At first I thought down elevator instead of up caused the crash but indeed you can hear the flutter just before it dives into the ground... Sad and sorry for your loss it was a beautiful plane.
It is from the control surfaces not being strong enough to overcome the air speed, weak linkage, servos, or even the surface itself can cause it and when it happens you must slow down to stop it. Flutter can tear your plane apart in the air without hitting the ground. Being up high would help if indeed you slowed down fast enough. Flutter is usually very violent and rips things apart.
Amazing! This is exactly the situation, I experienced on my 3.5 Meter ASW 24, while doing a dive! My buddy shouted "watch out, she's lowering her "ears" (=wings / wing tips, which means "undercut"), and I either noticed that she did not react in any way on pulling the elevator! My buddy shouted "Spoilers! Spoilers!" so I did, and that obviously rescued my ASW24, as she regained to react on elevators! but that has been in a much greater height than yours! So you definetly had no chance to react! Sorry for your loss!
That speed with a Ventus should not have been a problem. Not sure what kit it was but maybe not a good one. What can happen is poorly built wings will at high speed twist into a negative position and dive in.
The horizontal stabilizer command failed, which is why this dive down in the last meters occurred. I don't believe it was caused by a movement of your hand. I think there is some design flaw. It is quite possible that at this speed the steering machine did not have enough power to push the horizontal stabilizer up. At a height of about 5 meters, a clearly perceptible flutter was heard and then the glider plunged down. The whirring sound the last meters before impact was a flutter. Be healthy! One learns every day while one lives!
@@dickiedick100 have ordered ASG-29 from Tangent... should come in 3-5 weeks 😁 Later I heard I was not only one with elevator problem on Topmodeltehnik gliders....
@@flying.fox987 i have the TopmodelCZ hotlinet "Nike". I found a weak spot on the fugelage at the beginning of the rudder. So I did not fly it anymore since I found that. Now I will try to make it stiff again with a layer of carbon on that place. I have to look off that will solve the problem.
Video ist alt.............; hab's erst vor kurzem entdeckt....... // kleine Frage: was macht Dich so sicher, dass der Rumpfhinterteil sich zuerst "verabschiedet" hatte ? / via slowmo im Video sieht man das nicht + Absturzbilder zeugen auch nicht unbedingt davon.... // wie sieht es betr. der Vne-Frage aus ?
@@theresnobodyhere5778 servo is strong enought, its Futaba BLS-451... very precise servo... Whole horizontal tail got flater :/ When you loose horizontal tail on any airplane/glider, nose goes down...
@@flying.fox987 Really tragic, but usually it is only the control surfaces that flutter, finding or guessing the cause is very hard sometimes. generally due to as you said overspeed, but what failed first is always the question or was there something other than the speed that initiated the flutter. weak tail boom, servo at its limit when you pulled up elevator, who knows. I did not hear the flutter on the video before you started to pull up, but I was not there and the music was a little loud. I experienced flutter on an ASW27 5 meter but luckily landed with one aileron ( I had altitude to recover), another time with a 5.8 meter Bruckman Swift 42% I exceeded the VNE in a vertical maneuver, what actually failed first is unknown, but an aileron fluttered and transferred the harmonics to all the ailerons , I was able to pull out, and landed the plane thankfully with rudder and elevator alone. The wing was full carbon layup, so it was rigid enough, servos were JR 8411 with over 200 in/oz of torque. The forces are amazing in these circumstances. The sound is one you never forget.
@@flying.fox987 could it be the problem with linkage? I’ve seen recently that in DS (Dynamic Soaring) one of the steps they made to go even faster was to have servo horns PARALLEL to the pushrods to make it more rigid.
So you basically lost elevator control? The elevator servo was mounted in the cockpit area and running a cable pushrod up the vertical stab to the elevator? The elevator servo should have been mounted in the vertical stab with a direct, solid pushrod to the elevator. Just my opinion. Sorry for your loss.
