Building a DIY Drone Sailboat
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- Опубликовано: 21 май 2024
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Previous Sailboat video: • Building an Autonomous...
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Always enjoy your videos. Good job with the ads too. Get that money!
ruclips.net/video/03CfvR0sTfo/видео.html
I just had a vision. Treadmill/Snow mobile treads on the bottom of Boat. Imagine bottom of Boat one large rubber paddle.
The foam sail is really holding you boat back there’s a reason parachutes are made of fabric and not flat wood
Great improvement over your prototype! Next steps to help you tack:
Lose the elevator. Its drag is probably the main culprit, and you can use servo control now that you've got wind direction.
2 fair your foils! You put a lot of thought into your airfoil and hydrodynamics on other projects, then you come in and use a plank for a keel and rudder. Give that keel a nice cross section and you'll improve speed and leeway.
I don't actually know if any of this is correct, but I know enough about sailing to know he's using the right words so he's probably right.
@@JD2jr. lol
He put a leading and trailing edge on the keel, and the rudder is a very thin piece of sheet metal.
@@jeffh8803 The rudder is the main problem. It's the equivalent of trying to use an oar to steer. It works, but a proper foil section would work much better. Also, the foil section on the keel doesn't look like its actually a proper foil section...
Second the elevator suggestion. It's just not an efficient way of controlling a sail, especially given the power of modern servos and the small sail area. Also, I would be interested to see how well a canvas sail performs compared to a wing sail.
The lack of comments about it almost makes it look like betterhelp is a blocked phrase
Thats what i feel like man, how are more people not calling this out, this has to be the worst and most immoral sponsor you can get.
Please bring back the autonomous soaring, it would be a blast to see it fully taken advantage of!
Yes please
Yeahh!! I agree !!! \o/
No, back off! I want him to design a Tugboat that can retrieve half-sunken RC boats and float planes. My priorities are first. 😂 lol
That with carrying some type of droppable load
As a sailing coach, RC model yacht enthusiast, ardupilot hobbyist, and autonomous yacht designer, I would like to commend you on your great and accurate explanation of sailing physics.
Your boat likely won't tack because the wingsail is back winding (creating reverse thrust) during tacking. Your best bet is to reduce friction in the rotating mechanism, design the rotation point the right distance ahead of the center of effort, and set your wingsail trim tab to 0 degrees during a tack.
That and because he’s using a symmetrical airfoil, it requires high angles of attack to generate inefficient lift, he needs an articulating or hinged wing like the Americas cup boats have to set up a non-symmetrical airfoil depending on wind direction.
@@BikingVikingHH a symmetrical wing at 0 AOA should have far less drag than a flapping sail. Should tack easier.
@@BikingVikingHH Well, this airfoil is pivoting almost around its center of pressure, while a normal sail is hanging behind the mast that it's turning around.
And he has just one airfoil, instead of two. If he has two airfoils, one more at the front of the boat, and one more to the rear, then he can use them to steer.
@@bizzzle1258 a symmetrical wing at zero angle of attack generates zero lift, which is what propels a sailboat, not lack of drag, so while it may be more streamline while tacking, it will lack the propulsion to generate the speed to do so.
Pouring lead into resin was surprising, I would never thought that would work!
lead's melting point is incredibly low. I used it as a kid for building small scale trebuchets.
@@snowe.. I also poured quite a bit of lead, but never thought about pouring it in resin
That was truly unnecessary. He should have just put lead shot in there. The 25% hit in packing density is not a big deal in this situation.
Now he's got not only the exposure during the pour but the contamination and cleanup to deal with.
He should use depleted uranium for keel. Joking.
Excellent job! For a Newby sailor/designer you’ve covered a lot of bases using advanced solutions. Having the small recovery thruster was brilliant.
I don’t care if it’s a plane or not. As long as it’s rctestflight, it’s good!
I don't know about everyone else, but I always appreciate longer videos.
Regarding the wind helm setup: it's also a performance thing. In many boats there are adjustments that can change where the center of pressure is. Tuning for wind helm requires that the rudder is constantly pivoted, and when that AoA is combined with the keel, they combine to form an effectively curved airfoil. When done correctly, it's possible to prevent the boat from sliding sideways due to the lift generated.
This may not be the case at RC scale, but it was something I worked a lot to tune in C420s, where it can be a huge advantage.
Interesting... 🤔 At what wind directions does this work best? (i.e. give the most noticeable effect)
And what kind of adjustments do you use? Do you like pull the mainsail tighter than the foresail, or do you adjust the surface area of the sail?
For the dinghies I have sailed It's done by moving the mast foot, hinging the whole mast slightly back and forth.
Oooh autonomous sailing… that’s crazy!
No, it's not. Such vessels can go around the world. There is more wind than solar or diesel.
I love how enthusiastic you were about the revamped boat and how unimpressed your friend sounded 😂
The video turned out so well! That's an awesome description of balancing the centers of effort and resistance. It was super cool to see you guys at the park!
I’m from Seattle and I love how your videos always show off the natural beauty of the city and surrounding water!
‘I don’t know a lot about sailing’, then goes through moderately involved aspects. The smaller scale physics are interesting
I guess that should have been "I didn't know much about sailing" he seems to be a quick learner though, and when he gets something wrong, he takes the time to learn why and how to fix it, I'd have him as crew on my boat.
rctestflight casually arriving at a design for an unmanned marine kamikaze drone
As if no one's done that. >.>
@@rickhobson3211 ;)
ah yes, a torpedo
I feel like 99% of RUclips RC anything could be used to great effect as a small weapon suicide drone.
@@Gaming1DogeTorpedo, that costs 500 times less, has unlimited range, needs no human guidance and makes pretty much no sound.
I think, he needs to make a simple, normal Rc sailboat and go from there. The hull doesn't seem very efficient, and whilst it isn't meant to be a race boat, speed is the byproduct of an efficient, low drag hull. If I were you I'd make the wing out of printed ribs and a film skin like with RC planes, the CG still seems too high in my opinion, better, but still high.
I don't think the hull is super bad, but it would certainly be on brand to build several hulls, and use an autonomous tug to pull-test each design to find the best one
Investigating a planing hull would be interesting, Vs a VSV Vs something off the shelf (one old and one modern design) @@2testtest2
It’s insane how far this dude has come. I remember watching all his old RC plane videos. Great content
I built an ardupilot autopilot setup for my 22 foot sailboat! Works awesome! Only took a 120kg servo!
Would be great to see a video on that
65 years ago I build sailboats that had walnuts for the shell, 2 toothpicks for mast, and clear plastic for the sail, and it was held together with model cement. After a rain there mud poodles that I could float the boats. They were good with the wind!
So Cool.
The tack problem is with minimum tack speed, it's kinda a known thing in less-complicated sailboats. Basically you can sail at a sharp (into the wind) angle all you want with any speed that gives you, but to tack successfully you got to 'fall off' (with wind) and reduce the attack angle to pick up speed. Basically, a setting in the pilot to forbid tacking if speed less than minimum, and it should do it. (Also in situations when going into the wind and the sail is going on a very sharp angle to the water, there's the old friend GROUND EFFECT, at least with cloth sails, sends greetings ;) )
Ah, do you know that battened sails can protrude before the mast, which has certain advantages, but also gets you in trouble tacking in strong winds, while gibing gets less dangerous? Traditional sails have developed for good reasons, and doing things different is very interesting, but you WILL encounter some surprises. Steering a sailing boat is an art, if you want to win races, you should know an amazing amount of theory and apply it all at the right moments. Example? An old man is sailing passed you, and he says, hey dude, your entire sail is TWO inches too low, simply hoist it a bit. You'll get faster!
@@voornaam3191 it’s so true, I used to race lasers in a pretty windy area of northern California so I’d always keep the sales as tight as possible because I’m a tall guy and could hang off the boat and really generate lift, but when I moved to San Diego I would rent larger sailboats and putt around in the breeze, one day as you described an old man sailed past me and yelled out “loosen up your sail a bit!”… I did and picked up a good .5 - 1 knot.
Woot woot, new video! Thanks for the consistent great content! Love your channel!
Super cool to see a video of you going through all of the unique challenges that sailing presents! As a lifelong sailor and big fan of this channel it was awesome to see. Just as a note, you would probably do a lot better having an actual symmetrical NACA foil (i.e 0015) section for your keel and rudder. These would actually generate lift and allow the boat to point much higher (sail closer to the wind). Also, when your CP is aft of the CLR, that is called "weather helm" not "wind helm" but that is a very minor nitpick. When the CP is forward of the CLR that is referred to as "lee helm" and is undesireable as you stated. When the sails are trimmed so that the CP and CLR are perfectly aligned, the boat is said to be "balanced."
1:50 "Of course, those were way overKEEL as fasteners...." Genius 👏
Most well designed racing sailboats can point as high as 30⁰ into the wind. But this little boat is very cool!
This is super cool to see. I'm currently building an ASV for a university project and your videos are super helpful in guiding the process
While I have zero interest in building or sailing an RC boat the mechanics are great! Amazing video I really love the detail and trial and error
On my little catamaran the gib ( the little sail in front of the mast) makes it way easier to tack it pulls the front around . You can buy old catamarans for cheap like $200 you could do an automated overnight stay would be cool. Love your videos
Omg I love this! I'm a huge sailing fan, and I've wondered if this was possible ever since the first autonomous boat video. I'm super excited for the next explainer and the long range trip. Great work as always!
your approach, attitude, and optimism are inspiring. You are a treasure bro
Another great video from rctestflight! Thanks for the infotainment and I'm looking forward to seeing more of those props being tested!
Now all we need are some foils....
Heh. Just watched some of the America's Cup coverage from Barcelona. The new AC42s are insane!
Agree
Could you do an autonomous foil boat please ? That would be amazing ! Great work btw thank you so much for sharing :)
Amazing work with the CAD models, aesthetically pleasing
I'd recommend bismuth for the keel. It's non-toxic and still has a fairly low melting point. It's more expensive than lead, though.
I appreciate your design process.
Your problem with a wing sail is it is symmetrical, requiring high angles of attack to generate inefficient lift, which will prevent it from being able to sail upwind. The wing sails of high-performance sailboats, like the Americas cup boats, are articulating or variable geometry wings, so that the Airfoil can be adjusted depending on which side of the sail the wind is coming from.
true but symmetrical wings are still very efficient compared to fabric sails.
@@Okamika44 is that true? My hunch disagrees 🤷🏼♂️
@@Okamika44 This would be a very interesting thing to test in the real world
I love sailboats, please do more!
I love this channel. I don’t mind the slower upload schedule, the videos are really well made and I understand it takes time to build your projects so there’s no way (imo) that you’d be able to do 3-4 uploads a week. You seem to have a “the good old days of RUclips” vibe to your channel, when it was a bit more just enthusiasts making videos at home of things they like. Interested people are interesting, and you definitely make some really fun videos. I’ve used a lot of your projects as inspiration for my own builds. You have taught me a lot of new concepts.
Could you do a video on 3D modelling? You often design and print parts, but can we see that process in more depth? Like a “I seem to need a part 3D modelled and printed. This is step by step how I figure out what I need and how I make it” type of video (maybe a 2 or 3 part series? Pretty please). I know there’s a lot of 3D modelling/printing videos out there, but you could provide some good perspective of a rc / drone prototyper type person. What filaments work best for props? What ones for hulls? What are some limitations that us RC enthusiasts would run into? That type of thing.
Anyways, keep up the good work. I really like your channel and projects, I always get excited when I see you’ve uploaded something new
That was a great video! So interesting to learn about the intricacies of sailboats.
This is all very awesome! There's a company called saildrone making stuff like this and they also use a foil. It's obviously a lot easier to implement, but ask any sailor and they will tell how much faster you can go with properly trimmed sails. I can imagine maybe a full size cargo sailing ship using robotically controlled airfoil adjustments.
I imagine you could get this thing to traverse oceans if you figure the battery efficiency out.
My favourite series of yours! Can't wait for longer missions
I recommend changing your wind vane to be a ring with a little fin on it.
This way you can balance it to be in balance in any orientation, giving you accurate readings.
I've been waiting for this!
Been meaning to try this for so long.
Great Video. Thanks!
Ever since the Banana Slug video, Daniel has never underestimate the power of keel 💪
This was super cool!
Fascinating as usual sir!
Excellent progress. Great graphics and explanations in this video. A summer sailing series would be cool. Looking forward to seeing you dive in to Ardupilot details explaining how it's setup and sails.
Really funny to see you go through the exact same issues and solutions with the keel as we did when we built Rapidus V1, great improvements on the project though!
Really sweet build man.
Sailboat keels are sometimes filled with lead to weigh it down. Keels are meant to act as an underwater foil to counteract lateral motion, but also function as a counterweight. If the shape is correct the first function is satisfied, but you probably need more weight to counteract heeling and rolling.
Should have watched a little longer haha
On Lake Union there is the Center for Wooden Boats, where you can rent sailboats and train.
Sorry for annoying you with the hydrophobic propeller in the contest lol, I figured you'd talk about surface area to put all the goons requesting it in place. Was happy to see you include it anyways!
Nice work, well done!
Awesome build.
I love your boat videos! Keep it up 👍
Was expecting part 2 of the prop vids. But this was a pleasant surprise. Great vid.
as an old salty grouchy grumpy sailor this made me smile! in the next video: magnus effect sails. you know you want to.
It's amazing what Ardupilot is capable. Love your videos, my fellow earthling.
guys wake up another rctestflight video was posted.
brooooooooooo
Be original
@@Very_Grumpy_Cat wat
@@Very_Grumpy_Cat name checks out.
But no rctestflight song for a while now to come along with. 😭 Loved those
awesome! I really like how cool it looks lol... Kinda makes me want to build my own and I think more of us feel the same. Your videos are very inspiring
As someone with both sailing experience and an aerospace engineering degree, I feel you did a fantastic job explaining what you’ve done here and did most of the design changes that came to my mind from your alpha model. I have to say, fabric sails are so much more satisfying than rigid wing but I see why you would avoid them here.
The elevator seems rather inefficient, maybe experiment with controlling the mainsail angle using a servo directly? or potentially a winch and string, like a real boat, but that might be more difficult to set up.
Damn was hoping for the next propeller test video
Sailboat video! Sailboat videoooo! Let’s gooooo!!!
I think you need a slightly bigger hull and sail, a surfboard-size boat would be cool, GREAT work !
One of the most advances autonomous sea drones use a similar sailing approach. They are quite impressive and indestructible to any weather condition. The best way to move without using electric power (beyond electronics which it use PV for that).
The sail boat is back!
I would be really interested to see how a canvas sail compares to the foam wing sail in terms of performance.
❤ Awesome as always 😊
@7:45 another factor to consider is that the hull is an airfoil too. With no wind it is a symmetrical foil, however when it starts to lean over the foil in contact with the water becomes asymmetrical. In kayaking we call it edging and use it to turn a kayak without a rudder or paddle.
Small suggestion. If you have a thin pole with a flag or some thin fabric on top you will be able to see the wind direction
That wind helm will also help a bit with your tacking issue.
Super cool !
I’d say the best change you could make is to lose the control flap on the sail and the free rotating mast and servo control it instead so you have more direct control of the sail angle
Also a dual element wing is infinitely more efficient and powerful
You would be able to program set angles to optimise for apparent wind and heel angle and rely less on the reaction feedback.
The fluttering back and forward is killing the drive of your sails
Daniel, you are so smart! And what I find impressive must be different from what you find impressive. Everything you do is impressive! Please don't forget that! 😊
With your ground effect and foil work, using a hard sail you're really on the edge of inadvertently creating a SailGP F50 craft and those can actually travel faster than the wind.
I heard everyone from here, and yes they do.
If you can adjust the aggressiveness of your tack then that might be worth testing.
A lot of new sailors will naturally want to make a gradual turn into the tack. This is something they have to learn not to do. You want to turn sharply and confidently into your tack. The more time you spend with the wind hitting you in that 90 degree no go zone, 45 degrees to either side of directly into the wind, the more speed you lose. Eventually losing enough speed that steering stops working.
The fix for this is to make sharper/quicker turns so that you have momentum to finish the turn through the dead zone and you aren't trying to sail 'in irons'
Generally it's better to overshoot your tack compared to undershooting. As long as you aren't in irons you can correct your course once out of the tack maneuver.
Well done. You are becoming a sailor, learning the fine points. I hope you get out on the water and sail yourself.
So cool!
Awesome!
Awesome video as usual - can’t help but wonder if there’s a world in which the love of autopilot meets the love of hydrofoiling and you create something that takes on some of the lessons of the Vestas Sail Rocket 2. I think it would be one hell of a project!
An new rctestflight video = good day
This is so cool! 👍🏻
This is so cool! 👍🏻
Sailing boats naturally turn up wind when they lean over because the thrust from the sail is now beside the hull centreline and the keel(drag) is on the opposite side of the centreline.
Good stuff. Experience with ARDPilot, 107 certification, and some drone flying experience gets you a 6 figure Drone job here in the Atlanta area. Thats more than I have made in many of my 135 flying gigs. Those drone employers are real estate and cinema companies.
you dont do people sized stuff often, but a try pedalled fixed wing hang glider with very large slow high surface area lift
Forget the peanut gallery and keep doing what you enjoy, and respect for your choice of sponsor, keep up the gresr work!!!
If you are ever in need for some real good quality kit you should try EPDM pond liner kit. It is non toxic for aquatic life, and it is far much stronger as regular silicone kit, and it can cure on wet surfaces, and it is UV resistant, and it sticks to pretty much any type of material. Just don't get it on your hands because it can only wear of your hands again. It really is that much better as any type of silicone kit.
I made a pond from several plastic bins, and I connected all of them together with a large enough diameter PVC pipe so that the fish can swim around, and I used EPDM pond liner kit to seal all the connections, and that was about 20 years ago, and I never had a single leak. The kit is also useful to make electrical components waterproof, but once the canister is opened you cannot keep it forever, and it is a bit of a hassle to apply. Plastidip is also very useful for making ICB's waterproof and that comes in a similar can as paint, which you can store longer, and it is much easier to use. Just dip the ICB in the can, let it cure, and you are done. 👍
Good to see the progress with this iteration. You'll significantly improve upwind performance if you give the keel a (symmetrical) airfoil shape rather than being a faired plank. The rudder would benefit from this too, it then wouldn't need to be so big and would create less drag. The rudder will usually be at some angle to the centreline while sailing, and it needs to create lateral 'lift' to hold the course. Having a flat rudder means it will need more angle and create more drag, like trying to fly with a flat wing.
I love this channel.
The majority of your projects focus on efficiency or autonomous missions which is awesome and I love watching them, but there's always a part of me that really wants to see how fast you could make something. Like this sailboat, or the propellers you are testing, another boat, etc. Just for even one video it'd be fun to not care about efficiency and see what is the fastest you can build. Trying to optimize it for speed and nothing else.
The close haul (up wind) is impressve, especially without a jib or a genoa (head sail) which creates most of the power. It's difficult even in a real sailboat to tack, and a jibe is dangerous in a real sailboat.
well done 👍
"waterproof electronics storage container" well shoot, I've been keeping leftovers in mine LOL
For someone who doesn't sail you're doing great.
Very cool! If anyone is looking for rc sailboat details, look up the "International One Meter" or IOM class. Loads of videos, class specifications, rules etc. Tacking can be hard. Try for fast turns, but not so fast you stall the rudder as it sails through the water. Maybe experiment with max servo speed and endpoints? I'm not a pro, just adding my comment for the algorithm.
I'm Long range fpv airplane guy , but i like this content a lot . I can still see fpv parts :D grate video.