RANS Inc.
Section 2
Model S-7LS COURIER
Operating Limitations
Revision A
January 08, 2008
2- 3
POWER PLANT LIMITATIONS
Number of Engines:
1
Engine Manufacturer:
Rotax
Engine Model Number:
912 UL/S
Horsepower rating and
Engine speed (ISA):
Maximum Takeoff (max off 5 min):
98.5 HP at 5800 RPM
Max. Continuous :
92.5 HP at 5500 RPM
Idle
(aprox.):
1400
RPM
►
The engine allows operation with fully open throttle valve over the whole RPM
range without limitation. But full throttle performance above 5500 RPM is limited
to 5 minutes.
Minimum Oil Pressure :
12 PSI
Normal Operating Oil Pressure :
29 to 73 PSI
Maximum
Oil
Pressure:
100
PSI
Minimum
Oil
Temperature:
120°
F
Normal Operating Oil Temperature:
190° to 230° F
Maximum
Oil
Temperature:
266°
F
Maximum Cylinder Head Temperature:
275° F
Engine Start, Operating Temperature:
Maximum:
120°
F
Minimum:
-
13°
F
Fuel Pressure
Minimum:
2.2
PSI
Maximum:
5.8
PSI
Acceleration:
Limit of engine operation at
zero gravity and in negative
g conditions:
5 seconds at max. –0.5 g
Fuel
Grade:
See
fuel
limitations
Oil Grade:
SAE Motorcycle oil of registered
brand with gear additives.
Use only oil with API classification
“SF” or “SG”. Minimum
recommended viscosity 10W-40.
For additional information refer to
ROTAX Operators - and
Maintenance Manual.
►
CAUTION:
Do not use aircraft
engine oil
Propeller Manufacturer:
Sensenich wood propeller Inc.
Propeller Model Number:
W72RR