Very helpful im self taught never use rudder but now understand the necessity i can't wait to fly rudder now keep up the good work
@sailor0500 Жыл бұрын
Very well explained, Tom. Thanks, Mike.
@crashrr29933 жыл бұрын
Thanks for this. I’m about to maiden a rudder-controlled model glider which has a very low amount of dihedral. I can see now that I will need to keep my turns wide, and be ready with opposite rudder if it starts twitching. Cheers!
@tsukabull16503 жыл бұрын
Get technical anytime you want man - loved geeking out on this video. Beautiful!
@joaquimpedro79172 ай бұрын
Great video, great technical explanation! Thank you.
@marcusbost84812 жыл бұрын
This content helped me understand my stalls/crashes. Thanks
@rcpilots12916 жыл бұрын
Hey Tom, great video thanks for taking the time to explain all the details
@FarmerFpv5 жыл бұрын
You can also add leading-edge slats like I did to my Tundra it's able to fly at a higher angle of attack without tip stalling, but when it does tip stall it even tip stalls even harder than stock no recovery, another thing you can do is add simple wingtip droops out of coraplast but by the time you might aswell get an E-Flite Timber X or a 3D plane lol. Anyway lots of good information in this video I learned a lot thank you for posting it's too bad you stopped posting these tutorials I don't know if it was not enough interest from people if that's the case sometimes that doesn't happen until you do over 20 or 30 of them before you start getting more interest from people, just got to keep at it I would have watched them all you're a great pilot with a lot of knowledge, too bad you stopped maybe you'll think about doing it again. I learnt my first blender from your durafly EFX video then the pop top from you. That's another thing people watch and they don't comment after they learn something which is stupid they should let the person know that their videos helped them. But nowadays everybody our flesh eating zombies they think they're entitled to everything cell phone car College pay for by their parents soon as they get a job they expect a raise after 6 months I don't know about where you live but those kind of people are ruining America and are exactly what ruined Detroit Michigan. Okay that was the longest comment I've ever written on somebody's KZbin channel I at least hope it puts a smile on your face lol
@situbes.9724 жыл бұрын
Thank u for simplified explanation of some fairly complex physics. Tip stall does exist but on model airplanes whether its simpler design or the fact little relative speed difference exit between partial and full wing stalls on planes that its little of significance to rc pilot.
@johanveltheim43316 жыл бұрын
One final thing! Stall is not simply lift not being enough to compensate for weight - it's lift not being enough _when you are already flying at stall angle of attack_. The result is an increase in the angle of attack, leading to a decrease of lift (because now you're past the maximum value on the lift curve), leading to a further increase in the angle of attack and (at least partial) loss of control in a vicious circle.
@bobdegood715 жыл бұрын
Tom - Thanks for the video, it was a lesson that I was looking for and it was spot on with a mix of technical and practical content. I plan to watch more of your lessons on how to be a better pilot.
@TomDeWeerdt5 жыл бұрын
Bob DeGood thanks Bob, appreciate that’
@stellarpod4 жыл бұрын
Really long video? Yes. But, I must say, this is one of the best, most easily understood explanations of stall/tip stall and rudder input (opposite for tip stall, same as aileron for cleaning up a turn) I have seen yet. Kudos to you my friend. Brilliant piece of work! You just earned a hearty thumbs up from me and a subscriber as well. :) As always, thanks so much for sharing. Steve
@TomDeWeerdt4 жыл бұрын
Thanks Steve!
@wmdayman5 жыл бұрын
Thanks Tom, very interesting
@RobisonRacing686 жыл бұрын
Nicely done Tom...
@TomDeWeerdt6 жыл бұрын
RobisonRacing68 thanks Lauren!
@papamidnightfpv2 жыл бұрын
This lesson is awesome
@TomDeWeerdt2 жыл бұрын
Thanks!
@johanveltheim43316 жыл бұрын
Good to see someone explaining (and interested in!) the fundamentals of flight! One thing I didn't notice being covered is adverse yaw. If you ask me, that's what mostly causes your "tip stalls" (which, as you mention, are simply asymmetric stalls, nothing tippy about them). And it's also adverse yaw that causes the aileron input to be counter-productive when trying to correct the situation (as it's usually the thing that caused it). And how do you compensate for adverse yaw and maintain what's known as coordinated flight? Apply just enough rudder whenever you apply aileron input. Unfortunately, that "just enough" is a bit more complicated than a simple percentage of the aileron input - turns out the percentage depends on the amount of lift the wing is generating. Real airplanes do it by a combination of the pilot's muscle memory (learned by staring at an instrument called "the ball" for the first few dozen hours of training) and (with larger planes) automatic yaw dampers. My RC planes do it by incorporating an angle of attack sensor and some simple math (and many test flights to find out the actual lift curve in different configurations). If you manage maintain completely coordinated flight especially in slow flight, your "tip stalls" go away and most planes turn out to remain controllable even in full stall. Apart from that, one thing is worth stressing in my opinion: stall is not a function of airspeed, it's a function of the angle of attack (alpha). And the stall alpha is simply the alpha corresponding to the maximum value of the coefficient of lift (CL). Of course the shape of the CL curve depends on the configuration of the wing (i.e. what your lift-modifying devices are doing) and so can the stall alpha - usually flaps etc reduce the stall alpha (but the maximum CL may obviously still be higher than with clean wing).
@TomDeWeerdt6 жыл бұрын
Johan Veltheim thanks! I know I wouldn’t have gotten away with this explanation during my aerodynamics exam in my airforce days. What I have tried to do is to translate pretty complex stuff into a fairly reasonable explanation that hopefully help rc pilots grasp the basics, so they have some comprehension of what happens when they’re out in the field. Hope I more or less succeeded doing that :)
@johanveltheim43316 жыл бұрын
@@TomDeWeerdt that's a good point, some of the issues are quite complex if you really want to know the answer, most of the time RC pilots can get away with a bit less. I'm just a bit obsessive about my planes flying the way they would if I was aboard flying them with the proper instruments. :D
@micsherwood49305 жыл бұрын
Excellently done
@TomDeWeerdt5 жыл бұрын
Thank you sir!
@garyvale83472 жыл бұрын
great video , as I have been looking for a demonstration on stalls'....I learned to fly last summer, on all high wing 3S type trainers...I recently flew my first low airplane, the HH T-28 ( 1.1m yellow model ) for the first time and all the guys at the field kept telling me to keep the speed up or it will stall....but I didn't notice any bad tendencies when flying it, even in low slow speed turns....I used a 3S and I did not use SAFE at all........... QUESTION: what can I do to prevent a tip stall when turning at low altitude for final approach ...what pre-stall signs do I look for....anymore helpful tips welcome.... ....thanks
@TomDeWeerdt2 жыл бұрын
Generally speaking: - High nose, low tail - low speed - plane getting sluggish on ailerons - wingrock My best tip to avoid them close to the ground would be to fly descending landing circuits, by that I mean starting up high and doing a circuit in one continuous descent untill the flare. Start high enough on a downwind leg and establish your descent there. That way (side view, bit further away) it's easy to visually judge the speed. That way if you maintain the same descent rate with approx the same power you can trust that your airspeed on final desent is OK as well (while beacuse final is more of a frontal view and the airspeed is more difficult to judge visually) When flying a more level landing circuit and throttling off on final to start final descent speed is more difficult to judge and the chance of inadvertently ending up stalling are much higher. Also: Practice your stalls up high, in level flight as well as in turns, and in banked descents. Get to know your aircraft in all those situations so you know what it will be closer to the ground as well. Lastly: Be triggerhappy on the throttle when flying slow, always be prepared to power up and save your ass :)
@notoo72 жыл бұрын
I have tip stalled my Viper 70mm EDF too many times to count as well as replaced the fuselage. I wish I found your video sooner. 😪
@TomDeWeerdt2 жыл бұрын
I think we've all been in that awkward situation where you run out of airspeed, altituide and ideas all at the same time. Hope the video helps for your future endeavours :)
@McLogo766 жыл бұрын
Great video, very interesting!
@TomDeWeerdt6 жыл бұрын
McLogo76 thanks! That was actually a lot of fun to plan and do!
@brucehardwick79282 жыл бұрын
thank u so much , new to rc plmes x
@sufysprojects26896 жыл бұрын
I'm sorry , the lift explanation is WRONG . The particles DO NOT meet up at the trialing edge . Watch this video : aerodynamics : wing camber
@sufysprojects26896 жыл бұрын
I'm not trying to hate , I just want people to get the right explanation on lift
@TomDeWeerdt6 жыл бұрын
Sufy561 i know, studied aboit 600 pages on the subject in my airforce days. Figured this is the easiest way to grasp the concept. Trying to make these video’s as functional as possible...
@sufysprojects26896 жыл бұрын
@@TomDeWeerdt oooh ok , I see the point .But still , that concept is very incorrect. Maybe make a ''correction for pros'' , so that interested people can get the right indormation !
@TomDeWeerdt6 жыл бұрын
Sufy561 have you got good video suggestions? Could put some in the video description for people that want to know more!
Thanks Tom. That's really helpful. I can now visualise what is happening during a stall and which situations are likely to cause it. One more question. What effect does using the flaps have, in relation to tip stalling. Will it increase or decrease the speed at which they occur. Thanks for spending the time to make a very informative video.
@TomDeWeerdt6 жыл бұрын
Chris Edwards well basically those allow you to fly below the “normal” stall speed, on the Tundra they are so powerful because they create lift from the propwind. In my experience with the Tundra the stall doesn’t feel different with and without flaps, in both cases it’s pretty abrupt and brisk, they just occur at different speeds...
@TomDeWeerdt6 жыл бұрын
Chris Edwards making that video was actually a fun process, so thanks for the question!
@51im6 жыл бұрын
@@TomDeWeerdt Thanks. I really feel that I've learnt something from it. Hopefully I'll be able to keep the tundra in one piece.
@TomDeWeerdt6 жыл бұрын
Chris Edwards weather is still Delta Sierra around these part, but I must have plenty of footage laying around, I’m trying to concoct something this week!
@51im6 жыл бұрын
@@TomDeWeerdt No worries Tom. Quality is worth waiting for.
@richosvideos9115 жыл бұрын
Great Video, thanks for posting :-)
@TomDeWeerdt5 жыл бұрын
Why thank you sir!
@engineerahmed72484 жыл бұрын
Warbirds takeoffs/touch & gos r certain killers. 1 u got to give up elevtor to prevent nosing in 2 but up elevator creates early liftoff at slow speed 3. & to top it of creating hi AOA meaning wings have air separation rendering ailerons totally ineffective 4.The instinctive action to stall is speed. So u throttle up but increased motor torque is now countered by nth, creating a severe left unarrested roll. Only if u r lucky u fly away towards left, which r the take offs u get to c, whereas the rest just crash nose in on takeoff stall
@TomDeWeerdt4 жыл бұрын
I think the topic of CG range could help warbird pilots as well. In my experience most warbird pilots feel comfortable with noseheavy planes, not realising that a more aft CG (when staying well within the CG range) would lower the stall speed and make the problems you describe on takeoff less of an issue.
@51im6 жыл бұрын
Hello Tom Would you be able to do a STOL flying tutorial video. i.e. when to use flaps or not and throttle control in different scenarios. Thanks
@TomDeWeerdt6 жыл бұрын
Chris Edwards sounds like fun! Also angood incentive for me to fix my Tundra after a midair 2 weeks ago :) I’ll see if I can do a video next weekend!
@stephencantbewrong82506 жыл бұрын
I am with Chris. I would like to know too.
@51im6 жыл бұрын
@@TomDeWeerdt That would be great. Ps. No video is too long. It's all interesting stuff.
@natnaelalemayehu52614 жыл бұрын
it is a very nice video!!!!!!!!
@TomDeWeerdt4 жыл бұрын
Thank you sir!
@hugonordin2 жыл бұрын
The lift analogy doesn't really make sense to me. Why would the particles decide to "meet up" att the trailing edge. Air isn't conscious so to me o don't get how it would work.
@TomDeWeerdt2 жыл бұрын
If they wouldn’t it would leave a vacuüm, maybe that makes it make more sense. I realise the way I explain has it’s flaws, in my opinion it is however the best way to give people a basic understanding for practical use in rc flying…
@hugonordin2 жыл бұрын
@@TomDeWeerdt could you explain the vacuum thing a bit more?
@engineerahmed72484 жыл бұрын
Roll due to rudder alone is due to another reason too that is RUDDER act as 1 TAILERON. If rudder surface is equal above & below CG as for S Back 360 u get a simple flat turn
@kdr955 Жыл бұрын
Blind leading the blind.
@TomDeWeerdt Жыл бұрын
What was that Big Lebowski quote again? “Well that’s just like your opinion man”… Why so salty?
@kdr955 Жыл бұрын
Not my opinion. Physics/aerodynamics is a discipline where certain things are true or not and it takes a certain amount of knowledge to teach.@@TomDeWeerdt
@kdr955 Жыл бұрын
Why aren’t regular real airplane pilots taught anything about “tip stalls”? Is is just something that happens to models?
@TomDeWeerdt Жыл бұрын
Have you watched the video? Most of the info I got from my own "actual" pilot training :)
@kdr955 Жыл бұрын
@@TomDeWeerdt Me: watched the video Me: 35 year pilot - glider license, CFI, aerobatic instructor, ATPL, ATPL- Helicopter
@TomDeWeerdt Жыл бұрын
@@kdr955 oh wow, I was trained in the air force and think of this as rather basic info. I did simplify my explanation a bit but the basic premises are solid… In my view this is fundamental aerodynamics and applies to all sizes.