R
EVISION
:
-
D
ATE
:
12/29/04
P
AGE
:
10
Copyright
2004 Glasair Aviation, LLC Arlington, Washington All rights reserved
5-3.1 F
ORWARD
CG L
IMIT
C
HECK
The FARs specify that the forward limit check be performed using the
maximum
weights of items located
forward
of the forward CG limit and
the
minimum
weights of items located
aft
of the forward CG limit. In
the Sportsman, all items of variable weight—pilot and passenger, fuel
and baggage—are located aft of the forward CG limit (Station 95.6), so
the forward limit check conditions are:
no passenger, minimum fuel
and
no baggage
.
The FAA standard pilot weighs
170 lb
. The standard formula for
calculating minimum fuel is as follows:
Thus, for our prototype with a 180 h.p. engine, the minimum fuel is
15
gal
. Calculate a minimum fuel figure for your Sportsman and enter the
result here:
M
INIMUM FUEL
__________
NOTE
If you weigh
less
than 170 lb., you have the
option
of using
your own weight to perform the forward and rearward CG limit
checks. However, the converse is
not
true; if you weigh more
than 170 lb., you
must
use the 170 lb. standard weight.
Minimum Fuel =
Engine h.p.
12