iS
G3-8 MA FM 9407 - R01
7
Airplane and Systems Description
Systems 7 - 54
7.13 Engine
general
The ROTAX 912 iS Sport is a horizontally opposed 4-cylinder 4-stroke
spark ignition engine with electronically controlled fuel injection. The
engine features one central camshaft, driving two overhead valves per
cylinder by push rods and hydraulic tappets.
Displacement is 1,352 cm with a compression ratio of 10.8:1.
Max. rated power for 5 minutes is 73.8 kW (100 HP) at 5,800 rpm,
max. cont. power is 75 kW (95 HP) at 5,500 rpm
The engine is rotating clockwise, seen from the back.
engine control
The engine features a fully redundant digital engine management and
control system (EMS), it includes fuel injection and characteristic igni-
tion.
fuel system
The engine is designed to be operated with no-lead fuel min. AKI 91
(min. MOZ87, min. ROZ 95). Only fuel acc. to
ROTAX Service Instruc-
tion SI-912i-001 in its latest revision may be used. Best are fuels with-
out water and/or ethanol. AVGAS may be used, but prevailing use re-
duces the oil change interval.
Fuel is fed to the engine by an electric fuel pump unit located under-
neath the fuel tank. Nominal fuel pressure is 43.5 psi (3 bar). The fuel
pump unit consists of two separate fuel pumps, one alone is sufficient
for safe engine operation. In normal operation, fuel is fed to the engine
by the main fuel pump. The auxiliary fuel pump serves as backup
pump. In case the main pump fails or does not deliver sufficient fuel
pressure, the aux pump will be automatically activated and the main
pump is switched off.
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Страница 198: ...Imprint Pilot Operating Handbook REMOS GXiS ASTM Edition Copyright REMOS AG REMOS 2017 all rights reserved...
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