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%
10.1.1.2) Performance graph for non-standard conditions
60
5800 1/min Vollast
take off performance
5500
50
5000
4500
40
4000
30
20
10
0
1000 2000
Dichtehöhe / Density Altitude [m]
00452
Effectivity: 912 UL / A / F
OM initial issue
Engine speed Performance
[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, 4500 and 4000 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.
3000 4000 5000 6000
AIRCRAFT ENGINES
Torque [Nm]
(kW)
59,6 98,1
58,0 100,7
43,5 83,1
37,7 75,0
31,9 70,8
At deviation of temperature
conditions
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.
P
= P
act.
T [K] = t [°C]+273
fig. 11
7000
Manifold pres.
[in.HG]
full throttle
full throttle
27,2
26,5
26,3
02721
from standard
T
standard
stand.
T
actual
page 10 - 4
July 01/98