I am working on an initial weight and balance for my Europa XS and I was
wondering how the baggage arm listed in the Europa manual came about.
Does anyone know, and is it worth thinking about?
Page 6-4 of The "XS Trigear Owners Manual=9D, Issue 7, January
2015, shows the arm for baggage at 88. The weight and balance arm
measurements are taken starting at the rear of the joggle for the
cowling, which is at Fuselage Station FS 29.25.
As I measure it, the bottom of the D-panel bulkhead at the back of the
baggage area is at 94.5=9D aft of the joggle, which is FS 103.75.
A typical carry-on bag is 23 inches tall, and I expect the CG for that
in the aircraft would be about at the mid-point, or 11.5 inches forward
of the base of the D panel bulkhead.
The result of 103.75 - 11.50 is an arm of 92.25, not 88.
Six and a half (6.5) inches in the baggage arm does make a difference
with full bags loaded onboard. And CG calculations do need to be based
on what I are putting on board and where those things are actually
located.
However, I expect using 88 is close enough - unless it looks like I am
getting close to the limits, which I would think should be seldom, if
ever.
Right?
Regards,
Jeff Williams
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