How I built a Plane Powered by AIR

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Tim Station

Tim Station

7 ай бұрын

Main Channel Video: • Flying a Plane Powered...

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@qihengng5993
@qihengng5993 7 ай бұрын
Man saw reaction channels taking off and decided to react to his own contact lol
@MichaelTeeuw
@MichaelTeeuw 7 ай бұрын
Love this format. Please keep doing this. 👍🏻
@Hookmodo
@Hookmodo 7 ай бұрын
Meta as heck!
@VvDiverDownvV
@VvDiverDownvV 5 ай бұрын
He can call it an In Depth Review and avoid the reaction stigma altogether
@Digitness
@Digitness 5 ай бұрын
It’s because he can break down the whole episode with extra information into an optional long form video so viewers can get behind the scenes and the process of making it
@fluppet2350
@fluppet2350 4 ай бұрын
The fact he snubbed his own sponsor bit made it even better
@maxonheadrick9339
@maxonheadrick9339 7 ай бұрын
I unironically re watch your air engine series frequently. Every time there's a new video on one i watch it twice in a row and then in a couple days maybe again. Always a childhood dream of mine, no other entertainer has gotten me to re watch videos on KZfaq. So longer vids with deeper breakdowns are super appreciated :D
@owengrossman1414
@owengrossman1414 7 ай бұрын
The adverse roll that you described isn’t strictly speaking due to having a vee tail. It’s due to having the control surfaces above the the roll axis. If you rake the tips of the vee downward then the roll will coincide with the yaw. The same holds true for a conventional rudder.
@eannacoleman957
@eannacoleman957 7 ай бұрын
Liking it so he sees
@meatcreap
@meatcreap 7 ай бұрын
I loved this format! Please do more like this in future!
@Clickmaster5k
@Clickmaster5k 7 ай бұрын
I agree with this.
@richardamiss7000
@richardamiss7000 7 ай бұрын
Agreed. Fun format.
@terraincognitaband7273
@terraincognitaband7273 5 ай бұрын
I like these "honest" comments, like how it took ages to drill those holes and stuff. In Normal KZfaq-Formats everything can look so easy and fast. But reality is often way more stressful. It brings you back to how things actually work.
@tomw9078
@tomw9078 7 ай бұрын
About the bottles - if you are going to revisit gluing/sleeving two of them together, what if you used a balloon on the inside to prevent leaks? Similar to how a bike tube holds the pressure but the tire stops it's expansion, the balloon holds the air (no leak) and the bottles simply stop the balloon from exploding? I imagine the issue then would be shift to making a seal that doesn't rip the balloon - but it would be interesting to see if allows you to shave some weight! You'd also get a really good visual of how much pressure is left in the bottle as you fly as the balloon deflates. Awesome project! keep it up!
@Araye
@Araye 7 ай бұрын
additionally, he could build a much more streamlined fuselage with cartridges, reducing drag as compared to flying 2 liter bottles around.
@jean-micheldupont1150
@jean-micheldupont1150 5 ай бұрын
@@Araye A small carbon bottle designed for paintball / air rifles would be perfect as it can hold up to 4500 psi. Now I want to try that but I doubt I will have the patience and skills to build it haha
@Araye
@Araye 5 ай бұрын
@@jean-micheldupont1150 if one person can do it, so can you. all you need is the desire. with desire, all things can be overcome.
@mq1506
@mq1506 7 ай бұрын
The larger sizes of disposable CO2 canisters are more efficient in terms of energy/weight if you ever want to go that route. I also suspect you could also save some weight by switching to a smaller battery, maybe even a non-rechargable battery (two lithium coin cells). Don't need a lot of power for just the servos.
@OpreanMircea
@OpreanMircea 7 ай бұрын
servos..., I tried running 2 servos from a 5v small power bank and the safety always took over and cut the power for a fraction of a second, I didn't think to add 2 small lithium cells in series
@nathandavis5021
@nathandavis5021 7 ай бұрын
I think the profile drag would be much lower, the diameter of the soda bottle is much greater than the CO2 cartridge. I guess it would be difficult to actively regulate the high pressure coming out of the cartridge without adding more weight though.
@attilaschneider712
@attilaschneider712 7 ай бұрын
One more thing regarding Co2. The final conclusion was that it contains half the amount of gas than two 2L pets. But the Co2 much denser than the air so assuming the expanding gas reaches the same velocity it should have 1,5 x momentum. So maybe smaller cylinder would provide the same power therefore less gas exhausted per cycle = longer run
@ZachAR3
@ZachAR3 7 ай бұрын
The issue is even with the denser air it depletes around the same weight by design of the engine and the actual amount of air stored is drastically less, such that it would still just be plain worse than the bottles. @@attilaschneider712
@Scou73r
@Scou73r 7 ай бұрын
​@@nathandavis5021 I think the current design has some reduction built in, but even with a new independent reduction valve, it would most likely make up for difference in drag. Not to ment improved "fuel" would almost certainly make up for the extra weight of a pressure reducer.
@PlaneAwesome
@PlaneAwesome 7 ай бұрын
The bit about the propsaver not working as a result of the prop being used as a flywheel - didn't realize it would cause issues, but you explained it really well. Thanks for the deep dive!
@andythebritton
@andythebritton 2 ай бұрын
The air-powered plane series has been a fascinating watch and this commentary augments it well.
@Alexandros11
@Alexandros11 7 ай бұрын
Excellent video, and I absolutely loved going more in-depth into the topic. Please make more of them, and continue working on the air powered aircraft - it's probably my favourite KZfaq series. Experimenting with multi-engined versions, air tanks in the wings, pusher props might be cool ideas for the future.
@dondakin6788
@dondakin6788 7 ай бұрын
Thank you Tom, I really enjoyed the director's cut it answered all my questions.
@AlecThilenius
@AlecThilenius 7 ай бұрын
The Bonanza is a common piston plane, it too has a v-tail and wobbles around in flight just like that. Pilots refer to it as the "Bonanza Boogie". I had that exact thought when watching your original video lol. Your engineering is really fantastic man, I hope you're super proud of what you built!
@Peterchen81
@Peterchen81 7 ай бұрын
Hey Tim! Judging by the noise output of your engine, have you thought about a 3 cylinder design for high, medium and low pressure expansion. This had been done on steam engines. Thank you, love the content!
@Acamperfull
@Acamperfull 7 ай бұрын
Great explanations and so much fun to see, but I think the difference between a CO2 cartridge and the compressed air bottres is smaller because when the motor stops there stil is at least two liter left inside the bottles and the motor does need some pressure to do any work so it is more than that, compared to the very small volume of the CO2 cartridge so very little gas is left unused. Also the CO2 being a liquid compressed should have a more constant pressure output as the bottles with air and the smaller volume create less drag in an airplane. However an engine that runs on compressed air tanks that you can simply pump up yourself so much cooler than an engine that runs on disposable CO2 cartridges.
@meatmanek
@meatmanek 7 ай бұрын
I haven't done the math, but I think the fact that the CO2 is starting at a much higher pressure means the energy output is much greater. Your engine would need to be designed to operate on 800PSI to take advantage of that; I think a pressure regulator basically burns off the excess energy as heat. (I do agree that being able to use your own air is cooler than buying CO2 though)
@swaggington
@swaggington 7 ай бұрын
These additional videos are great Tom! Thanks for taking the time!
@AerialWaviator
@AerialWaviator 7 ай бұрын
This a great directors cut, engineering insights production. Really enjoy seeing this. For the wing leading edge, you might consider using foam cut with a hotwire to make a very thin sheet, or using thing depron. @JuliusPerdana is a RC depron plane crafter. He has many good techniques and videos. eg: "How to bend depron - polyfoam using tape and heat gun", or rolling over a pipe to curve to shape. You could also experiment by increasing rib spacing; particularly behind the spar tube. Another possibility is tacking a strip of paper to the film (with dabs of heat) which could replace the balsa. You'll likely need to apply a heat activated spray adhesive like 3M Super 77 to get the paper to adhere to the ribs. This would allow you to apply the film in the same manor while reducing weight. Hopefully this gives you some alternative ideas.
@dgkimpton
@dgkimpton 7 ай бұрын
I definitely loved the extra technical insights, wouldn't object to having the extra detail directly in the main video to be honest.
@hunbun101
@hunbun101 7 ай бұрын
it’s been awesome to see this project progress through the years and all your innovations👍
@kenkingsflyingmachines2382
@kenkingsflyingmachines2382 7 ай бұрын
For what it's worth, this is the most interesting thing I've seen all weekend. I also went back and rewatched some of your old ones. I discovered that I have an Air Hogs I bought new. One set of wings and tail are still unused. It still holds pressure and runs, so I'm going to fly it when the wind stops howling. Thanks for the brilliant content.
@bob2859
@bob2859 7 ай бұрын
"Developer commentary" works well for the things you make. I hope you keep it up!
@johnnymaynard299
@johnnymaynard299 7 ай бұрын
Awesome stuff Tim. Thanks for taking us on your adventure !
@smg950u
@smg950u 7 ай бұрын
Even that tiny detail about the Discus gliders was a crazy rabbit hole, thanks!
@bjornlofving7238
@bjornlofving7238 7 ай бұрын
Thanks for sharing your ideas! I wonder which Raynolds number you are calculating lift curves for. In fact I think you should calculate for R=50000 because of low speed and short cord. Then Naca 4412 is not good, see airfoil Tools. A lot drag which increases sink. I would go for Göttingen 269 instead. Compare and see for ncrit=5 and 9!
@1kreature
@1kreature 7 ай бұрын
A trick I used to avoid the last rib of a wing buckling when tensioning the Monokote is to add a sideways rib to it. This also serves to round off the wingtip and can also add a small angle to it as well as taper the shape.
@Kozzado
@Kozzado 7 ай бұрын
I really like this more detailled sort of reaction video. Would love to see more in the future.
@DveSedmicky
@DveSedmicky 7 ай бұрын
Hej Tim, great video as always, your air-engine series is great :) I am wondering about one thing : the CO2 cartridge isn't as as bad as originally presented. It has a smaller potential air capacity, but also considerably lower drag compared to the bottles. Do you think that lowering drag could outweight a smaller total output? You could even build a flying wing, integrate everything.
@mcspikesky
@mcspikesky 7 ай бұрын
No. The gas pressure is too high and it cools as it releases.
@redoxee
@redoxee 7 ай бұрын
I think your air engine videos are my favourite, seeing the itteration is facinating!
@chinleybrewer
@chinleybrewer 7 ай бұрын
Really enjoyed watching this to get some of the thinking behind things - definitely good to see more of these :-)
@kwankunghkg
@kwankunghkg 7 ай бұрын
Enjoy very much listening to your detail explanation. Love flying objects, especially VTOL. Thank you Tom 🙏🙏
@hoyschelsilversteinberg4521
@hoyschelsilversteinberg4521 7 ай бұрын
Just before you released your previous video I had watched your entire air powered engine series almost every day for a week straight. No idea why but I was insanely obsessed with it. You have a great video style.
@britzwickit
@britzwickit 7 ай бұрын
such a cool series. thanks for the additional insights!
@yodaiam1000
@yodaiam1000 7 ай бұрын
It is always interesting watching people design and build AC. Your projects are always creative. My two cents worth, I would suggest "stick" framing the tail. It is much stronger, lighter, cheaper, and faster than drilling all those holes. I would suggest using balsa over the entire last panel (from leading to trailing edge) at the wing root and tip. You can get rid of the carbon rods and not have the problem with the warping on the end ribs. You get the bonus of a torsionally stiffer wing root. To save weight, you could also have a half panel instead of a full panel at the root and tip and use half the balsa. Although I love the aesthetic of the V-tail, you are right about the adverse roll when turning. Keep up all the interesting projects and videos. I am really interested to see how your design advances.
@970357ers
@970357ers 7 ай бұрын
Dropping the ‘head’ of the engine so a more direct flow out of the bottle might help with gas flow, although would result in an offset crank. PS. Some destructive pressure testing of a few bottles would give you a better idea of what pressures can be achieved.
@crackedemerald4930
@crackedemerald4930 7 ай бұрын
Should be in slow motion to see the condensation forming and leaving
@alisioardiona727
@alisioardiona727 7 ай бұрын
Great format ! Keep it going
@thecaptainnoodles
@thecaptainnoodles 7 ай бұрын
i really appreciate these videos that help explain things in more detail so thanks :)
@amazingdiyprojects
@amazingdiyprojects 7 ай бұрын
Well done! One thing you might want to modify if you ever give it a go again: "A wing with a chord-wise cut through it tends to behave more like two lower-aspect-ratio wings flying in close formation. The ends of the gap act like wingtips and shed their own tip vortices. If an airplane has significant gaps at the wingroots, it effectively has two low-aspect-ratio wings instead of one higher-aspect-ratio wing. This will cause the wing to have a very low span efficiency and high induced drag. The gap size required to cause this effect is relatively small, and it is much more important to seal chord-wise junction gaps than any other type of gap on an airplane." All the best/Axel
@manfredruhmer2517
@manfredruhmer2517 7 ай бұрын
Absolutely right. The Performance will increase signifikant. Lets say other 30 Seconds..
@JonnyTsunami728
@JonnyTsunami728 7 ай бұрын
This was great, Tom. Please keep doing these.
@TDOBrandano
@TDOBrandano 7 ай бұрын
The adverse roll on the V tail is probably the main reason you don't see it used much on gliders, where the tail tends to be more slender and wider. An option would be to go to an inverted V tail, but this makes it more vulnerable on landing in the grass.
@terraincognitaband7273
@terraincognitaband7273 5 ай бұрын
actually that arrow - screwdriver was genious.
@julianpowers594
@julianpowers594 7 ай бұрын
Bro 4412 is way too thick for such a small and slow plane. Try AG34, AG35, AG36 like on the 2m Allegro. Keep in mind that the 60:1 L/D is the idealized 2D value. Even the best to planes at this scale only get ~20:1 3D L/D Also best way to save weight on the tail is to use the lightest 3m balsa you can find and sand an actual airfoil profIle. You can cut the balsa weight nearly in half while retaining bending stiffness. I can’t tell if you left the LE square but if you did the air is probably immediately separating from the tail which gives lots of drag and reduces control authority. Nice work I really enjoy watching your vids!
@aviphysics
@aviphysics 7 ай бұрын
In the US, you can sometimes find 3 liter soda bottles like that. Maybe something to look for.
@IdRatherBeMaking
@IdRatherBeMaking 7 ай бұрын
Could you repurpose the one way valve from a football and fill it with an inflation needle? It looks like you can pick them up cheaply. It would also make filling and disconnecting easier.
@dimml0r
@dimml0r 5 ай бұрын
yeah i agree with the idea that i would not go so much for weight but starting to focus on a more aerodynamic fuselage
@surfacta
@surfacta 7 ай бұрын
25:53 drilling holes and adding covering film might add sort of craters on its surface, which might form turbulent air and adding drag
@darthgbc363
@darthgbc363 7 ай бұрын
Maybe keep the bottles intact & add a hose from rear cap to engine. This might weigh a bit less than the nylon bolt. Also, the rear bottle could face forward.
@keysimfr
@keysimfr 4 ай бұрын
Love it, please do more, your video on your main channel are too short for me, I love more details and anecdotes !
@ooooneeee
@ooooneeee 7 ай бұрын
I love the original video and this reaction with background info is chef's kit ❤.
@Kangsteri
@Kangsteri 7 ай бұрын
You can melt acryl with acetone to make good glue for plastic.
@KingJellyfishII
@KingJellyfishII 7 ай бұрын
I'm really really interested in your design process of the wing ribs. Did you just draw up a shape that looked right or is it the result of careful calculation?
@markrichardson2508
@markrichardson2508 7 ай бұрын
This is like a directors commentary I love it
@CodeF53
@CodeF53 7 ай бұрын
Appreciate the breakdown
@iwanta69rs
@iwanta69rs 6 ай бұрын
Air Hogs! used to love playing with them as a kid they used this same principal!
@Zardwark
@Zardwark 7 ай бұрын
Definitely would like to see more like this. Also, any chance of the .STL files for that bottle cap/valve arrangement? I have an idea in mind that it would be ideal for.
@joshuafoster8976
@joshuafoster8976 7 ай бұрын
Could you take some weight out of the piston skirt too? Is it possible to print a bottle with isogrid ribs to hold extra pressure and streamline it? Or even take the c02 canisters as it will drastically reduce frontal area?
@HomeMadeBoards
@HomeMadeBoards 7 ай бұрын
5:39 hold the pieces up to a light and look for any opacity in the backing. Or Use the same method you did by cutting a small square and stick a tiny piece of masking tape on the side you determine as the correct side (on the larger piece, obviously)
@Joeyzoom
@Joeyzoom 7 ай бұрын
I love the behind-the-scenes review, please continue them! A "fun" note - if you were flying this in the States, you'd need a RemoteID tag before takeoff. Include that in your preflight checks 😂
@MrSlipstreem
@MrSlipstreem Ай бұрын
Have you considered adding a tuned expansion chamber to the exhaust outlet? It works wonders for 2-stroke engines in terms of increased power output over a narrow rev range. I wonder if it might improve the efficiency of an air-engine too? 🤔
@Cessna165
@Cessna165 7 ай бұрын
When you mention the 60 L/D, you're surely talking about the airfoil, right? 60 L/D for the wing seems like a very high value even at stall.
@Dennio83
@Dennio83 7 ай бұрын
This is where the "Tim Station" norm was born and I'm very proud to say that i was there!
@valeriyproklov2868
@valeriyproklov2868 7 ай бұрын
A major efficiency gain could be had by adding some kind of cover for the inner wingtips, to eliminate those wingtip vortices, or am I missing something?
@StewardsNotes
@StewardsNotes 7 ай бұрын
Oh man, watched that other video earlier and was thirsting for MOAR. Now here ya are!
@MrRishik123
@MrRishik123 7 ай бұрын
with the co2 cartridge, would the reduced drag aid in enough way to compensate for the lower gas contained to weight ratio?
@dadsfriendlyrobotcompany
@dadsfriendlyrobotcompany 7 ай бұрын
I love this format! Have you thought of using glider folding props?
@mechitworks
@mechitworks 7 ай бұрын
added problem with the co2 canisters is that they cool down the co2 considerably as it comes out (adiabatic cooling). this would probably cool down the seals and make the engine not run as well. It also expands less as it is cooler. CO2 is also denser than normal air ~2kg/m3 vs 1,3kg/m3 air but i have no idea what that would do to the engine.
@brushitoff503
@brushitoff503 7 ай бұрын
Yep this was awesome & very enjoyable. Cheers
@lordlardofframs
@lordlardofframs 7 ай бұрын
Great format Tom, where did you get the carbon fibre spare from? I need some thin wall carbon for my project
@deanedeane4318
@deanedeane4318 7 ай бұрын
Awsum !!! I didn't see your previous video (yet) , maybe you could call this a re-debrief video as this is where more learning / ideas are created / realized...... good on you !!!!!! 😉😎
@ioanhill9138
@ioanhill9138 7 ай бұрын
Tom, I think you'd love to visit next years Icarus Cup held in the UK. Many human powered aircraft competing, great for inspiration for lightweight wing structures.
@googlewreckedit
@googlewreckedit 7 ай бұрын
At 17:00 I'm looking at the pin for opening the intake ball and if all is to scale I think you could get more flow if you narrowed the pin below the contact area. Maybe more flow isn't needed or desirable in an air engine though since "fuel" storage is so limited.
@TiagoTiagoT
@TiagoTiagoT 7 ай бұрын
Would the reduction in drag from using CO² cartridges compensate for the reduction in total capacity or would it not be enough?
@nathandavis5021
@nathandavis5021 7 ай бұрын
Have you looked at the S1223 airfoil? It might have higher drag overall, but it has super high L/D.
@skysurferuk
@skysurferuk 7 ай бұрын
Love the deep dive. 👍
@TheCompWiz
@TheCompWiz 7 ай бұрын
You should really try a pump that pumps both-ways. (on the up stroke as well as the down stroke)
@Cam2Art
@Cam2Art 7 ай бұрын
Very enjoyable video. It's a great recap.
@johankotze42
@johankotze42 6 ай бұрын
Maybe someone mentioned it but given the weight of the compressed air, the CG would shift rearwards as the air runs out. Surely that could have a huge influence on the flight characteristics?
@johnnyjrotten59
@johnnyjrotten59 7 ай бұрын
Hi Tim, You should buy carbon Archery arrow shafts - they have all of the specs written on the sides - - wall thickness grams per inch etc..
@emrlmtb
@emrlmtb 7 ай бұрын
You could try wrapping a foam wing in foil for drag reduction
@karellen00
@karellen00 7 ай бұрын
May I ask you why you don't get one of those small battery powered compressors? I have a xiaomi one (the one shaped like a padlock), and it works really well, it has an integrated pressure sensor that tells you how much pressure you have in there, and you can automatically set a maximum. And you'll be more relaxed piloting the plane!
@H.J.B
@H.J.B 7 ай бұрын
I'm sure you thought about this but an A tail is a great alternative to a v tail as the yaw and roll go in the same direction but there is the same weight saving as a v tail. The main disadvantage is having something dragging below the plane. Would be cool to see something like this on the next rendition.
@sebastiannoriega8072
@sebastiannoriega8072 5 ай бұрын
A tail? Ive never heard of that one
@AwesomeThirtyEight
@AwesomeThirtyEight 7 ай бұрын
Did you make any calculations on air drag of the bottle vs the CO2 cardridge? The drag should scale linearly with crossectional area, so a 2 times reduction in "tank" radius should reduce the dragforce by a factor of 4. Don't exactly know how this will relate to flight time as velocity might also increase, but might be worth a test anyway.
@lefaro0034
@lefaro0034 7 ай бұрын
Hey really enjoy this format and the insights into the process you provide with it. Regarding the corrected calculation of the CO2 cartiges (how do you spell that? I'm not an native english speaker): A while ago you built a rotor propelled Rocket, powered by super capacitors. I'd love to see Something similar built with your gas Powered engine and one of those CO2 capsules.
@ColinRichardson
@ColinRichardson 7 ай бұрын
Also, DEFINITELY do these videos again!
@tuberroot1112
@tuberroot1112 5 ай бұрын
How much energy to you recover in terms of propulsion compared to the energy of the compressed air. That printed motor is nice work but does it recover more than just blowing the air out of the back as a simple jet ? Beautiful work on the wings.
@tuberroot1112
@tuberroot1112 5 ай бұрын
Your little piston engine is quite cool but what is the efficiency of it ? How much forward thrust do you finally get back from the energy of the compressed air? Is it more efficient that simply putting a small pipe on the back and powering it like a compressed air rocket ? From the look of it, I'd guess not.
@AL-pv2bq
@AL-pv2bq 6 ай бұрын
Great video! I am looking for carbon fiber spars myself right now, would you be willing to add links to where you bought your build materials in the video description? I would also be interested in using the same covering film...
@carljasonscarfe
@carljasonscarfe 7 ай бұрын
I wish Tim Station could do the director's commentary on everything
@sirkonotor7557
@sirkonotor7557 7 ай бұрын
Just a Idea I got while watching. Have you thought about using the space in the wings as air storage, maybe using 3 layers of plastic film to make a seal and using a hole in the carbon rods as "fuel lines".
@robertosfield
@robertosfield 5 ай бұрын
An inverted V tail would couple the yaw and roll moments, just roll 180's degrees and you should be good to go :-)
@robinsmith5484
@robinsmith5484 7 ай бұрын
Is your Aluminum track with the black rib holders a commercial available jig or home brewed cheers. good video reference carbon tube thickness.
@volofly2011
@volofly2011 7 ай бұрын
Hi Tom, Mark here, thanks for the deep dive. Love it. BTW, I still have one of those Air Hogs planes which I got as an adult 30 years ago. Hanging in the garage with my RC gliders. I saw that DLG on the original video, obviously, and wondered about it so I looked it up. Sadly the website is pretty sparse. Can you provide some details? Like where is this made, etc.
@SnowingNapalm
@SnowingNapalm 7 ай бұрын
37:23 so how an altitude sensor works it makes sense as submarines increase pressure deeper your go you decrease that same stored pressure the higher you go as well as stored fuel temperature vs air temperature that's why your flight characteristics change via altitude (context) reference the combined 2 liter bottles having forces around it acting on it
@cyanyeti1556
@cyanyeti1556 7 ай бұрын
If you did want to use a manufactured part, have you looked at presta valves? I found them to be much nicer to use than schrader ones and for road bikes going up to ~90psi I have not had an issue with them. Not sure if its better for your case though, just a thought
@davidjdriver
@davidjdriver 7 ай бұрын
Rather than using compressed air, could you use a chunk of dry ice? As it melts, it releases a large amount of gas. I’ve seen people make exploding soda bottles with a small chunk of dry ice and throwing the bottle in a pool.
@DoNotPushHere
@DoNotPushHere 7 ай бұрын
Well, the first time I flew mine I got totally convinced of it somehow having a spirit of some sort. I had already had a bad experience misusing and underwinding a professional rubber band balsa plane and I didn't expect this plane to do any better so...I somehow thought it would be OK to fly it close to a bunch of trees. It somehow dodged them all...but the last one :) but it got every neuron of my brain amazed by the power and roaring sound :D I miss it...
@EJ-74
@EJ-74 7 ай бұрын
Very cool, great job 🔥
@liammurray9274
@liammurray9274 7 ай бұрын
with some smart engineering I think you could optimise the bottles further, as you said with the splicing but also just one wrap of carbon or glass fibre sheet, a little resin and I wouldn't be surprised if you can get upwards of 200psi in them.
@piconano
@piconano 7 ай бұрын
I built most of the fuselage and the main wing's spar of a Cozy MK IV from plans I bought back in 1998. It's the 4-seat version of the famous Long EZ by the God of aeronautics himself, Burt Rutan. The first chapters of all his plans are the bible of composite construction. Hot-wire foam cutting done right, is hard to beat. Most flying surfaces of composite experimental aircraft is built that way. The next best thing, would be a CNC mill. If you hot wired two pieces, a leading edge portion to glue to the front of the spar, and the trailing part to the back of the spar, would give the closest construction to the real plane. No need to glass a skin. Just sand and paint to protect the foam against UV.
@nickizzett1896
@nickizzett1896 7 ай бұрын
When the covering film bows inwards between the spars, how much of a difference would that make to the flight performance? I appreciate the NACA profile is different and therefore doesn't give the characteristics that you designed, but would it be un-flyable?
@StuartRobinson123
@StuartRobinson123 6 ай бұрын
what glue are you using between the ribs and CF and what's the benefit of the little bumps inside the rib where it connects to the CF tube? space for glue?
@naveenv4227
@naveenv4227 7 ай бұрын
Just an idea, if you just can design a latch and tension the wing at an sweep angle in climb phase to reduce drag and release the tension were the wing can lock into latch for its max aspect ratio for long gliding time???
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