Rotax OM-912, Operator'S Manual

Page: 38 / 64

Effectivity: 912 Serie BRP-Rotax page 10 - 8
OM Edition 1 / Rev. 0 Jan. 01/2007
d03934
.fm
Performance data for variable pitch propeller:
Engine operation is permitted without restriction between full thrott-
le performance and power requirement of propeller, providing engi-
ne speed over 5500 r.p.m. is restricted to 5 minutes.
However, for economic reasons it is recommended to run the engi-
ne in accordance with the following table:
10.1.2.2) Performance graph for non-standard conditions
The following graph shows the performance drop with in-
creasing flight altitude. The curves show the performance
at 5800, 5500, 5000, 4800 and 4300 r.p.m., at full throttle.
The engine allows operation with fully open throttle valve
over the whole r.p.m. range, without limitation. But full
throttle performance above 5500 r.p.m. is limited to 5 mi-
nutes.
At deviation of temperature conditions from standard at-
mosphere conditions the engine performance to be ex-
pected can be calculated from the performance
indicated, multiplied by standard temperature, divided by
actual temperature in °K.
Engine Power-
Setting
Engine speed
[rpm]
Performance
[kW]
Torque [Nm] Manifold pres.
[in.HG]
Take-off perform. 5800 73,5 121,0 27,5
cruising power 5500 69,0 119,8 27
75% 5000 51,0 97,4 26
65% 4800 44,6 88,7 26
55% 4300 38,0 84,3 24
10
20
30
40
50
60
70
80
0 1000 2000 3000 4000 5000 6000 7000
7500
5800 U/min Vollast
take off performance
5500
Le
is
tung / P
e
rforma
n
c
e
[
K
W]
Dichtehöhe / Density Altitude [m]
4300
4800
5000
5800
Effectivity: 912 ULS / S
P
akt. =
P
stand.
T
standard
T
aktuell
-----------------------
05482
T[K] = t [°C]+273
fig. 14