Man saw reaction channels taking off and decided to react to his own contact lol
@MichaelTeeuw9 ай бұрын
Love this format. Please keep doing this. 👍🏻
@Hookmodo9 ай бұрын
Meta as heck!
@VvDiverDownvV8 ай бұрын
He can call it an In Depth Review and avoid the reaction stigma altogether
@Digitness7 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
@fluppet23506 ай бұрын
The fact he snubbed his own sponsor bit made it even better
@maxonheadrick93399 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
@owengrossman14149 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.
@eannacoleman9579 ай бұрын
Liking it so he sees
@meatcreap9 ай бұрын
I loved this format! Please do more like this in future!
@Clickmaster5k9 ай бұрын
I agree with this.
@richardamiss70009 ай бұрын
Agreed. Fun format.
@PlaneAwesome9 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!
@tomw90789 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!
@Araye9 ай бұрын
additionally, he could build a much more streamlined fuselage with cartridges, reducing drag as compared to flying 2 liter bottles around.
@jean-micheldupont11507 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
@Araye7 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.
@mq15069 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.
@OpreanMircea9 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
@nathandavis50219 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.
@attilaschneider7129 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
@ZachAR39 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
@Scou73r9 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.
@AlecThilenius9 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!
@andythebritton4 ай бұрын
The air-powered plane series has been a fascinating watch and this commentary augments it well.
@swaggington9 ай бұрын
These additional videos are great Tom! Thanks for taking the time!
@Alexandros119 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.
@johnnymaynard2999 ай бұрын
Awesome stuff Tim. Thanks for taking us on your adventure !
@dondakin67889 ай бұрын
Thank you Tom, I really enjoyed the director's cut it answered all my questions.
@hunbun1019 ай бұрын
it’s been awesome to see this project progress through the years and all your innovations👍
@Peterchen819 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!
@terraincognitaband72737 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.
@bob28599 ай бұрын
"Developer commentary" works well for the things you make. I hope you keep it up!
@kenkingsflyingmachines23829 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.
@alisioardiona7279 ай бұрын
Great format ! Keep it going
@AerialWaviator9 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.
@smg950u9 ай бұрын
Even that tiny detail about the Discus gliders was a crazy rabbit hole, thanks!
@chinleybrewer9 ай бұрын
Really enjoyed watching this to get some of the thinking behind things - definitely good to see more of these :-)
@dgkimpton9 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.
@Acamperfull9 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.
@meatmanek9 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)
@britzwickit9 ай бұрын
such a cool series. thanks for the additional insights!
@JonnyTsunami7289 ай бұрын
This was great, Tom. Please keep doing these.
@redoxee9 ай бұрын
I think your air engine videos are my favourite, seeing the itteration is facinating!
@hoyschelsilversteinberg45219 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.
@Kozzado9 ай бұрын
I really like this more detailled sort of reaction video. Would love to see more in the future.
@1kreature9 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.
@CodeF539 ай бұрын
Appreciate the breakdown
@thecaptainnoodles9 ай бұрын
i really appreciate these videos that help explain things in more detail so thanks :)
@StewardsNotes9 ай бұрын
Oh man, watched that other video earlier and was thirsting for MOAR. Now here ya are!
@Joeyzoom9 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 😂
@skysurferuk9 ай бұрын
Love the deep dive. 👍
@brushitoff5039 ай бұрын
Yep this was awesome & very enjoyable. Cheers
@EJ-749 ай бұрын
Very cool, great job 🔥
@DveSedmicky9 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.
@mcspikesky9 ай бұрын
No. The gas pressure is too high and it cools as it releases.
@keysimfr6 ай бұрын
Love it, please do more, your video on your main channel are too short for me, I love more details and anecdotes !
@Cam2Art9 ай бұрын
Very enjoyable video. It's a great recap.
@kwankunghkg9 ай бұрын
Enjoy very much listening to your detail explanation. Love flying objects, especially VTOL. Thank you Tom 🙏🙏
@ooooneeee9 ай бұрын
I love the original video and this reaction with background info is chef's kit ❤.
@bjornlofving72389 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!
@markrichardson25089 ай бұрын
This is like a directors commentary I love it
@1Choclate19 ай бұрын
Very cool moves
@yodaiam10009 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.
@blockhead36549 ай бұрын
Supper cool . Nice work
@amazingdiyprojects9 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
@manfredruhmer25179 ай бұрын
Absolutely right. The Performance will increase signifikant. Lets say other 30 Seconds..
@TDOBrandano9 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.
@terraincognitaband72737 ай бұрын
actually that arrow - screwdriver was genious.
@Dennio839 ай бұрын
This is where the "Tim Station" norm was born and I'm very proud to say that i was there!
@deanedeane43189 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 !!!!!! 😉😎
@970357ers9 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.
@crackedemerald49309 ай бұрын
Should be in slow motion to see the condensation forming and leaving
@dadsfriendlyrobotcompany9 ай бұрын
I love this format! Have you thought of using glider folding props?
@Zardwark9 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.
@dimml0r7 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
@Axion299 ай бұрын
I love your Videos!!!!!!
@ioanhill91389 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.
@iwanta69rs8 ай бұрын
Air Hogs! used to love playing with them as a kid they used this same principal!
@julianpowers5949 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!
@nathandavis50219 ай бұрын
Have you looked at the S1223 airfoil? It might have higher drag overall, but it has super high L/D.
@DoNotPushHere9 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...
@aviphysics9 ай бұрын
In the US, you can sometimes find 3 liter soda bottles like that. Maybe something to look for.
@ColinRichardson9 ай бұрын
Also, DEFINITELY do these videos again!
@MrRishik1239 ай бұрын
with the co2 cartridge, would the reduced drag aid in enough way to compensate for the lower gas contained to weight ratio?
@future-matze-359 ай бұрын
Nice 😊
@volofly20119 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.
@H.J.B9 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.
@sebastiannoriega80727 ай бұрын
A tail? Ive never heard of that one
@valeriyproklov28689 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?
@IdRatherBeMaking9 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.
@KingJellyfishII9 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?
@Kangsteri9 ай бұрын
You can melt acryl with acetone to make good glue for plastic.
@carljasonscarfe9 ай бұрын
I wish Tim Station could do the director's commentary on everything
@dusk2dawn29 ай бұрын
Next: Variable Pitch Propeller
@emrlmtb9 ай бұрын
You could try wrapping a foam wing in foil for drag reduction
@MadScientist2679 ай бұрын
Lol you do the same thing we do with the sponsor slots 🤣
@danielrusbridge41829 ай бұрын
More dlg stuff please 🙏🏼
@TiagoTiagoT9 ай бұрын
Would the reduction in drag from using CO² cartridges compensate for the reduction in total capacity or would it not be enough?
@Cessna1659 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.
@Cinnamon_Shaey8 ай бұрын
villain origin sotry: "lost toy plane on a school roof" xD perfect
@SnowingNapalm9 ай бұрын
Btw good and long video not just a clip ❤😊👍
@ajosepi19769 ай бұрын
I liked this video better than the original. Both are good, but I just like this better.
@shailesh69369 ай бұрын
Waiting 4 your reaction wheel drone since ages😅
@johankotze428 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?
@mechitworks9 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.
@karellen009 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!
@surfacta9 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
@googlewreckedit9 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.
@robinsmith54849 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.
@lefaro00349 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.
@AL-pv2bq8 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...
@darthgbc3639 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.
@lordlardofframs9 ай бұрын
Great format Tom, where did you get the carbon fibre spare from? I need some thin wall carbon for my project
@flyboywbl9 ай бұрын
Could you add a servo to a valve and make a throttle?
@reddcube9 ай бұрын
Could you CNC the wing profile directly into a block of foam and than wrap it?
@piconano9 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.
@miranda.cooper9 ай бұрын
I'm curious if you could use dry ice as a propellant
@TheCompWiz9 ай бұрын
You should really try a pump that pumps both-ways. (on the up stroke as well as the down stroke)
@harrycheung42199 ай бұрын
Thanks for this detailed recap. Who makes that jig at @4:39?
@DYNAMAX_D9 ай бұрын
can you use a toroidal propeller in this build?? , why or why not