JMB VL-3E-1 Evolution - Weight and Balance; Introduction; Weight Limitations; CG Calculation and Example

VL-3E-1 Pilot Operating Handbook
date of issue:
30/39
6. Weight and balance
6.1 Introduction
This sections contains the payload range within which the VL-3 Evolution aeroplane may be safely
operated. Procedure of weighting the empty aeroplane is showen in the VL-3 Maintenance Manual – chapter
1.5 Aeroplane empty weight and centre of gravity.
6.2 Permitted payload range
6.2.1 Weight limitations
Maximum take-off weight ……………………….……. 472.5 kg
Operating C.G. range ………………………………….. 21 - 34 % M.A.C
6.2.2 CG calculation
Empty weight (see 2.7) m
pr
[kg]
Pilot weight m
p1
[kg]
Copilot weight m
p2
[kg]
Fuel quantity vp [litr]
Baggage weight m
z
[kg]
C.G. of empty aeroplane (see 2.8) x
bsat
[%]
Wing leading edge position x
NH
= 540 mm
M.A.C. displacement x
SAT
= 68 mm
M.A.C. b
SAT
= 1236 mm
Weight m = m
pr
+m
p1
+m
p2
+vp*0,725+m
z
C.G. position
m
m+vp+m+m+
bx
m
=x
zp2p1
satbsat
pr
14672150.725682682
100









xt =
x
b
SAT
×100
Example
Empty weight m
pr
= 301kg
Pilot weight m
p1
= 100 kg
Copilot weight m
p2
= 0 kg
Fuel quantity vp = 45 litrs
Baggage weight m
z
= 10 kg
C.G. of empty aeroplane x
bsat
= 17.1 % M.A.C
Take off Weight
m = m
pr
+m
p1
+m
p2
+vp*0,725+m
z
= 301+100+0+45*0,725+10 = 443,6kg