I have flown my KR-2 with aft cg. How much percent is unknown. Weighing
the aircraft for cg numbers does get definite numbers for cg , but knowing
the center of lift can be a guessing game. The "standard" KR-2 with RAF 48
airfoil does have an error in the published cg range; offset is about 2
inches forward. One measure of flying with aft cg is the elevator trim tab
setting. For neutral trim, the elevator trim tab would be set even with the
elevator during cruise flight. To make the test measurement: set the trim
tab for hands-off stick and level flight cruise. Proceed to land, but do
not change the trim tab setting. Get out and look: If the elevator trim tab
is above the trailing edge of the elevator, the plane likely has an aft cg,
the larger the angle, the worse is the aft cg condition. Incidence angle
for the horizontal stabilizer will also mask an aft cg issue.
Sid Wood
Tri-gear KR-2 N6242
California, MD, USA
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Someone flown with the center of gravity more than 30% of the CAM? (between
30% and 35%)
Saludos
Eduardo Barros
San Pedro, Bs. As., Argentina
Mail: [email protected]
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