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Forum: ARF or RTF

11-17-2007, 11:43 AM

Replies: 86

gp lancair wings snapping

Views: 9,193

Posted By jrf

RE: gp lancair wings snapping

TIANCI:

Make sure that the aileron servos are securely mounted. The recommended method is not very reliable and if one of the servos comes loose the aileron will flutter, usually tearing a wing...

Forum: ARF or RTF

11-14-2007, 05:09 PM

Replies: 86

gp lancair wings snapping

Views: 9,193

Posted By jrf

RE: gp lancair wings snapping

Chris:

It is a sad time for you I'm sure, and I am only going on with this because I think it is important when something fails for those involved to understand how and why.

If the center...

Forum: ARF or RTF

11-14-2007, 03:12 PM

Replies: 86

gp lancair wings snapping

Views: 9,193

Posted By jrf

RE: gp lancair wings snapping

Chris:

I'm on your side. I hate see anyone lose a beautiful airplane like that. But....

It is obvious from the second photo that the center ribs were not glued together. The spar didn't...

Forum: ARF or RTF

11-12-2007, 11:46 AM

Replies: 86

gp lancair wings snapping

Views: 9,193

Posted By jrf

RE: gp lancair wings snapping

Rube:

The wing broke outside the joiner, at the side of the fuselage. The joiner is still there but it is hidden behind the rib. The failure was the bottom main spar cap failing in tension at...

Forum: ARF or RTF

11-08-2007, 09:25 PM

Replies: 86

gp lancair wings snapping

Views: 9,193

Posted By jrf

RE: gp lancair wings snapping

Ahhh... Sportflyer:

The grain is supposed to run up and down. The purpose of the shear web is to keep the spars from coming together. The stress on the webs is diagonal and it shifts 90...

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