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At least two people have expressed their opinion that the 2" jack pads are

not sufficient to support the weight of the aircraft.  I beg to differ on

this.  If the jack points are sufficiently beefed up on the inside, they are

more than adequate.  As shown in the construction manual, a piece of 1/4 x 2

x 2 phenolic is potted into the belly pan.  Probably, the 2 bid over the top

of the phenolic is not enough.  When I built my 320, I made a large flox

fillet up to the main spar and close out rib and covered that with an

additional 2 bid.  This structure is strong enough to transfer the load to

the main spar.



May I suggest to those of you who are using 2 x 4 structures etc. to support

your aircraft during construction that you need to think beyond the building

stage.  After your aircraft is flying you will periodically need to jack up

your airplane for gear retraction testing on the ground, annual inspections,

general maintenance etc..  Hopefully, you will have a jacking system that is

convenient and easy to use.



Happy Building

Bob Jude

N65BJ