C-GMBP

Following are the details of the new Weight and Balance on the Eagle, C-GMBP, done in April 2013

Overview:
The plane was weighed using a high quality mechanical scale on each of the main gears, one at a time, and a bathroom scale on the tailwheel.
We were able to take several measurements in order to validate the numbers with a pilot and without a pilot.

Configuration of plane:
The plane is configured with 30 Liters of fuel, and with everything, including the ELT, removed from the turtledeck.
A second set of weights were taken with Miles in the cockpit, as well as Pat in the cockpit. These numbers were run thru the calculations to validate the station for the pilot seat, which as it turns out is a bit off.

Raw Data:

Configuration	Left Main	Right Main	Tailwheel	Total
Empty (30L)	543 lb	536 lb	79 lb	1158 lb
Miles & parachute (191 lbs)	600 lb	593 lb	151 lb	1344 lb
Pat & parachute (225 lbs)	625 lb	618 lb	162 lb	1405 lb

Calculating the CG of the measured plane uses the following formula:
CG = D + ((R*L)/W)
where:
D = the Datum of the main wheels (79.31")
R = Weight at Tailwheel (79) (Note: datum of TW = 235.38)
L = Distance from Mains to Tailwheel (235.38-79.31 = 156.07)
W = Weight of Plane (1158)

CG = 79.31 + ((79*156.07)/1158
CG = 89.96

Weight and Balance Calculation:

Item	Weight (lb)	Station (in)	=	Moment
Empty (30L)	1158	89.96	=	104173.68
Less 30L of fuel	-53	86.25	=	-4571.25
True Empty Weight	1105	90.14	=	99602.43

Weight and Balance Worksheet:

Item	Weight (lb)	Station (in)	=	Moment
Empty	1105	90.14	=	99602.43
Pilot (Pat)	225	143.37	=	32258.25
Passenger	0	111.32	=	0
Fuel (100 Liters )(25 Gals)	160	86.25	=	13800.00
Total	1490	97.76	=	145660.68
Fuel Burned off ( 50 Liters)(13 Gals)	-80	86.25	=	-6900.00
Total	1410	98.41	=	138760.68

Item	Weight (lb)	Station (in)	=	Moment
Empty	1105	90.14	=	99602.43
Pilot		143.37	=
Passenger		111.32	=
Fuel (100 Liters )(25 Gals)	160	86.25	=	13800.00
Total			=
Fuel Burned off ( 50 Liters)(13 Gals)	-80	86.25	=	-6900.00
Total		98.41	=