I made a sketch of my jack, but couldn't figure out how to attach it to this post.
I have a scissor jack I made out of a 2x4 and two door hinges. Its hinged in the middle and at the top where it contacts the spar cap. You put the top of the scissor against the bottom spar cap as far out on the center spar as you can. The bottom of the scissor rests on the ground at a slight angle so the jack is tilted slightly in and also tilted forward to match the tilt of the plane.
As you push in at the bottom of the top scissor handle (2x4 that extends down past the center pivot point), the scissors will go straight and raise the center spar about a foot. The scissors are designed so when they are straight, they'll go over center a little. When the scissors are overcenter, they are locked in the straight position and will not collapse.
The tire raises 2 - 3 inches depending on how the jack is positioned.
To lower it, pull (or push) at the bottom of the top scissor handle to get it to pop out of over center, As the jack hinges in the middle, the plane is lowered.
The plane must be resting securely on its nose so it can't roll while on the jack.
I'll get a photo and some dimensions and post them on my web site:
www.iflyez.comOH YEAH, With the retracts, its even easier.
I place my aft fuselage stand under the rear of the plane. I then extend the nose gear. As the nose comes up, the aft fuselage pivots down until its resting on the aft fuselage stand. With the aft fuselage resting on the stand, as the nose continues to raise, the main gear now comes off the ground and tires raise 2 to three inches.
Waiter