F
F
L
L
I
I
G
G
H
H
T
T
M
M
A
A
N
N
U
U
A
A
L
L
Document No.:G304MS/AFM
Date of Issue: 07/14
4-24
Approved
Example
If required load is 4 l, than seal holes marked from 0 to 3 l. All
excessive water over 4 l will leak through the hole marked 4 l.
Drainable tail water ballast tank
Drainable tail water ballast tank is located inside of the fin – above
the permanent tail water ballast tank, in front of the fin spar.
Contamination of the filling water must be avoided. Before water
ballast is added, check the table in section 6.5 for the maximum
weight of water ballast.
The total capacity of the permanent tail water ballast tank is 6 liters
(aprox. 1.32 UKgal, 1.58 USgal).
Drainable tail water ballast compensates wing water ballast tank
load and allows to pilot maintain the flight C.G. position at optimum
range. It should be used only for flights with wing water ballast.
Filling hose is located under the elevator lid on the right side of the
side rudder. This filling hose could be connected with the
appropriate filling can by tube of max. outer diameter 6 mm (0.234
in.).
CAUTION
Tank must not be pressurized, e.g. fill directly from the water
hose.
The tank has six (6) spill holes on the port side, all properly marked
from 1 to 6 l according to the ballast to be filled. The venting of the
tank is through the uppermost 6 litre hole (which always remains
open – even with full tank).
The ballast quantity to be filled depends on the wing water ballast
load – see loading table at section 6.5.
Seal all the holes bellow the hole with marking the load to be filled.
Both wing tanks and drainable tail tanks are controlled by the same
lever. Let the actuating lever in "closed" position before filling.
The water ballast is dumped through the valve on the bottom of
fuselage aft of the fin shear web. It takes about 3 minutes when the
tank was full, i.e. tail ballast is dumped faster than wing ballast.
