$20,000.00 BVM F-18 Twin Turbine Mid Air Crash / Break Up Due to Servo arm Spline (nylon failure)
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- Опубліковано 4 лют 2025
- PLAYBACK at .25 SPEED, looks to be the left aileron started fluttering and then this spread to the right wing which then caused both wings to fail and the elevators then sheared off along with the rudder.
Reason for failure was because the servo was using a nylon (dubro) style servo arm spline; this was because the servo was upgraded from the stock spark servos. The stock arm is metal.
Metal servo arms are important for large models.
Video of this plane during 2019 rally: • Blue Angels F-18 Large...
I am the owner and pilot of this Jet. Let me make things clear that it was NOT a manufacturing defect from BVM. And, flying without missile rails is fine. The crash happened due to a Dubro Heavy Duty control horn spline failure. A few years back, I replaced the servos that came with the jet in the ailerons from the Spark servos with some high end JR servos that I had on hand. Since I fly mainly Spectrum, I didn't have any metal control arms on hand, so I grabbed a few heavy duty plastic ones to use that fit the JR spline.. This jet had over 100 flights on it before having this crash. The left wing aileron servo stripped the spline on the plastic control horn causing catastrophic failure that disintegrated the wing which then caused the whole fuselage to crack in half during the flight which was probably around 140 mph. If I would have used the suggested and proper metal control horn this crash would not have happened. Lessons learned.
To the commentor below, These jets can and do fly without gyro, and they are made well. If anyone would like to contact me personally to discuss, I am more than happy to share my experiences with this jet. I also own and fly the following BVM Jets:
1/5 F16
F100
F1 Mirage
Ultra Bandit
Rafale
F86 Sabre
Sorry about that Andy. Marty
Sorry for the loss. I am glad you got a bunch of flights on your #5 BA. I'm on my 3rd 1/5 F18 BA #5 - love the scheme!
@@spyda2002 interestingly they all three fly very similar. The F16 is much more nimble, the F18 fly's a bit heavier on the stick but more "on the rails" straight and level. The F1 is kind of in between. All three land very well with controlled decent (throttle management/high alpha).
Ease of landing, once the runway is made, goes to the F1, then the F16 and F18. I rate it this way only because the F1 has the most stable rollout of all three. It seems to handle better in crosswinds. The F16 is hardest to handle on the ground in crosswinds due to the enormous vertical fin. Also, the F16 landing gear is closer together than the F18 and the F1, making it want to wing tip in crosswinds a bit.
Hope this helps :)
Thanks for your comment. I fly giant scale 3D and I use metal gear servos and metal control arms exclusively. The control surface stresses are immense especially at the speeds you fly. I hope some day in the not to distant future to get a BVM F-18, beautiful plane. Curious, was it a total loss ? Turbines smoked or salvageable ?
@@JDM_MSKLikewise, I'm actually curious about how much is salvageable from this crash and just crashes in general with turbine planes/jets.
Oh, no, Holly cow! Awesome model!
So I own one of these jets and love it. I wonder if the removal of the wing tip rails could have had something to do with it, since the aileron goes right to the end of the wing and the rail would effect the flow of air over the end of the aileron. 🤨
Nope. Flying without the missile rails has no affect what so ever in the flight or structural integrity of the wings. Having an aileron flutter at 140 mph does.
Who puts nylon servo arms on a turbine? Another classic case of the crash being built in on the table. Been flying for 40 years. Everything I've ever owned larger than a .40 size Pylon of Fun Fly ship has always had aluminum arms. And by the time I got to 30% and up, I wouldn't even use offbrand aluminum arms. Had to be name brand stuff. The loads these RC aircraft see is quite amazing. Even throttle servos were metal geared in m y big ships. Shame she was lost, but man, I cannot believe not a single person pointed that out...
I used nylon arms all the time on my BVM jets and never had a failure.
Yep. Left aileron flutter, sadly leading the the expected outcome.
This is why I will never buy an RC plane. I could not cope with such a disaster. I am very happy to attend and watch other people fly theirs. Their thrills, their responsibilities, their $$$$$.
You can find relatively cheap RC models. It’s a great hobby and definitely worth any potential risks to the airframes. It sounds like you are around the hobby if not involved in some capacity. Don’t let crashes dissuade you from buying a plane. There are actually free plans online that can be used to build airplanes made of dollar tree foam board. That’s a total airframe cost of less than 10 dollars. Less than 5 in some cases. You don’t need a $20,000 Turbine jet to have fun. A simple EDF (or even a propeller powered airplane) can be incredibly fun and relaxing to fly!
@@AerospaceMatt Thanx for that. Very inspirational !I have since discovered a local RC Aircraft club and will pay them a visit.
@@AerospaceMatt "(or even a propeller powered airplane) can be incredibly fun and relaxing to fly!" I would guess that most planes are prop driven.
@@dynevor6327 There are quite a few Electric Ducted Fan powered RC jets on the market. The Freewing brand over at Motion RC is solely dedicated to EDFs. I reference jets because that’s what is shown in this video. I would say that propeller powered airplanes are more relaxing, but jets can be too.
@@dynevor6327 Motion RC Freewing brand is dedicated to RC jets, albeit foam Electric Ducted Fan powered ones. There’s certainly a lot of propeller planes out there as they are easier to fly and land, but quite a few jets as well. Some are relatively cheap, too. While propeller planes are pretty relaxing most of the time, jets can be too.
You forgot the glue mate
😨😨😨
Did the pilot have time to eject?
He survived lol!
DIdnt you see the virtual parachute?
BVM quality!
Camera man could use some training
Same issue happened with me these f 18 bvm had elevator’s problems and you can’t fly it without gyro obviously it’s not a good manufacture since jet legend produces
I have as many BVM jets (including an F-18) and more as Andy and I have never seen a jet come apart because you didn't use a gyro, that's complete BS. You might not like the answer Andy provided but could go and just assume your a poor pilot and flew you it into the ground. The only known flutter I have seen in a last few years on any jet with the T1 F-22 tail area, but they seem to have fixed that issue.
YOU obviously don't know quality when you see it. I've had their F 16 and the F 18 and everything in these planes are first rate. In addition, I know how hard Rob and the whole BVM team works towards getting everything right before they bring one to market. Then there's the invaluable product support that company makes available to anyone who has bought one of their planes.