"Leon" wrote:

The airplane is mounted at a 30 degree angle. I thought about using
a nut in the post but that would mean you would have to hold the 4'
square airplane at an angle and spin it 16~20 times to mount and
again to unmount. Actually I believe that it would be best if the
airplane would spin if forced, which convention folk will do. I
just don't want it to spin on its own or given a lite tough.
Essentially the method you are describing will be used at the
airplane to stud union.

Setting the airplane stud in the mounting hole quickly will be a
great advantage.
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Took a look at pics, Haven't yet figured out how the pooch is going to
help.

Is he the job superG?

The following is based on you having access to metal working and
welding.

Picture a pipe flange. It will give you an idea of what I'm about to
describe.

Start with a 1" dia x 3" long CR1018 CRS and drill a 1/2" dia x 2"
deep hole.

From the opposite end, drill and tap 8MM threaded hole, 1-1/8" deep.

This eliminates drilling an tapping the full 3".

Cut a 3" dia x 1/4" thick piece from CR1018 CRS.

Drill 12, 8 MM clearance holes, equally spaced on a 2-1/2" dia bolt
circle.

Drill a 1" clearance thru hole on centerline of 3" dia plate.

Position 1" dia x 3" long piece in flat plate with 8 MM thread up and
projecting
3/4" above plate, then weld.

Using white oak or similar hard wood, cut a 3" dia x 3" long piece,
then drill
a 1" dia thru hole. (Parallel to end grain)

Drill only one 8MM clearance hole x 1-1/2" deep on a 2-1/2" dia bolt
circle.

Mount this white oak piece in table at a 30 degree angle as req'd.

Thread 8 MM lock nut and weldment onto plane stud as req'd.

Drop weldment into white oak piece and rotate until hole in weldment
lines up with hole in white oak piece, then insert 8MM pin to prevent
rotation.

Line up plane to final position and lock in place with lock nut.

Grab a beer and greet the world with a **** eating grin.

Have fun.

BTW, if you can't find CR1018 CRS (Cold rolled), use CR 1020 HRS(Hot
rolled)

Lew