1947 Lifting Body Burnelli Concept Aircraft - Anatomy of a Trim Session
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- Опубликовано: 12 сен 2024
- This film shows a few of the stages of building the 37" free-flight rubber-powered Burnelli Transport concept aircraft from 1947. It then focuses on the methodical, eleven flights of the model's first trim session, ending in a beautiful soaring flight in Wawayanda, NY, where the many curious & vocal bobolinks had a front row seat or perch. Filmed by Tom Hallman on 5.25.24 with a Canon PowerShot SX20, and iPhones 11 & 14Pro. Music via the talented musicians at ArtList.io, who breathe life into my films.
First day notes with the Burnelli:
Started at 200 winds…then methodically worked up the ladder by
100 and then 150-200 turns with each new flight. Max turns in the 1900-2000 range.
Used the same motors (2 loops x 3/16" x 40") that singularly power the 27" Seafire & 28" Cauldron. Both use a 10" EB white prop...compared to the 8-7/8" props for the Burnelli.
The quick fix was more downthrust (twice), nose weight, right rudder via
1/32" thick gurney flap, and a touch of gurney on the lower left to help hold that right
turn…although I might remove it or adjust the location after seeing what the increased torque did to the initial power burst. I’d rather see the bird climb a bit flatter thru the first circle. With 500+ turns to go, I’ll need to keep an eye on the torque effect.
Cracked a bamboo skewer prop spar...twice, when it outflew the field, landing on the hardened dirt of the neighboring crop section. I’ll resolve these issues for the future. The 1/16” dia. toothpick rivets that I use are great for holding the blades in place, but I should not have had the one closest to the hub, as it created a weak spot in a heavy stress / leverage area.
I thought I’d be OK with shrink wrap tubing for the canopy but the hours of hot, direct
sun had other intentions, so that’ll be replaced with the good stuff, PETG plastic via the vacuformer.
I have growing concern for the lack of a DT on this model. But yes, a fantastic first day out with this unusual design.
*******************
Wiki on Vincent Burnelli: en.wikipedia.o...
News reel footage of the similar design from the late 40s: • HD Stock Footage Canad...
Making props from a cheese container: • Free-Flight Basics #11...
Here's a source for rubber: www.faimodelsu...
Generic rubber turns calculator: hallmanstudio.c...
Article on the use of dethermalizers: www.hallmanstud...
Badge Classic DT & spring (at the bottom of the page): www.starlink-fl...
*** 10 steps to trimming a rubber model, by John Koptonak: www.flyingacesc...
Also, these tutorials from Easy Built Models: easybuiltmodel...
Looking for a Flying Aces Club near you? Check out this link: flyingacesclub.... If you click on the map at the area closest to you, it will automatically bring up an information request link. That request goes to FAC GHQ and also to the Squadron Commander of record for that squadron.
For more info on free-flight rubber-powered models, check these websites:
brooklyn-balsa...
www.easybuiltmo...
www.volareprodu...
www.flyingacesc...
National Free Flight Society - freeflight.org/
Mike Stuart's Flying Scale Models - www.ffscale.co.uk/
www.freeflight...
Flying Aces Club merchandise: www.cafepress....
All profits support Flying Aces Club activities.
Center of Gravity merchandise: www.cafepress....
You build the best looking planes. Where do you go searching for old planes?
I saw it on that old magazine cover, then I searched the web. It came from this link, if you scroll down toward the bottom of the thread, you'll see a group of pencil concept drawings. www.secretprojects.co.uk/threads/burnelli-projects.3888/page-4
@@maxfliart thanks.
”Secretprojects” not a site I would have visited with confidence under other circumstances :)
I like your choice of the asymmetrical cockpit but there are some nice sketches in that thread. I like this design, kind of P-38 meets the jetsons.
i.pinimg.com/originals/ab/8a/09/ab8a0956f06964a0a9836f28e6345c57.jpg
@@maxfliart I just watched the JD-2 Delta vid, the plane is cool but the story is better. It takes a LvL10+ to build one of those jobs. It could be a rubber band hotrod.
ama site has free plans for all old planes about 800 i saw.
This video lowered my blood pressure and stress. My grandpa used to build free-flight planes for us when we were kids. This brings me back to those times. Thank you for sharing this with us. It was incredible. The hair on my arms was standing up watching it fly. It doesn't take much to make a boy's heart happy.
Thx. Glad you enjoyed it.
That last flight gave me goose bumps. Such purpose and authority. Stable, yet sensitive. Balance of lift, thrust and bank. The lifting body gave it a uniqueness in flight that felt like an intelligence at the controls. Absolutely spectacular and one of the most inspiring free fliers I have ever witnessed. Congratulations and thanks.
Thx. Truly had no idea what type of flyer and peculiar traits she might have...especially after the first few tosses. Now I have a much better sense, and it's not as unpredictable as I had initially imagined. Just need to tame the rotational wing angle at the launch as she continues up the ladder toward max torque. I was surprised how quickly she gained altitude after a rather low first two circles on the final launch. As long as she's staying generally flat or stable after the power burst, I don't care which way she goes....although it is curious to see those long dives before pulling out, or not. Maybe a slight tweak on the lifting body's TE, rather than on the stab, as a more gentle adjustment? Fun stuff for sure.
@@maxfliart Adjusting the TE of a fuselage is uncharted territory. Probably why she needed such massive down thrust. Please keep us apprised of your progress.
@@maxfliart I wondered if the incidences are effectively slightly different between the lifting body and the outer wings? Could account for some of the irregular instability.
Fantastic lookig model, I learn something every time I see another of your videos. Well flown.
@@godfrois2408 Good observation. That's highly likely. It was a bear trying to figure out how to line them up, but once determined, I'm left to react accordingly. Hopefully I can dial her in, leading to a fully stable flight from the power burst, through the glide...and not lose her OOS in the process. !!
Wonderful.. My Dad flew the CBY-3 for RANSA in Miami😊
Oh my! Was it as stable as they say? Films looked smooth.
CBY-3 did great, it was very efficient but with only a pair of 1820's (Wrights) it was no match for a C-46 which was dirt cheap surplus, carried more and was faster. My Dad loved Vincent's aircraft and knew it was a winner but in airfreight, the numbers don't lie so RANSA had to pass but apparently Dad really pulled for it. BTW, he spun it at gross weight and apparently the 55 gal. drums filled with water weren't secured properly and shifted aft... and it still recovered.. Why anyone would do this is beyond me but apparently it was a demo flight and part of the maneuvers on the test card. FWIW.. I would like to build a slightly larger version, any chance of getting a copy of your prints for a starting point? 😎 The stuff on Outerzone is all earlier versions ... Tell me the cost and I will pay..
Blessings ! Al Robinson (near Memphis)
@@user-rm5cc1nh2w Thx, Al. I've not yet gotten the plans into a presentable state, as they're rather scattered, plus much of this was 'built in the air' as we call it, when u have to adjust accordingly. I'll keep u posted when it's closer to a useable state. Thx again for sharing ur dad's experience. Truly incredible that uv connected. Respect.
Absolutely gorgeous! Your patience astounds me. Thank you.
Enjoy ,dear friend!
Good flights!
Beautiful aircraft in a great video with nice music. I really relaxed while watching :) Well done!
wow, so nice! I love the Burnelli designs and have built two such experimental r/c planes by myself, too. They were very floaty. But sadly I built them too light and both had structural problems. Getting the c.g. far enough forward was difficult, too. The NiCd-battery weighed as much as the rest of the plane and was at the foremost position.
Thx for sharing.
So good mate, I find your videos very soothing and informative.
Really love it..
The finger holes are great!
What a lovely build of a fascinating aircraft!
So awesome!! I cringed on that last tumbler...obviously excellent construction to have survived that with little damage, you sir, are a master of your craft and it definitely shows. Thanks for sharing with us! U ROCK!
I hear you. I was not expecting to see minimal damage as I walked after her. Fortunately, she's repaired and ready to go again, hopefully this week.
@@maxfliart Looking forward to it!
Beautiful model and amazing flight! Congratulatiosn from Brasil!
Thx. Cheers.
Your videos are just amazing
Wonderful build and flight!!
GLORIOUS !
Thank you for sharing!! 💕💕❤❤
Super nice model and what a flight!
Excellent work, cool Video. Your creation has earned itself a need for a DT, or perhaps a GPS thing. Super sweet build.
Yeah...thx...I'm seeing that as a concern...though I could never imagine she'd soar like this.
That's a work of art.
No it’s not it’s just a model aircraft
@@tonywright8294 Built one?
What a sedate and stable model and once trimmed it flies beautifully. Well done.
Phenomenal build and a wonderful video. Congratulations! A couple of times I thought I was watching a P-82. Next build? 😉❤️🇦🇺
Thx. Clean canvas. Perhaps another towline glider or a simple non-scale ship to keep the balsa flowing.
You represent perfectly the Wright brothers concept: fly-fix-fly. Congratulations for your effort and determination. Nice model and flights!
Thanks for showing us how to do the markings. Brave choice, top shelf construction as always.
Just right. Beautiful vid. Thanks for sharing.
Beautiful work.
Amazing build! The CBY-7 Burnelli is one of my favorites! Thanks for sharing!
Superb !!!
Really beautiful. This goes to show how patience pays off when ramping up the winds during trimming.
Some lovely flights, and I look forward to seeing more of this superb twin!
Nice one Tom. 🌟👍
Masterful! Beautiful, as always. "It's a big model". lol.
Thank you for your craftsmanship and patience. It's a great concept worthy of your attention.
13:45 it looked like she wasn't coming back! Beautiful build, and really something to see her fly.👍👍
Yes, I had a moment. Thx.
A work of art.
I was about to write the exact same words!
it is amazing
what a statement
what a life style
A perfect recluse
A picture perfect retirement
A country side away from the hustle and bustle
Transport without engines just horses
Hobbies without motors just rubber bands to unwind.
He goes for a walk along the stretch of colourful green landscape
He winds to unwind his hobby plane
He then gazes into the clouds watching his hobby fade away into the sun set
What a dream like state
Sincerely
Ejike
Love it! Thx.
Another masterpiece build! Finger grip hatches, and vertical motor pegs (!) Brilliant and innovative. I would never have thought of either, but the vertical peg makes stooging easier - gotta try that eventually. Cheers!
Thx. I'd long pondered how to launch her prior to building the fus....then while handling the finished frame, I naturally held it using the inner formers....so wa-la. The trap doors became the answer. Otherwise, I would've had some strange apparatus thingy that would've been a fiasco for each launch.
That was my thought. Some sort of cradle that would act as both a prop stop and a launcher sort of like HLG launching. A kind of model atlatl (lol!)
Absolutely wonderful. Superb build, huge respect.
IMO your best ever ,absolutely beautiful
Thrilling, Tom!
Truly wonderful!
Mi mayor admiración, sos el Rembrandt del aeromodelismo!!!
Thanks for your kind words.
Nice job.
super cool aircraft!
Just Brilliant.
She's a beauty and looked like she loves the air, you'll have alot of fun with this one.
Thx, Michael. I'm looking forward to future trim sessions.
A bit of effort to get there but man it looks grand in the air. 😎👍
even the repairs are a work of art 😅
これは近年稀に見る、最高で熱い試みです。
ありがとうございます。プロジェクトを楽しんでいます。
finally after a moth, cool concept
Love your models
Absolutely amazing. Thanks for taking the time and effort to share it with us.
Hi Tom! WOW what a plane! It's too bad that the full sized ones didn't get built and put into some sort of airline service. Of course, in a couple of years later the DeHavilland Comet was introduced and the Jet-Age started. The trap doors for launching are just genius! The structure is a work of art, too! Can't wait to see this one fly more! Simply fascinating!
One was at least built and flown...there's a beautiful film on the web...but clearly he didn't have the financial support needed.
@@maxfliart This is the Windracer UAV. It is definitely a Burnelli lifting fuselage like your beautiful model. BBC News: Windracers UAVs supplying Isle of Wight
ruclips.net/video/rMKciVKr-Vg/видео.htmlsi=ukd3D5geKvVnkbwB
Tout simplement SPLENDIDE!!!😃🤗
WHAT A NICE SURPRISE FOR THE END OF THE DAY...😉😎 WATCHING YOUR NEW VIDEOS ARE ALWAYS FOR ME SOME VERY RELAXING AND "SOOTHING" MOMENTS ESPECIALLY WHEN YOU POST THEM RIGHT AFTER MY WORK TIME!😊😉
A MAGNIFICENT BIRD!!!
WHAT A WONDERFUL PIECE OF ART... HERE YOU SHOW ONE MORE TIME ALL YOUR MASTERY...🤓
I WISH I HAD ONE JUST LIKE THAT😊🙄... IF ONLY I HAD YOUR TALENT...😧😔
BRAVO!!! 👏
Thx. She's been a dream project.
Just beautiful. Staggering build quality.
Very nice!
Wonderful.
the stall issue youre having happens with real aircraft as well, we call it the accelerated slip stream. the propellers are accelerating air over the aerofoil and giving increased lift, this is also asymmetric but i think you'll find a solution to that. but on twins, we land with power on because they just dont glide very well
Thx. All of my twins have that moment of hesitation or even a stall once the power runs out. They tend to drop a wingtip, dip down a bit, then recover once the freewheelers kick in, where they're at least spinning again. This is where they'll flatten out and cruise about on their merry way, to one side or the other. It's a beautiful thing to see. In this one's case, at this early stage, I'm glad to at least see her float about at height, and sway one way or the other, as the air chooses to take her. I just don't want a spiral in the glide. But yes, a tweak is needed for that rapid descent in the downwind glide. She's shown that if she turns back, she'll correct herself. But I love seeing the new, individual characteristics of a given model. Each has a tendency that needs to be acknowledged, and tamed as needed. Therein lies the fun.
Thank you for a much needed boost this morning.
Thx, Harry.
Impressive model and flight!!!!!
Fantastic!!! A great subject Tom!
Wow. I'm super impressed. I'm a big Burnelli fan and you did it justice!!!
Have you ever seen the CBY3 Loadmaster at the New England Air Museum? If you ask nicely on a quiet day they may even let you get inside it. It's the last remaining one in the world.
Thx, yes, I've heard, but have not yet visited it.
Beautiful! Awesome job, very inspirational 👏
Amazing 😎
Thank you, a wonderful story told.
Great build 👍👍
The Wittman Tailwind homebuilt airplane, has this same kind of "lifting body" principle going, too.
absolutely gorgeous
Complimenti un bel lavoro, sono poche le persone riescono a pensare e costruire quello in cui credono.
Lei mi ha ricordato il mio amico Paredi che nel 1956 aveva costruito un aereo ad elastico con il legno della cassetta dei limoni una camera d' aria di bicicletta due rotelle ricavate da due bottoni.
Appoggiato a terra su un pavimento di pietra ( ingresso della villa dei Tasso celadina Bergamo) lasciata l'elica decolla va dopo 4 metri attraversava la strada e finiva nel prato di fronte.
Uno dei ricordi più belli , avevo 6 anni.
Meraviglioso. Grazie per aver condiviso quei ricordi. Adoro le ruote con bottoni!! Wonderful. Thx for sharing those memories. Love the button wheels!!
Very nice 👌🏼
Really nice build/fly vlog. Your build vlog was really nice on this one. Framework is gorgeous, a shame to have to cover it...nah, your covering jobs are a treat to see too. I have to say I'm a tiny bit toward watching the builds more enjoyable than the flying...wait, no, that was awesome too! ❤❤❤️❤️❤️❤️ Moses
I think we get discouraged too early, causing adverse affect and accepting failure instead of trying to tweak ever so little til we accomplish success and take a win. I know this because I've accepted the failure too early in my own life instead of making little changes to see if it changes the outcome... This has been an eye opening video for me in the least to not accept failure too easily or too soon but maybe make small changes to change the outcome who knows might lead to a successful ending!
Thx. It pays to keep at it.
Best yet, my man. Fantastic.
Nice!
When it said it was a lifting body, they weren't joking. Nose high!
Ha. Indeed.
Good stuff, Bubs.
you do pretty work Tom🤠
Thx. I really enjoyed seeing her come together.
Very, very cool!
She would look great with small electric motors
I would love to have that high grass!
Yes, I'm thrilled to have access, and was in a rush to finish the model before the farmers harvested. That was only 3 days ago, and there's a chance it has already been chopped, so Saturday was my lone day for having that soft cushion. Too bad my model out flew the meadow three times though....ugh.
The UK has given drones of this concept to Ukraine that can carry a 100kg and 12 hrs endurance up to 1000 km. BY Distributed Avionics ltd
That is beutiful.
A gorgeous model for displaying and flying! The trap-door launching grips are a work of genius. I noted you put a great amount of effort and thought into your winding stand, also. Have you thought about contra-rotating propellers? Thanks for the video.
I do use counter-rotating props, which spin over the top toward the tips...but not contra. I don't believe Burnelli ever used them, even though the magazine artists of the day were apparently pushing for it.
@@maxfliart By "contra rotating" I think you mean "co-axial"? I consider "counter" rotating and "contra" rotating to be the same thing.
@@UguysRnuts As my dad would say, "it's easy to get your mix all talked up"...when talking terms like counter, contra & co-axial. Anyway, I've only considered single props, rotating over the top toward the tip.
I wunder. What would the original designer/designteam of this plane say if they see this model and video... Greetings from the Netherlands🇳🇱👍
Thx....I too would hope they'd enjoy seeing one of his concept designs flying free-flight. Sadly he's been gone since 1964, but perhaps his extended family is still connected to aviation in some way? ¯\_(ツ)_/¯
Beautiful as always. Question; what paint brand do you use for airbrushing tissue?
Thx. I only use Americana *Gloss* Enamels. They're an inexpensive acrylic enamel that can be thinned with water for airbrush use.
@@maxfliart Thanks! I was about to ask the same question. As I spend a lot of time working on engineering CAD, I prefer a bit of artistry when decorating my models.
@@HowesAero Just don't confuse them with Americana 'Acrylics', because they will melt on the tissue if you use a glue stick and then rubbing alcohol for attaching to the frame. The Gloss enamels however are not reactive, and perfect for the tissue.
@@maxfliart As I'm in the UK, that brand is not available, however there are a wide range of acrylic inks and enamels that are so I'll experiment. Thanks, your models always inspire.
@@HowesAero The Americanas are surprisingly inexpensive ($2.50 for 2oz) and they thin to around 5-6oz of paint, so I hope there's a similar product in the UK. They're identical to the Model Master Acryls, which can be $5 for 1/2oz....crazy.
Are you up to swapping props, side to side. P-38 had outboard turning props, but that was supposed to be to make a better gun platform. From the pilot's seat both engines were critical. So minimum single engine speed was 140.
Seems like you've created the perfect vehicle to test outboard versus inboard rotation.
No, they'll stay as they are, rotating over the top toward the wingtips. My mentors with FF rubber twins have resolved these concerns many years ago, and found this rotation to work best for our small, and relatively low RPM models, and I agree. All of my twins have been stable, using this approach. Thx for asking.
wow
Had to watch this several times. The Burnelli Lifting Body is an aeronautical atrocity. You have three wings with four tip vortices dumping energy into the wake, making drag. Short separation between wing and tail is not good for pitch trim and stability. The canopy on the left fuselage will drag the left back. Sometimes. Didn't seem to be present in the glide test. May depend on speed and attitude. Using right rudder to fight that means they are fighting each other the whole time, wasting three times the energy. The rudder has to overcome the canopy drag and then some more to make the right turn. It might be better to let it go left. Everything else is symmetrical. The original had a central pod. First power flight clearly showed CG way too far aft. You've got to replace two heavy motors up front with the rubber motor going way to the rear. Fixing a trim problem with thrust line is not a good solution, only works under high power and varies with torque. Downthrust pulls the airplane down, not the way we want to go. Best to get he CG in the right place, use the thrust to pull the airplane forward. The sequence of winding may affect turn. Motors lose torque while resting after windup. Winding the left motor first will result in the right motor pulling more. As the power goes down, the effect becomes less. It doesn't seem to know which way to turn. It seems to want to go right under power and left when the power comes down, but there seem to be inconsistencies. It may be favoring one direction with the nose up and the other with the nose down. The balance between rudder and canopy may change with attitude. It's pitch attitude is inconsistent. The varying ratio between the motor torques may affect it. Very interesting dynamics. A challenging design. Often modelers can do better with a design than the original. You can tolerate a lot more crashes.
The main fuselage is someplace up north
Incredibolskis !
❤❤❤
Are you shrinking the tissue before applying all the graphics/color to the tissue prior application to model.
Thru the process of adding the base color to the full sheet of tissue while it's on a frame, the tissue will naturally shrink from the water based paints. I figure that's plenty, rather than shrinking them first with water prior to painting. I'm using the older, and rarely available Micro-X True Old World Jap tissue which was pre-War...and it has a rather low shrink rate compared to more commonly available tissue, ie Esaki, Mt. Fuji etc. The bonus of course is less warping of structure.
,,,,do these propellers have a neutral spin in the hub/shaft.,,,after power is lost they keep spinning???,.....imo,....add ,if not,...tnx,,,pat,...land o' lakes,wi.
Yes, both have a free-wheel ramp so they’ll continue to spin after the power fades, but it’s still a lot of drag.
Your builds are pure art! I have hundreds of free flight plans an would like to share with you, how can I send it to you? They ara all digital, about 5Gb of plans..
Thx for your generosity. I would suggest sending in a few stuffed / zipped folder via WeTransfer.com. 2G limit. Email: maxfliart@hallmanstudio.com
Just send some of then to you Max, hope you like it. Greetings from Brazil!
@@sblim2 Got them...thx so much. They're a good foundation of plans for any modeler! Cheers.
Where did you get the plans for this model ?
It's my own design, but the plans are not yet available. I based it on a 3-view and original pencil sketch from '47.
There’s no patience involved you just build until it’s done