I recently lost a plane due to the rudder servo screws pulling out in flight. On inspection after the crash, I found that there was not a ply sub-structure beneath the balsa for adequate support for mounting the servo. I own two other planes from this manufacturer and all the basic sub-supports are there.

My question is this. Is the manufacturer of ARF.s responsible in any way for at least providing an adequate sub-structure for engine and servo mounting, or are we as purchasers responsible, even though we have to cut into the closed structures of the fuselage to do so?

When I informed GSP of the problem (by the way, nothing was mentioned in their written instructions), they responded promply with the following:

Dear Dr. Brown,

I am in China now & will pass your remarks to the factory.
. I am sorry for your problem, however you are the builder & it is your responsibility to check
your construction to determine if there is adequate support for the servo. We can not be
responsible for this problem….Again I am sorry …
Sincerely,
Irwin Siner
Hobbies & Helis International
Quick Worldwide
Giantscaleplanes.com
Quickheli.com[/center]
So I ask you guys. Who is really responsible.