|
|
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
<< Lancair Builders' Mail List >>
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
I must put in a plug for the jack pads as provided in the 320/360 kit. As shown in my standard kit (slow build) manual, loads would not be sufficiently transferred from the pads to the structure. I extended all the bid plies that create the fuselage/wing spar junction down across the jack pad. I overlapped the plies coming down the side of the fuselage and those coming down the rear of the spar. This creates something like a 20 ply lay up in the corner right above the pads. Jacking loads are thus nicely distributed along the spar and fuselage.
I agree with the comments warning against lifting the plane from the engine lift ring. There is probably a good reason 6 cylinder Lycomings have 2 lifting rings. Also you generate large bending moment in the fuselage center section, similar to a high negative G maneuver.
Chris Zavatson
N91CZ
|
|