This applet will calculate the center of gravity for our aircraft, and let you know if it is within allowed limits.
Here's the data I used in calculating the value. I couldn't find anywhere in the Arrow manuals where it said what the maximum usable fuel was, or if the unuseable fuel is included in the empty weight. Anybody know?

It is the responsibility of the Pilot In Command to verify that the values calculated here are correct

1436U
Station	Arm
Front Seat	37
Rear Seat	73
Fuel	47.8
Baggage1	95
Baggage2	108
Maximum Gross Weight	2300
Maximum Fuel	38 gal.
Maximum weight in baggage 1	120
Maximum weight in baggage 2	50
Maximum total baggage weight	120

4669J
Station	Arm
Front Seat	85.5
Rear Seat	118.1
Fuel	95
Baggage	142.8
Maximum Gross Weight	2500
Maximum Fuel	50 gal.
Maximum weight in baggage	200