BMW BOXER
1100
As
new flat Boxer engines the 1100 RS/ GS/ have been introduced years ago into
the quantity production. It is now time to let this technological top
performance of the engine building fly. As
a result of our experiences with The Boxer-engines as aircraft engines since
1988, according to the state of the art we realized our ideas about a modern,
high-performance propeller drive. For
ultralight planes this drive has been certified
since 4/98. It runs with very few vibration, is quiet,
extremely economical and strong. The
Highlights: Enormous power weight (to 0,77 kg/hp) Extremely
economical consumption (225 g/kW/h) Processorcontrolled injection Non-polluting
due to regulated 3-way catalytic converter Height
compensation by crusher gage sensor Continuous
duty depending on motor 43 - 74 kW (70 - 100 hp)
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Specifications: Consumption:
7 - 10l unleaded at 75 % Cooling
system: 65% oil - 35 % air Four-valve-technology:
separate oil cooling (50 l/h) for
the outlet valve Ignition
system: Motronic (characteristic control) with
emergency running control in case of breakdown of sensors Ignition
release mechanism: 2 independent Hall generators controlled by the crankshaft
Mixture
control: characteristic controlled injection system with sensors for
rotational speed, oil temperature, throttle control position, air
temperature, air pressure and lambda probe 3
bar pressure system in the injection system to avoid vapor
lock Environmental
compatibility: 3-way catalytic converter, HC-reduction about 85%; NOx-reduction about 80% Gear:
Helical,
with hardened and grinded gearwheels. Gear reduction: (2,46; 2,75; 3,05, 3,46
:1 possible) Springless, one-piece centrifugal
automatic-clutch (rotational speed of action 2800 1/min) Rotational
oscillation damper (absorbes rotational
oscillations of approx. +/- 10°) Total
weight when ready for take off including exhaust system, gear and coolant:
approx. No
other two-cylinder four-stroke engine has - caused by the pistons working in
an opposite manner - a so perfect mass balancing so that the flat engine
works without much vibrations even without weight increasing compensation
shafts. The mass balancing gets more optimal at higher rotational speed. For
the lower speed range the unfavorable traction
combination of the degree of non-uniformity of the engine and the moment of
inertia of the propeller is decoupled by a centrifugal clutch. A
rotary oscillation damper prevents resonances between engine, gear and
propeller. |