Rotax 912-UL - 2) Performance Graph for Non-Standard Conditions

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page 10 - 8
Jan. 01/2007
Effectivity: 912 ULS / S
OM Edition 1 / Rev. 0
BRP-Rotax
10.1.2.2) Performance graph for non-standard conditions
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 calcu-
lated from the performance indicated, multiplied by standard tem-
perature, divided by actual temperature in °K.
T
standard
T
actual
02723
05482
Performance data for variable pitch propeller:
Engine operation is permitted without restriction between full throttle perfor-
mance 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:
P
act.
= P
stand.
T [K] = t [°C]+273
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
fig. 14
10
20
30
40
50
60
70
80
0 1000 2000 3000 4000 5000 6000 7000
7
500
5800 U/min Vollast
take off performance
5500
g[]
Dichtehöhe / Density Altitude [m]
4300
4800
5000
5800
Leistung / Performance [kw]