DG Flugzeugbau LS8 - Control Surface Mass and Mass Balance; Data

Maintenance Manual LS8
Issued: June h 2016 TN8024
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
5-2
5.2 Control surface mass and mass balance
Should be inspected when suspecting changes of mass and after repairs
5.2.1 Data
Mass and mass balance must be within given limits for safety against flutter
(1 cm*kg = 13.887 in*oz)
LS8
Mass Hinge moment Horizontal reference
line
Inner
Aileron
0.73 to 0.97 kg 2.33 to 3.15 kg*cm
Leading and trailing
1.61 to 2.14 lbs 32.36 to 47,74 in*oz
edges of under
Outer
Aileron
1.30 to 1.76 kg 3.43 to 4.63 kg*cm
side connected
2.87 to 3.88 lbs 47.63 to 64.30 in*oz
Elevator
1.30 to 1.60 kg 3.48 to 4.40 Straight region
both halves
together
2.87 to 3.53 lbs 48.33 to 63.88 in*oz
of upper side
Note: mass balancing of the elevator (approx. 100 %) is by a heavy pushrod in
the fin see section 5.2.2
Rudder
3.90 to 4.90 kg ± 7.40 kg*cm Centreline
8.60 to 10.80 lbs ±102.77 in*oz
In case a spare rudder ser.No. 28531 and uü is installed, TN8025
4.00 to 6.00 kg ±1.60 kg*cm Centreline
Rudder
8.82 to 13.23 lbs ±22.2 in*oz
LS8-a
Mass/mass Hinge moment Horizontal reference
line
Aileron
2.16 to 2.86 kg 5.67 to 7.50 kg*cm Leading and trailing
without
balance
4.76 to 6.31 lbs 78.7 to 104.2 in*oz edges of under
Aileron
3.40 to 4.40 kg 2.04 to 3.87 kg*cm side connected
with balance 7.50 to 9.70 lbs 28.3 to 53.7 in*oz
Elevator
1.30 to 1.65 kg 3.48 to 4.60 Straight region
both halves
together
2.87 to 3.64 lbs
48.3 to 63.9 in*oz
of upper side
Note: mass balancing of the elevator (approx. 100 %) is by a heavy pushrod in
the fin see section 5.2.2
Rudder
4.00 to 6.00 kg ±1.60 kg*cm Centreline
8.82 to 13.23 lbs ±22.2 in*oz
Note for LS8-a: Ailerons with balance will be installed in case the LS8-a is
prepared for retrofit to LS8-18.