KJC
FRIEND
Clear Lake, MN
My PA-12 is slightly left wing heavy and I would like to start the entire rigging process over to make sure it's correct. I'm familiar with both the L-21 Erection Manual and ac 43-16. The dihedral was set using the string method and both wings are symmetrical. I used the fish line method and measured 3 1/8 from the top of the spar near the the wing attach fitting as instructed. Because the aircraft has extended wings with booster tips, I'm not sure this method will produce entirely accurate results.
I understand my heavy wing is probably a a washout issue and a turn in on the left rear lift strut will probably fix it. What I'm asking about is DIHEDRAL not washout (or twist if you prefer).
With the the aircraft leveled, is there a proper number (or at least agreed to by most) for DIHEDRAL when measured under the front spar using a digital level? Both wings are currently set at .81 degrees with an equal number of threads showing on each fork.
I understand my heavy wing is probably a a washout issue and a turn in on the left rear lift strut will probably fix it. What I'm asking about is DIHEDRAL not washout (or twist if you prefer).
With the the aircraft leveled, is there a proper number (or at least agreed to by most) for DIHEDRAL when measured under the front spar using a digital level? Both wings are currently set at .81 degrees with an equal number of threads showing on each fork.