Jonker Sailplanes JS-MD 3 - Non-expendable Tail Tank

JS-MD 3
Aircraft Flight Manual
MD10-AFM-00-001
Issue: 01
Rev. 00
Rev. Date: 14-Feb-20
Page 6-15
Non-expendable tail tank
Adding water to the non-expendable ballast tail tank moves the CG
rearwards. The required minimum cockpit weight increases when water
is added to the tail tank.
Table 6.4-5 indicates the maximum weight and moment arm of the non-
expendable ballast tank.
Load point
Mass
Moment arm
kg
lbs
mm
inch
M
Tail2
Non-expendable tail tank
~8.9
~19.6
4510
177.6
Table 6.4-5
Table 6.4-6 indicates the maximum weight and moment arm of the two
split non-expendable ballast tanks.
Load point
Mass
Moment arm
kg
lbs
mm
inch
M
Tail2
Non-expendable tail tank
(bottom)
~5.0
~11.0
4495
177.0
M
Tail3
Non-expendable tail tank
(top)
~3.9
~±8.6
4574
180.0
Table 6.4-6