Was really looking forward to seeing this flying - it’s a beautiful build and a work of art. Really sad for you for it to end like that - whatever happens with the R3 I’m sure we will see something else amazing from your workshop. Commiserations and best wishes from the UK.
Beautifully constructed with near perfectly matching flight characteristics of the real airplane. Namely a widow maker. Looked to be a scale stall spin.
The Granville Brothers designs had a checkered history with numerous lives lost. With the long months you put into this beauty, that doesn't make it any easier but believe me when I say thank you for sharing. Jim
Rüya gibi bir inşaa süreciydi inanılmaz yetenekli ve donanımlı bir adamsın.Süreci adım adım izlemek büyük bir keyifti.Güzel başladı ama kötü bitti çok üzgünüm😢Bu yakışıklı makinanın tekrar uçtuğunu görmek için sabırsızlanıyorum kolay gelsin😃
Merhaba Uzun süre endişelenmenize gerek yok, uçak zaten onarıldı, değişiklikler uygulandı ve yakında yeni uçuşunu bekliyor. O halde bizi izlemeye devam edin :)
Sorry bud, I feel your pain. That was an awesome build and it looks like it can be repaired. Good luck getting it back together, would love to it fly again!
Couple thoughts: First rebuild the plane with 2 changes, taller vertical stabilizer and 2 to 3 degrees of right thrust in the engine. Second, always keep in mind that with the Gee Bee R3 that wing design is very prone to stalls at low speeds so you have to keep the speed at no less than 1/3rd throttle at all times especially on approach for landing. Hope this helps.
@@rehepeks well you have to keep one thing in mind the full scale Gee Brrhad large fairings and I’m having flown a couple RC Gee Bees myself I can tell you that the fairings actually added to the stability believe it or not. Especially in knife edge.
Right thrust would cure most of the issue like the last poster said. I also think some wing dihedral would be benificial. Beautiful plane! I watched the whole build series.
So sorry to see the crash. Beatiful build! On the bright side, I think you gained lots of subscribes today and support. Love all your videos and can't wait to see your next project or fix 🤗 I just wonder, out of all the other gee bee r3's flying out there is that adverse yaw with thrust common? I know by design this plane is a handful no matter what. Looked like a stall for sure. Again, sorry to hear, was great to see her fly 👍
I had an EPO version of this plane, and I remember the yaw axis being marginally stable at slow speeds. It got a little better at higher speeds, but that tail wagging and tendency to drop the tail in turns was still there. Pitch was a little bit touchy too, but totally manageable. I'd imagine that those characteristics would likely be magnified in a larger scale balsa model. Loved flying it though, and just like yours, she looked great in the air!
Wow. Sorry for your loss. This is why I’ve never flown my R3. It’s too beautiful to crash. Red and white. Bought a ARF kit at an auction for $75. It hangs from the rafters at the warehouse.
Just can't beleive ! Everything was perfect ! And bam ! I d'ont think it's the plane ! Look like the electronic problem ! Signal or receiver ! Hope you will find out ! You put so much work and times on every planes you make ! I feel so bad for you ! 💙✈️
Hey Marko. So sad to see this beauty crash. Flying planes with tricky behavior fast, always helps. Even on my RC SCRAPPY, it feels best at half throttle or higher. Would be great to see your GeeBee R3 fly again.
en regardant la vidéo avec une vitesse de 0.25 le GBee déclenche juste après que le drone passe devant lui plus sur la gauche de l'avion il est possible que le déclenché soit crée par effet de sillage le flux des 4 moteurs du drone est peut-être à l'origine du problème ?
It needs a thrust angle which is why the yaw is controlled so much by the motor cause of p factor… and I’ve been watching you build this thing so sad to see it go in on the maiden but I’ve had it happen with many a plane including balsas
First turn we can see it does not want to turn, maybe add angle to the engine, differential to the ailerons. Maybe it spin at the end because it need negative twist at the tip of wings?
Sad to see. If its any consolation, as history would have it, it was practically as successful as any of the original Granville Brothers racers. Only, yours did not kill its pilot, and will probably fly again. Thanks for sharing.
I know it has been said before but since I noticed it in the video before reading the comments there are three things. The plane looked tail heavy, if you look in the turns the tail is flying way below the nose. Yaw instability at different throttle settings is typically an issue of incorrect thrust angle. This plane does not like to fly slowly, particularly the elliptical wing and the short vertical stabilizer. I don't know if you were flying with flight stabilization or not but I would consider it for this kind of plane, it won't save you from a slow speed stall but it will help smooth things out in general flight (make up for some of the difficulties of this type of airplane). Still, beautiful build and it seems to have survived remarkably well, hope to see it flying again.
Beautiful airplane! As it is specific design, used for speed racing, it needs to be piloted cautiously. I am not as good pilot to give advices to somebody else, but I would recommend you to use expos especially on elevator and maybe ailerons, too. I have much smaller Spitfire (similar conception, eliptical wing, rudder not so big and prone to stalling), and have some experience (crashes :)) with it. I would say, during flight maintain speed, at least half throttle, use more rudder and less ailerons in turns (the last turn was at 90° bank angle and without speed, if I can assess from the view taken by the drone, also moving). You could also lift both ailerons up, 2-3 mm, simulating twisting of the tips, or ad turbulators on the outer parts of the wing. I wish You good luck and many flights with the beauty in the future!
That's a solid plane. From the crash video I thought it was a total loss. But after disassembling it, it looks like repairable damage after all. Keep on pushing. Next time it will be better. 👍
So sorry man, it suks to put all ur time an heart into sumthin an it doesnt work out. Ur one of the best builders ive ever seen, im sure ull come bak with sumthin even better!!!
Hey Marko, i am sorry for the temporary loss of the GeeBee. That hurts but is still a part of our hobby. I am sure you can rebuilt the plane, it was more or less in one piece after the crash. GeeBee's are real aviation diva's...they don't want to do what the pilot want most of the time 😅 Good luck for the remaiden! 😉👋❤
I am very sorry for you about the crash! You say - the more gas, the more instability. Like some previous comments suggest - I think the side pull should be strongly to the right. 3 degrees. Perhaps you could test the side pull again with a shock flyer with the same ratios. Best regards from Leipzig :) PS: Feel encouraged to rebuild the machine!
If the engine/prop was creating turbulance over the vertical stab, then it stands to reason that u didnt have any or enough offset in ur engine alignment. We have ALWAYS built in a certain degree of left or right and some down angular offset depending on which direction the engine rotates as it creates propwash and directional propwash votex over the aircraft putting forces on the vertical and horizontal stabs. Some are not noticable while others with a high torque engine or large prop, can create substantial amounts.
Hello Marko, first of all compliments for the very nice build. The plane can and MUST be rebuilt, it's too nice to be forgotten. I have read several comments blaming the designer Mirco Pecorari because he's not an aeronautical engineer. Honestly I don't think that has anything to do with the issues your plane has. I don't think the rudder size is an issue, there are other Gee-Bee R3 flying with no issue at all, so the problems must be somewhere else. In my opinion there are three problems, two are easy(er) to solve then the other: - First issue is the engine alignment, the engine must be tilted right and down about 2 or 3 degrees right and 2 or 3 degrees down. Honestly I don't recall from your videos if you already did this or not. If you already mounted the engine with a tilt you should increase it. The higher the engine power compared to the plane size, the more angle you have to tilt the engine. This is done also on real airplanes, very easy to notice on the Bearcat, when the plane is sitting on the ground the propeller is almost perpendicular to the ground, but the nose is pointing the sky. This will take the spinner/propeller out of the center of the nose cowling so you have to move the engine mount attaching points to the firewall from the center of the plane in order for the spinner to be centred; - Second issue is the CG, it definitely was tail heavy, move the CG forward about 7-8 mm or 1/4 of an inch and you'll be fine. This will improve also the stall and spin characteristics; - Third way to improve stall and spin characteristics would be to build a washout on the wings ( en.wikipedia.org/wiki/Washout_(aeronautics) ), but you would need to rebuild the wings. Something you can do is to lift both ailerons 1 or 2 mm in order to decrees the average incidence of the wing tips. Hope this will help, keep up the awesome job you've done and keep on inspiring us. Blue skies.
Sorry for your crash.. what a nice plane it is, and seems plenty fixable. You can get some cues from your maiden flight landing. The plane seems a bit tail heavy and prone to tip stall instead of droping the nose forward. The usual fixes are less elevator authority, some washout on the wings and some extra nose weight. Also consider that this plane is not the easiest to fly and control at low speeds. Cheers!
Tip stall at 6:40 and 6:46. Some airplanes will not fly slow at all and there was a bit of a tip stall during the 1st landing just before touchdown. The solution is to be aggressive and fly it like the racer it is at all times. Once it started stalling and spinning there is almost no solution unless there is a lot of altitude for a gradual full power pull out.
Sorry to see that Marco. It’s definitely impressive to see you design and build such beautiful aircraft. Unfortunately sometimes it is be painful to learn the design needs some improvement. I hope you make some adjustments to create a more stable version. Good luck. 👍🏻
Sorry on such a beutiful build. There is a reason that conceptual art aircraft dont fly well (the R3 is originally from a graphical designer and not an engineer). The R3 just dont have enough vertical tail size. Looks cool, but directional stability is poor, as evident from the video. Look at the massive nose area and the the landing gear fairings acting as destabilizing surfaces in front of the cg. Then look at the tail and its aerodynamically inefficient planform. Scale up the vertical tail and she will fly again! And give that bush a hug for catching the aircraft softly. Best of luck!
Several R3 models are great flyers like the one from airworld. I had a wooden 3m R3, and that thing flew like a trainer, even in a dead stick landing. You can find that video on my YT channel BTW.. for the rest.. sad to see such a beautiful build heavily damaged. I think a bit tail heavy, side thrust of the engine. Also the way it cornered.. no coordinated turns with the rudder? I hope he rebuilds it.
That's what you noticed?? The thing is definitely not running right from the very start, it most certainly needed to be tuned before it flew. As an automotive mechanic, and a model airplane hobbyist, that thing sounds absolutely terrible. After watching the whole video despite the poor running quality, he definitely stalled trying to bank and yank, and was trying to pull out the whole time when you need let it dive when stalling to get airspeed.
Lots of side area on those undercarriage fairings in front of centre of gravity. Once the plane starts to yaw due to an upset from something like turbulence, the small area of vertical stabiliser can’t overcome the effect. Like trying to throw a dart backwards. Didn’t look right how it was flying sort of straight while banking with adverse yaw. Like a slight knife edge attempt.
Nice maiden fly even if sadly end. This plane is not a cool choise with short fuselage lenght, small vertical tail, big motor, enormous wheels, Reynolds-wing profile : real nightmare for good aerodynamic mix . After so much work, I understand it could be difficult to proceed in experimental way. Thanks for your work Maestro
You are such a great builder. Sorry to see the crash. I don't think I've seen one of these R3's fly well. They lack directional stability just like my giant scale Kelly F1D. I don't fly that often because it's just not much fun. I sure hope your engine is ok.
never forget that Geebees are speed planes!! Geebees are planes known to be sensitive and unforgiving. Trying to make a committed turn without speed or a propeller blowing the wings is the best way to send it to the ground :( once the stall is engaged you pull on the elevator which has the effect of engaging it to the right which does not help anything. You have just paid dearly for a basic piloting error :( I hope you reassemble this plane as quickly as possible and enjoy it fully.
That is so well observed. Beeing slow and turning with this airframe will for sure produce exactly that. I wonder, was there a way to recover you think? Still had some decent altitude and I would do the same with the elevator in end up in that spiral too.
@@ConservativeUSA67 in the video it is difficult to judge the altitude but yes it is possible to prepare a stall (it is a known figure in aerobatics (flat spin)) 1: in order for the wings to be supported again, the aircraft must be allowed to regain speed with the control surfaces to neutral and engine to slow down the aircraft will naturally stop its spin and we will be able to pull gently on the stick and put gas gently also . 2: note that the aerodynic of a wing is a very complicated science , so the wings in eliptic shape have shown very quickly that they are vicious in flights especially at low speed , so yes it is very pretty on a mustang but that’s all:) today no plane has eliptic wings. 3: according to me and what I apply on my planes, during the maiden flight I need to be alone in flight and out of the question that a drone comes to make videos around me . the concentration must be at max with nothing that must pollute it . 4: I do not know the level of the pilot and far from me the idea of judging him , however some planes require a time of learning .. sorry for my bad english :)
My condolences. months of design and build and I know how you feel. What type of receiver and protocol your RC was on? I lost my Aeromaster due to ignition module interference causing RC brownout. Next time I am placing my ignition module in a Faraday cage.
So sorry!! Gorgeous plane. That engine sound is fantastic. But it was almost knife flying all the time. A bit of rudder would ease the turns.... Maybe a mix will help next time.
Sad to see it go down. As you already said in your video: very likely a stall and subsequent vrille. Knee jerk reaction is always to put in up elevator, where in order to get out of it you need down elevator and counter rudder. If you didn't put in any side thrust on the motor it definitely seems to need it. Unfortunately this kind of shit happens in our hobby, especially with scratch builds. I'll be looking forward to what you do next.
I agree. It looks like it stalled. Been there a few times. Hate to say it but crashing is apart of the hobby. But there is always another one to build!
CG or engine thrust line change may have helped, or a lighter wing loading. IMO the main issue is the design though. Gee Bees are designed to be racers…short coupled with lots of power and minimal flight controls/stabilizers for less drag. They are a handful and challenging to fly. Deviating from scale and enlarging the tail is hard to do on the Gee Bees without it looking wrong, but is almost required.
Difficult to diagnose that one. A possible clue may lie with the fin /rudder instability varying with engine revs. Sympathetic resonance perhaps or,, possibly, 'flutter' even. It may be possible to reproduce this on the bench. Sometimes, changing the Mass of a component can do the trick,,,,,,good hunting !
Una lastima hermoso abion y como sonaba e motor igual bastante bien se lo banco al golpe parese como que esta mal el centro de gabedad o mucho mando o pesado el modelo son los sintomas de la pedida o por baja velosidad n se la banca el modelo dado que son abines de velocidad pensado para carreras igual al repararlo y probaro de buelta agarrarle la mano a la perdida o ponerleun oquito de peso en la trompa saludos Roolaid !!!!
Too tail heavy for an elliptical wing, needs more dihedral as well, at-least so the top surface of the wings are level, needs right thrust on the engine mount with counter clockwise prop and, most importantly, lose the wheel pants. They are causing lift when banked which lifts the nose up/tail down as they are in-front of the CG. Vert stab is about the right size if you lose the pants. But a fantastic build, and I cant believe the prop survived a vertical crash!
I thorougly enjoy all your videos, mainly the construction techniques. Sorry about your maiden, crashes are near inevitable in RC, and we can only hope for more time before our models leave us! damage looks limited though so I'll bet you'll get it fixed soon. you definately had it in a spin and some planes are non recoverable. a forward CG is generally helpful but your wing might just always be prone. best of luck with the rebuild and refly.
My first thought was stall, as well. With the bank angels necessary to make turns it could be easy to sneak up on it when the nose comes up. I do know they drop like a set set of car keys when you do stall, but can’t be certain that was what happened here. Also could be the tail stalling as well. Even though it appeared to have enough forward speed it is deceptive to know when the wing is flying again. The Ryan STA has similar flight characteristics but not nearly as amplified as this design. It would be considered a challenge to set one of these up to neutralize all or some of the inherent power and aerodynamics instability, as the idea was all about speed. It looked like something I would try and salvage, but hate those things when they misbehaved.
A very unfortunate episode, it's an interesting looking AC. It looks like a standard GB from the past with a stretched fuselage and Spitfire wings. Hopefully you'll bring it back to life.
I’m surprised by how well it could stay together in such a brutal crash, I loved the sound of it
Thanks to the bush it fell in I guess
Thanks
Thank you, it's a small amount for you but a big amount for the future universe
Was really looking forward to seeing this flying - it’s a beautiful build and a work of art. Really sad for you for it to end like that - whatever happens with the R3 I’m sure we will see something else amazing from your workshop. Commiserations and best wishes from the UK.
Beautiful plane. Sorry to see the crash.
Beautifully constructed with near perfectly matching flight characteristics of the real airplane. Namely a widow maker. Looked to be a scale stall spin.
There was never a full size aircraft…..it was just a design concept.
As the old saying goes, any landing you can walk away from is a good one! 😊
pretty sure that's a saying for real aircraft
An absolute work of art!
so sorry about your plane. fortunately you are the builder you can build as many as you want. tks fir sharing!!
What a beauty! Awesome! 2 thumbs up!! Then it went down, and I cried.
The Granville Brothers designs had a checkered history with numerous lives lost. With the long months you put into this beauty, that doesn't make it any easier but believe me when I say thank you for sharing. Jim
Just keep on with the great work good luck Peter
Rüya gibi bir inşaa süreciydi inanılmaz yetenekli ve donanımlı bir adamsın.Süreci adım adım izlemek büyük bir keyifti.Güzel başladı ama kötü bitti çok üzgünüm😢Bu yakışıklı makinanın tekrar uçtuğunu görmek için sabırsızlanıyorum kolay gelsin😃
Merhaba
Uzun süre endişelenmenize gerek yok, uçak zaten onarıldı, değişiklikler uygulandı ve yakında yeni uçuşunu bekliyor. O halde bizi izlemeye devam edin :)
@@MarkoRoolaidпросто ты мастер делать модели а не пилот.
Будешь всегда падать при простых ошибках.
@@MarkoRoolaidэлероны вывалились
Не умеешь ты делать их.
not the end of the world! i think you must keep up with the good work of yours
Such a nice plane, I hope you will get it up in the air again! 😀
Good job….. keep going
Sorry bud, I feel your pain. That was an awesome build and it looks like it can be repaired. Good luck getting it back together, would love to it fly again!
Very strong airframe. Faired well considering the crash. Looks very repairable.
Couple thoughts: First rebuild the plane with 2 changes, taller vertical stabilizer and 2 to 3 degrees of right thrust in the engine. Second, always keep in mind that with the Gee Bee R3 that wing design is very prone to stalls at low speeds so you have to keep the speed at no less than 1/3rd throttle at all times especially on approach for landing. Hope this helps.
Good advice,
Is it wrong to use rule of thumb of vertical stabilizer/tail being 10% taller than prop ?
And possibly a few degrees of wash out on the wing tips.
I would not be surprised if these massive main gear fairings forward of CG add to the instability.
@@rehepeks well you have to keep one thing in mind the full scale Gee Brrhad large fairings and I’m having flown a couple RC Gee Bees myself I can tell you that the fairings actually added to the stability believe it or not. Especially in knife edge.
Hope that beautiful engine will be OK to live next plane, sound is impressive. Your planes look like art.
Right thrust would cure most of the issue like the last poster said. I also think some wing dihedral would be benificial. Beautiful plane! I watched the whole build series.
So sorry to see the crash. Beatiful build! On the bright side, I think you gained lots of subscribes today and support. Love all your videos and can't wait to see your next project or fix 🤗 I just wonder, out of all the other gee bee r3's flying out there is that adverse yaw with thrust common? I know by design this plane is a handful no matter what. Looked like a stall for sure. Again, sorry to hear, was great to see her fly 👍
I had an EPO version of this plane, and I remember the yaw axis being marginally stable at slow speeds. It got a little better at higher speeds, but that tail wagging and tendency to drop the tail in turns was still there. Pitch was a little bit touchy too, but totally manageable. I'd imagine that those characteristics would likely be magnified in a larger scale balsa model. Loved flying it though, and just like yours, she looked great in the air!
CAIR FAZ PARTE do HOBIE ! TODOS NÓS JA CAIMOS VIDA QUE SEGUE 👍👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻 🇧🇷
Outro teste em breve, o avião está saudável novamente e esperando para voar
Wow. Sorry for your loss. This is why I’ve never flown my R3. It’s too beautiful to crash. Red and white. Bought a ARF kit at an auction for $75. It hangs from the rafters at the warehouse.
Beautiful plane, sorry for your loss
Very sad - such a wonderful build! Hope you can rebuild her with improvements and fly again 👏
Just can't beleive ! Everything was perfect ! And bam ! I d'ont think it's the plane ! Look like the electronic problem ! Signal or receiver ! Hope you will find out ! You put so much work and times on every planes you make ! I feel so bad for you ! 💙✈️
You are a strong man Sr. YOU COULD CREATE THIS PEASE OF ART SO YOU ARE UNSTOPABLE!!! drink a beer and do it again ...go for it...
Hey Marko. So sad to see this beauty crash. Flying planes with tricky behavior fast, always helps. Even on my RC SCRAPPY, it feels best at half throttle or higher. Would be great to see your GeeBee R3 fly again.
Watched this build from start to finish
Beautiful maiden flight
Hope that drone didn’t interfere with signal
I was thinking the same thing drone interface???? Possibility
Very nice model ! Tho. Hope to see it or another one flying soon !
Awww damn bro, gorgeous plane! Sorry to see her go down. Tip stalls are a b****! Hope you can get her back in the air again soon brother!
en regardant la vidéo avec une vitesse de 0.25 le GBee déclenche juste après que le drone passe devant lui plus sur la gauche de l'avion il est possible que le déclenché soit crée par effet de sillage le flux des 4 moteurs du drone est peut-être à l'origine du problème ?
It needs a thrust angle which is why the yaw is controlled so much by the motor cause of p factor… and I’ve been watching you build this thing so sad to see it go in on the maiden but I’ve had it happen with many a plane including balsas
First turn we can see it does not want to turn, maybe add angle to the engine, differential to the ailerons. Maybe it spin at the end because it need negative twist at the tip of wings?
shame... Its a beautiful plane!! One of the prettiest I have seen
Sad to see. If its any consolation, as history would have it, it was practically as successful as any of the original Granville Brothers racers. Only, yours did not kill its pilot, and will probably fly again.
Thanks for sharing.
Deliberately done
no
Well, this was one of my favorite projects throughout the winter season... So sorry to see such an unfortunate crash 😢
I know it has been said before but since I noticed it in the video before reading the comments there are three things. The plane looked tail heavy, if you look in the turns the tail is flying way below the nose. Yaw instability at different throttle settings is typically an issue of incorrect thrust angle. This plane does not like to fly slowly, particularly the elliptical wing and the short vertical stabilizer. I don't know if you were flying with flight stabilization or not but I would consider it for this kind of plane, it won't save you from a slow speed stall but it will help smooth things out in general flight (make up for some of the difficulties of this type of airplane). Still, beautiful build and it seems to have survived remarkably well, hope to see it flying again.
Bummer mate. Was all good right up until the stall that it wouldn't recover from. Perfect example of an accelerated stall spin.
Lo siento mucho. Ánimo y seguro que nos asombrarás con futuros proyectos
Beautiful airplane! As it is specific design, used for speed racing, it needs to be piloted cautiously.
I am not as good pilot to give advices to somebody else, but I would recommend you to use expos especially on elevator and maybe ailerons, too. I have much smaller Spitfire (similar conception, eliptical wing, rudder not so big and prone to stalling), and have some experience (crashes :)) with it.
I would say, during flight maintain speed, at least half throttle, use more rudder and less ailerons in turns (the last turn was at 90° bank angle and without speed, if I can assess from the view taken by the drone, also moving). You could also lift both ailerons up, 2-3 mm, simulating twisting of the tips, or ad turbulators on the outer parts of the wing. I wish You good luck and many flights with the beauty in the future!
That's a solid plane. From the crash video I thought it was a total loss. But after disassembling it, it looks like repairable damage after all. Keep on pushing. Next time it will be better. 👍
So sorry man, it suks to put all ur time an heart into sumthin an it doesnt work out. Ur one of the best builders ive ever seen, im sure ull come bak with sumthin even better!!!
So sorry for you Marko such a beautiful plane. Looks like it will repair OK
both ailerons come off after crashing were they attached properlly?
Hey Marko, i am sorry for the temporary loss of the GeeBee. That hurts but is still a part of our hobby. I am sure you can rebuilt the plane, it was more or less in one piece after the crash. GeeBee's are real aviation diva's...they don't want to do what the pilot want most of the time 😅 Good luck for the remaiden! 😉👋❤
honestly i thought there would have been more damage. Looks like you built it like a tank. Hope you can get it back in the air.
I saw your car license plate, you are from Estonia :) Greetings from Lithuania :)
I am very sorry for you about the crash!
You say - the more gas, the more instability. Like some previous comments suggest - I think the side pull should be strongly to the right. 3 degrees.
Perhaps you could test the side pull again with a shock flyer with the same ratios.
Best regards from Leipzig :)
PS: Feel encouraged to rebuild the machine!
ok, thank you
If the engine/prop was creating turbulance over the vertical stab, then it stands to reason that u didnt have any or enough offset in ur engine alignment. We have ALWAYS built in a certain degree of left or right and some down angular offset depending on which direction the engine rotates as it creates propwash and directional propwash votex over the aircraft putting forces on the vertical and horizontal stabs. Some are not noticable while others with a high torque engine or large prop, can create substantial amounts.
Hi, thank you
So sorry mate its heart breaking when it happens, i hope you can repair her bro ,all the best 🤙🤙🤙
Hello Marko, first of all compliments for the very nice build. The plane can and MUST be rebuilt, it's too nice to be forgotten. I have read several comments blaming the designer Mirco Pecorari because he's not an aeronautical engineer. Honestly I don't think that has anything to do with the issues your plane has. I don't think the rudder size is an issue, there are other Gee-Bee R3 flying with no issue at all, so the problems must be somewhere else.
In my opinion there are three problems, two are easy(er) to solve then the other:
- First issue is the engine alignment, the engine must be tilted right and down about 2 or 3 degrees right and 2 or 3 degrees down. Honestly I don't recall from your videos if you already did this or not. If you already mounted the engine with a tilt you should increase it. The higher the engine power compared to the plane size, the more angle you have to tilt the engine. This is done also on real airplanes, very easy to notice on the Bearcat, when the plane is sitting on the ground the propeller is almost perpendicular to the ground, but the nose is pointing the sky. This will take the spinner/propeller out of the center of the nose cowling so you have to move the engine mount attaching points to the firewall from the center of the plane in order for the spinner to be centred;
- Second issue is the CG, it definitely was tail heavy, move the CG forward about 7-8 mm or 1/4 of an inch and you'll be fine. This will improve also the stall and spin characteristics;
- Third way to improve stall and spin characteristics would be to build a washout on the wings ( en.wikipedia.org/wiki/Washout_(aeronautics) ), but you would need to rebuild the wings. Something you can do is to lift both ailerons 1 or 2 mm in order to decrees the average incidence of the wing tips.
Hope this will help, keep up the awesome job you've done and keep on inspiring us.
Blue skies.
bad luck , feel your pain ,you told it like a man well done .
Sorry for your crash.. what a nice plane it is, and seems plenty fixable. You can get some cues from your maiden flight landing. The plane seems a bit tail heavy and prone to tip stall instead of droping the nose forward. The usual fixes are less elevator authority, some washout on the wings and some extra nose weight. Also consider that this plane is not the easiest to fly and control at low speeds. Cheers!
Tip stall at 6:40 and 6:46. Some airplanes will not fly slow at all and there was a bit of a tip stall during the 1st landing just before touchdown.
The solution is to be aggressive and fly it like the racer it is at all times. Once it started stalling and spinning there is almost no solution unless there is a lot of altitude for a gradual full power pull out.
I think you need a yaw dumper(whatever that is)
Sorry to see that Marco. It’s definitely impressive to see you design and build such beautiful aircraft. Unfortunately sometimes it is be painful to learn the design needs some improvement. I hope you make some adjustments to create a more stable version. Good luck. 👍🏻
Sorry on such a beutiful build. There is a reason that conceptual art aircraft dont fly well (the R3 is originally from a graphical designer and not an engineer). The R3 just dont have enough vertical tail size. Looks cool, but directional stability is poor, as evident from the video. Look at the massive nose area and the the landing gear fairings acting as destabilizing surfaces in front of the cg. Then look at the tail and its aerodynamically inefficient planform. Scale up the vertical tail and she will fly again! And give that bush a hug for catching the aircraft softly. Best of luck!
Several R3 models are great flyers like the one from airworld. I had a wooden 3m R3, and that thing flew like a trainer, even in a dead stick landing. You can find that video on my YT channel BTW.. for the rest.. sad to see such a beautiful build heavily damaged. I think a bit tail heavy, side thrust of the engine. Also the way it cornered.. no coordinated turns with the rudder? I hope he rebuilds it.
Looked to be flying just fine… he caused an aggravated stall
That's what you noticed?? The thing is definitely not running right from the very start, it most certainly needed to be tuned before it flew. As an automotive mechanic, and a model airplane hobbyist, that thing sounds absolutely terrible.
After watching the whole video despite the poor running quality, he definitely stalled trying to bank and yank, and was trying to pull out the whole time when you need let it dive when stalling to get airspeed.
Que de bêtises .... Mais vous savez pourquoi un avion vole....?? Apparemment....non
Allez apprendre
@@sharp68chevyguy french....!
Lots of side area on those undercarriage fairings in front of centre of gravity. Once the plane starts to yaw due to an upset from something like turbulence, the small area of vertical stabiliser can’t overcome the effect. Like trying to throw a dart backwards. Didn’t look right how it was flying sort of straight while banking with adverse yaw. Like a slight knife edge attempt.
thank you very much
Sorry to hear. Hopefully it’s repaired able. Keep us posted on what possibly happened that you lost control.
Tell ya what, that could have been 100% worse!
That’s not that bad.
It's a shame it was a very nice looking airplane,very nice build,I'm not a flyer so cannot say anything else,just good luck in the future.
Nice maiden fly even if sadly end.
This plane is not a cool choise with short fuselage lenght, small vertical tail, big motor, enormous wheels, Reynolds-wing profile : real nightmare for good aerodynamic mix .
After so much work, I understand it could be difficult to proceed in experimental way.
Thanks for your work Maestro
You are such a great builder. Sorry to see the crash. I don't think I've seen one of these R3's fly well. They lack directional stability just like my giant scale Kelly F1D. I don't fly that often because it's just not much fun. I sure hope your engine is ok.
never forget that Geebees are speed planes!!
Geebees are planes known to be sensitive and unforgiving.
Trying to make a committed turn without speed or a propeller blowing the wings is the best way to send it to the ground :(
once the stall is engaged you pull on the elevator which has the effect of engaging it to the right which does not help anything.
You have just paid dearly for a basic piloting error :(
I hope you reassemble this plane as quickly as possible and enjoy it fully.
That is so well observed. Beeing slow and turning with this airframe will for sure produce exactly that. I wonder, was there a way to recover you think? Still had some decent altitude and I would do the same with the elevator in end up in that spiral too.
@@ConservativeUSA67
in the video it is difficult to judge the altitude but yes it is possible to prepare a stall (it is a known figure in aerobatics (flat spin))
1:
in order for the wings to be supported again, the aircraft must be allowed to regain speed with the control surfaces to neutral and engine to slow down the aircraft will naturally stop its spin and we will be able to pull gently on the stick and put gas gently also .
2: note that the aerodynic of a wing is a very complicated science , so the wings in eliptic shape have shown very quickly that they are vicious in flights especially at low speed , so yes it is very pretty on a mustang but that’s all:)
today no plane has eliptic wings.
3:
according to me and what I apply on my planes, during the maiden flight I need to be alone in flight and out of the question that a drone comes to make videos around me .
the concentration must be at max with nothing that must pollute it .
4: I do not know the level of the pilot and far from me the idea of judging him , however some planes require a time of learning ..
sorry for my bad english :)
So sorry for you 😢
this plane is superb and it deserves a second chance even if it's mentally tough.
Regards
Im sorrg that happened did your engine and prop have 3 to 4 degrees if left angle??? If not that will cause it to yaw when you hit the throttle
Oh, man! I feel your pain! After 1 year build I had same crash happent with same plane!
Hello
Then I'm not the only one :):)
My condolences. months of design and build and I know how you feel.
What type of receiver and protocol your RC was on?
I lost my Aeromaster due to ignition module interference causing RC brownout.
Next time I am placing my ignition module in a Faraday cage.
Really sad because it was such a beautiful plane!
So sorry!! Gorgeous plane. That engine sound is fantastic.
But it was almost knife flying all the time. A bit of rudder would ease the turns.... Maybe a mix will help next time.
What a beautiful plane, what a pity!
Did you consider that the signal controlling the drone may have interfered with your aircraft's control signal?
Sad to see it go down. As you already said in your video: very likely a stall and subsequent vrille. Knee jerk reaction is always to put in up elevator, where in order to get out of it you need down elevator and counter rudder. If you didn't put in any side thrust on the motor it definitely seems to need it. Unfortunately this kind of shit happens in our hobby, especially with scratch builds. I'll be looking forward to what you do next.
Experts !
Need more right thrust for P factor. And more rpm
que ganas de estresarse con ese modelo, es lindo , pero vuela como un ladrillo
I agree. It looks like it stalled. Been there a few times. Hate to say it but crashing is apart of the hobby. But there is always another one to build!
@@jdsstegman 🙂🙂🙂 Thank you
I had a P51 snap roll on me becuase of the small rudder. I repaired it and increased the area by 20%. Much better now.
CG or engine thrust line change may have helped, or a lighter wing loading. IMO the main issue is the design though. Gee Bees are designed to be racers…short coupled with lots of power and minimal flight controls/stabilizers for less drag. They are a handful and challenging to fly. Deviating from scale and enlarging the tail is hard to do on the Gee Bees without it looking wrong, but is almost required.
Difficult to diagnose that one. A possible clue may lie with the fin /rudder instability varying with engine revs. Sympathetic resonance perhaps or,, possibly, 'flutter' even. It may be possible to reproduce this on the bench. Sometimes, changing the Mass of a component can do the trick,,,,,,good hunting !
Una lastima hermoso abion y como sonaba e motor igual bastante bien se lo banco al golpe parese como que esta mal el centro de gabedad o mucho mando o pesado el modelo son los sintomas de la pedida o por baja velosidad n se la banca el modelo dado que son abines de velocidad pensado para carreras igual al repararlo y probaro de buelta agarrarle la mano a la perdida o ponerleun oquito de peso en la trompa saludos Roolaid !!!!
So sorry for that😢. I hope you can rebuild it 👍
It's really beautyfull work. il like to see your working vidéo.
Sorry for this crash. do you know what's happened ?
SEI BRAVO...BEL VOLO. PECCATO
it was probably wind shear from the drone that was filming it
enlarge rudder height. The fixed part. It solve your almost of this inestability
Too tail heavy for an elliptical wing, needs more dihedral as well, at-least so the top surface of the wings are level, needs right thrust on the engine mount with counter clockwise prop and, most importantly, lose the wheel pants. They are causing lift when banked which lifts the nose up/tail down as they are in-front of the CG. Vert stab is about the right size if you lose the pants. But a fantastic build, and I cant believe the prop survived a vertical crash!
Lots of comments on how to fly and why it happened but I wonder if turbulence from the drone was the issue.
I thorougly enjoy all your videos, mainly the construction techniques. Sorry about your maiden, crashes are near inevitable in RC, and we can only hope for more time before our models leave us! damage looks limited though so I'll bet you'll get it fixed soon. you definately had it in a spin and some planes are non recoverable. a forward CG is generally helpful but your wing might just always be prone. best of luck with the rebuild and refly.
My first thought was stall, as well. With the bank angels necessary to make turns it could be easy to sneak up on it when the nose comes up. I do know they drop like a set set of car keys when you do stall, but can’t be certain that was what happened here. Also could be the tail stalling as well. Even though it appeared to have enough forward speed it is deceptive to know when the wing is flying again. The Ryan STA has similar flight characteristics but not nearly as amplified as this design. It would be considered a challenge to set one of these up to neutralize all or some of the inherent power and aerodynamics instability, as the idea was all about speed. It looked like something I would try and salvage, but hate those things when they misbehaved.
Noooooooooooo 😱😱😱😱🤯🤯😭😭😭 Shit happens ! But you are a great modeller, i think she fly's in two weeks. 👍
Wow! you are very optimistic two weeks!
A very unfortunate episode, it's an interesting looking AC. It looks like a standard GB from the past with a stretched fuselage and Spitfire wings. Hopefully you'll bring it back to life.
I have a twin that is doing the same thing, I think the elevator is slightly out of line or tail heavy, not sure.
Where is this field located if I may ask?
Nice model, unfortunately the full size also had directional control problems as well, maybe replicated on the model?
Sad to see it go down like that. That was a stall, and then stall spin. Been there done that myself.
thank you
Interesting that it appeared to depart controlled flight immediately after possibly flying through the drone's prop-wash about 06:39
did the drone interfere with the radio signal?????????????????