. We message quite often.
Think I've seen a two place coaxial too, can't remember what the power plant was.
The helicopter that I inherited in the late 90's I believe had a chain coupler for one of those connections and a nearly heavy duty designed polymer coupler also....I may be mixing that up but I have seen those work in those applications.--John
@@Biokemist-o3k Hi John, what helicopter was it that you inherited?
@@Ben-Dixey If I remember correctly I believe it was a Robinson R-22...
@@Ben-Dixey I believe it was a 1970 or so maybe 1975..
The rubber driveshaft coupler, doesn't that require metal shim plates for the flex? Just the rubber will pull it's self apart? The metal shims help hold the rubber together & allow flex?
@@rickshaw3005 not that I'm aware of, I think these rubber drive couplings were developed from the metal flex plate design.
Hydraulic? Run some hoses.
Welcome to the wierd ones, Brother! 😆👍
Hi Ben, good vid........if you had a gear down coming of the engine the shaft is going to be way out of center to where it should be, and this extendable universal drive shaft I don't think anyone's used it on any machine and flown ?
@@cloudusterable Hi Peter, thanks and yes the drive would change the position of the shaft unless I moved the engine back. Doing that causes balance issues to sort out.
I haven't seen any driveshaft like I've designed, wonder if it will work?
Have a good new year and I hope you are still tinkering.
I'm always up for a good engineering soliloquy.
Brain dump talk is always good as it shows what constraints you are weighing up, Ben.
I'm a little disappointed that the Glid Doman / Dave Jackson CV coupling didn't get any consideration. A variation of the design, replacing the inner shaft with a ring, would give you a ring CV design. This means you could nest two CV couplings concentric to each other. This means you could do counterrotation with one CV inside the other CV. This means you could put the 2 concentric CVs above the drivetrain. This means that the drivetrain doesn't have any real angle or slip to consider. This means that you can keep the drivetrain simple and light. It also allows space in the centre to fit a collective control cable and actuator.
The downside is a lot of machining, and you could struggle to fit the ring on the lathe. You might need to get those later cut. But surely worth thinking about?
@@martingarrish4082 Hi Martin, sorry to disappoint, the reason I'm yet to really consider the option is I haven't fully grasped it. Sorry for being dumb I know you have given me the information already.
@@Ben-Dixey , no worries. I thought that might be the case. I'll see if I can sketch something out or swing by at some point for one of my technical arm waving sessions. 😁
@@martingarrish4082 Perhaps a few direct questions will get it into my head Martin? if you would be so kind.
Cvt (constant velocity tranmission ) ?
Replacing the inner shaft with a ring ? I don't understand. Do you mean drive the inner shaft via a ring ?
How is this different to the air scooter, other than you can feed collective controls through the centre of the drive ?
The reason I didn't copy the airscooter is because I thought I could do the rotor reversing using the same belts used for the drive. A potentially lighter design.
If you would rather explain in a different way, no worries. Thanks
@@Ben-Dixey , sure.
"Cvt (constant velocity tranmission ) ? "
That was a typo - I meant CV (constant velocity coupling) and have edited the post.
"Replacing the inner shaft with a ring ? I don't understand. Do you mean drive the inner shaft via a ring ?"
For the outer CV coupling I mean no solid shaft at all. Instead use a ring, or short hollow tube, to transfer torque from the upper belt pulley. The lower belt pulley could drive a shaft, or it too could drive a ring or short hollow tube. This would put both CV couplings on the same plane with one concentrically inside the other. The concentric Doman / Jackson couplings allow the coaxial rotor head to tilt.
"How is this different to the air scooter, other than you can feed collective controls through the centre of the drive ?"
Couldn't find details of rotor head as Wayback machine offline. From video I found it looks like that is similar to what I am suggesting, but they are using a gearbox at the base of the rotor with single CV coupling drive. What I'm suggesting is keep the belt coaxial drive, but fixed to the airframe not the rotor head. Then connect the two belt pulleys to the coaxial shafts via 2 coaxial CV couplings. One CV coupling sitting concentrically inside the other - this is why you need to drive the outer CV coupling with a tube or ring rather than a solid shaft. It only works with a Doman / Jackson coupling.
@@martingarrish4082 Ok thanks for explaining, I believe I understand the concept. Keep the reversing via belts and keep the drive fixed but articulate the rotor shafts via concentric cv joints. Is that correct?
The bottom rotor would have to be raised to clear the drive frame as it would no longer clear during aft cyclic. That would also mean the top rotor would have to be raised too. Not a major problem just a consideration.
Have you seen a coaxial cv joint anywhere before ?
It's better to see and hear you, we get more feedback from seeing your expression
I would agree.
As ever, an excellent video Ben and amazing engineering wayyy beyond my peabrain comprehension!! Hope you had a good Xmas and here's to 2025 for you pal! PS - Talking to yourself and forgetting you are recording it pal works well. I should know!! ;-)
And being in front of the camera was fine.
Don't worry! Because in these circles, it's an honor to be called a weirdo.😃
@@mitubachiflight perfect 😆👍👌
Why don't you outsource some of those parts so you can build faster?
@@SystemsPlanet Hi, it would result in a potentially faster build depending on part lead times, I have some friends with a top notch cnc machine shop and I would 100% trust them to do a fantastic job on any parts I needed. The problem is it's currently cost prohibitive, maybe one day it will be an option and I could spend more time thinking about other flying machines I would like to build.
Thanks for your continued support and have a happy new year!
Cars use a Rzeppa joint aka Constant Velocity joint for this
@@SunilSundar yes. Had problems with a similar joint, the main one being cv boots can't take the rpm.
Rubber couplings if they can be used are constant velocity joints.
wait so why did everyone recommend flexplates when a CV (constant velocity) joint is what you're looking for...?
@@manitoba-op4jx Because I've been down that road and had issues.
A Thomson constant velocity joint might work though.
Addressing the camera let's you indicate which parts you are referring to.
Hmm, Machinist here.. 1 deg ain't much, even at the very top of the rotor measured from the coupler. Be careful.
Why not rigidly couple the motor with the rotor, doing away with flexible couplings. Then just an allow the motor to move with respect to the frame. Talking to the camera was just fine. It was only strange in your head!!
@@timcorso6337 it's been suggested before but could work.
In the previous video I talked about the configuration with the engine attached to the gimbal. The only downside is the higher vertical position of the CG, not necessarily a problem in flight but it would make a dynamic roll over more likely. It could still be something to consider, it would make the machine more weight shift with the extra weight to resist moving.
Yeah, you're right, it's in my head! Hopefully will get more natural with practice.
Excellent project mate :) Am I detecting you are ex-RAF (like me) ?
@@zenzen9131 I have to disappoint and say I'm not ex-RAF, it would certainly be nice to be able to say that and nice to be compared but no. I did a mechanical engineering apprenticeship from school and worked for a few engineering businesses. Can I ask what you did in the RAF ?
Are we dead yet daddy
Nice to see you continuing on your project. Don Hillberg ruclips.net/video/fRp2uAYWa_A/видео.html Cheers
@@HongyaMa Thanks Don, great to have you watching, maybe one day I can achieve what you have!
We are gonna ser you in the news twice. Once when you fly it and once when it either flys apart or crashes, then flys apart. Looks like an awfully flimsy frame. Im not an engineer but have done a lot of it in my 61 years. Good luck and please be careful
@@robertdinicola9225 The frame is flimsy, particularly at the moment because some bolts are loose and bracing is removed. I don't mind a little flex as it cushions the terrible uneven running of a 2 stroke engine which reduces the stress on the drive components, but too much flex must be avoided as you suggest.
2:28 so boring
@The_Chillguy7 yes, it was a little. 😉