2) Performance Graph For Non-Standard Conditions10 - Rotax 912 series Operator's Manual

Performance data for variable pitch propeller:
Engine operation is permitted without restriction between full throttle
performance and power requirement of propeller, providing engine speed
over 5500 r.p.m. is restricted to 5 minutes.
However, for economic reasons it is recommended to run the engine in
accordance with the following table:
Engine Power-
Setting
Take-off perform.
cruising power
75%
65%
55%
10.1.2.2) Performance graph for non-standard conditions
80
5800
70
5500
60
50
40
30
20
10
0 1000
fig. 14
Effectivity: 912 ULS / S
OM Rev. 3
Engine speed
[rpm]
5800
5500
5000
4800
4300
The following graph shows the performance drop with increasing
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 minutes.
At deviation of temperature conditions from standard atmosphere
conditions the engine performance to be expected can be
calculated from the performance indicated, multiplied by standard
temperature, divided by actual temperature in °K.
5800 U/min Vollast
take off performance
5000
4800
4300
2000 3000 4000
Dichtehöhe / Density Altitude [m]
AIRCRAFT ENGINES
Performance
Torque [Nm]
(kW)
73,5 121,0
69,0 119,8
51,0 97,4
44,6 88,7
38,0 84,3
5000 6000 7000
05482
Manifold pres.
[in.HG]
27,5
27
26
26
24
T
P
= P
T
act.
stand.
T [K] = t [°C]+273
7500
page 10 - 8
July. 01/2004
02723
standard
actual