Help! How to avoid to happen?
 

How to avoid to happen ?? I have a GSP Extra-300S like picture, those pictures taken by my friend. I need some advisement.
please refer to attached pictures.

RE: Help! How to avoid to happen?
 

Uh...

RE: Help! How to avoid to happen?
 

Yashung, what exactly are you asking us to avoid?

RE: Help! How to avoid to happen?
 

LOL Skydude!!!!!!

RE: Help! How to avoid to happen?
 

skydude, that is effing HILARIOUS!! HAHAHAHAHAHHAHAHAHAHAHA![sm=lol.gif][sm=lol.gif][sm=lol.gif][sm=lol.gif][sm=lol.gif][sm=lol.gif]

RE: Help! How to avoid to happen?
 

Looks to me like the spar tube broke, but how? You need to give us more info. Don't know how to help.

RE: Help! How to avoid to happen?
 

Yep, it's a broken stab wing tube. About the only way you can do that is by levering the stab up and down while trying to put it on or take it off. The tube to tube fit was probably too tight, and rather than enlarge one or reduce the other, they tried to force it.

Next time, either enlarge the opening inside the stab a little, or use some 400 or 600 grit wet and dry sandpaper and carefully sand the aluminum tube by rotating the tube while you sand it. You want a snug fit. Not loose, not tight.

SkyDude, that was as good as it gets.:D

RE: Help! How to avoid to happen?
 

[&:] first-time testing fly with meek operation, unexpectedly, lose half stab. in air without any external force.
I don't know root-cause, how to avoid ?? thank's

mine plane

RE: Help! How to avoid to happen?
 

If it happened in the air, it had to be elevator flutter. There are books written about how to avoid flutter, but the basics are strong servos, stiff pushrods, minimum throws with maximum servo ATV and slow flying speeds.

Jim

RE: Help! How to avoid to happen?
 

LOL....Priceless!!!!!!!!!!!!!

RE: Help! How to avoid to happen?
 

think you got it. Think with the bad google translation he used he was referring to it falling off and how to avoid it.

Yashung - rebuild it and refer to jrf's post about how to avoid the problem

good luck and welcome to the forums :D