DG Flugzeugbau GmbH
Flight Manual LS 8-18
Description of Systems
7.6 Electrical System and Operation
For electrical system principle see wiring diagram below. Power supply by 12V battery with a minimum
capacity of 5.7 Ah. In case of two batteries, a three position switch may be used as main switch. A
current limiting device must be used for each electrical user (microfuses or circuitbreakers).
When using circuitbreakers, a separate main switch is not required.
Position of fuses
:
Main fuse at battery
Single unit fuses at instrument panel lower
region.
Denomination
:
Microfuse 20*5 (DIN 41571)
Circuit breaker Klixon 7277-2, 7274-2 or
similar
Fuse ratings
:
max.
10
A for battery-main fuse
max.
5
A quick acting for radio
(Becker/Dittel types)
max.
1
A quick acting for electrical
variometers and turn and bank
indicators
Cross section of cables
:
Battery cable min. 1 mm² (corresponds to
AN 20 cable)
7.7 Pneumatic System (Static- and Pitot-Pressure)
Pitot pressure port:
1
at vertical tail fin below TE port
Static pressure ports:
2
for airspeed indicator and altimeter – lower forward fuselage side
statics
3 + 4
for variometers – upper forward fuselage side statics and boom
TE-port:
5
at upper vertical tail fin end
1
Fin pitot
red
2
Lower forward statics
blue
for airspeed and altimeter!
3
Upper forward statics
clear 6mm ø
4
Rear boom statics
yellow
5
TE-port
green
6
Vacuum bottles for variometers
clear 8mm
ø
When connecting an electrical variometer with electronic compensation, coupling boom statics (yellow)
with upper forward statics (white 6 mm) near the instrument is being recommended. This results in better
compensation.
Edition: July 1999
Revision - 0
Page 7-5