by flyalaz » Mon Oct 24, 2005 3:32 pm
Hi Russell,
The upper four remaining rivets are only common to the wing attachment plates and associated spacers. When the three rivets on each side of the centre bolt sheared, in allowed the entire clevis assembly (wing attachment plates) to rotate on the control support tube attachment bracket, which is attached to the fuselage tube end cap with the bottom six rivets as well as the six sheared rivets and centre bolt.
Maybe someone out there knows if there were any other incidents of this type. I only know of this one, and it was enough to make me do the mod. It was already apart, and two bolts for peace of mind was a cheap price to pay. My other Lazair does not have this mod done to it, and I still have full confidence in the design. I will never make that type of mod (third engine) to my plane, and am content to fly it in the envelope it came in!
Cheers,
Karl