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Tom,
from the pictures it seems you have the small tail!
you can use 11% mac instead of 15%
I use following CG with my IO-390 and big tail:
My FS 0 is back of spinner, Firewall Back is FS 100,50 cm, CG=158,08 cm
- 177,03 cm
Empty weight 540kg = 1190lbs
(FS 22,8in. und FS 30,3in. (FS 0 = Firewall Rear) with 11% (original 15%)
Your trim tab seems to small. Maybe the spring load trim would be a better
solution for you?
Christian
L-390
OE-VCM
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LANCAIR 320/360 CG LIMITS
Recently both Orin, with his MK-II tail and Doug, with his standard tail
configured 320 performed some flight tests with adjusted fwd CG's.
Basically, they flew with a slightly forward CG to define how much farther
forward acceptable flight and most importantly, flair to a landing could be
maintained. the standard, smaller tailed 320's played out a little sooner
but a fwd limit of 11% worked quite nicely. both reported good authority at
the flair and enhanced stability as they moved the CG forward. This 11% of
MAC should be considered since it offers greater overall CG travel before
getting too far aft-which is ofcourse, something to be avoided.
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