CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 10 – POWERPLANT
Date of issue: 2015-09-23
Revision No.: 15
10 - 3
10.1 General
Power unit of PS-28 Cruiser airplane is the ROTAX 912 S2 or 912 ULS2 engine and
- Woodcomp Klassic 170/3/R ground adjustable 3-blade propeller or
- Sensenich 3B0R5R68C ground adjustable 3-blade propeller
10.2 Description and operation
10.2.1 Engine
The engine ROTAX 912 S2 / 912 ULS2 is a four-stroke, four-cylinder, opposed - cylinder
engine, central cam shaft and OHV - mechanism with maximal power of 73.5 kW (
98.6 HP)
at
5,800 rpm.
Technical data of the engine:
Engine manufacturer:
BRP-Powertrain GmbH&Co.KG
Engine type:
ROTAX 912 S2; 912 ULS2
Power:
max. take-off
73.5 kW
(
98.6 hp)
max. continuous
69.0 kW
(
92.5 hp)
RPM:
max. take-off
5,800 rpm max. 5 minutes
max. continuous
5,500 rpm
idle
1,400 rpm
Cylinder head temperature CHT:
max.
135 °C
(
275 °F)
Coolant Temperature CT: *
max.
120 °C
(
248 °F)
Oil temperature:
max.
130 °C
(
266 °F)
optimum operation
90 – 110 °C
(
190 – 230 °F)
Oil pressure:
max.
7 bar
(
102 psi)
min.
0.8 bar
(
12 psi)
optimum operation
2 - 5 bar
(
29 - 73 psi)
Fuel pressure:
max.
0.4 bar
(
5.8 psi)
min.
0.15 bar
(
2.2 psi)
*
With the change to a new cylinder heads design (for the ROTAX 912 ULS2 engines from S/N
6 781 410 inclusive and for 912 S2 engines from S/N 4 924 544 inclusive, or on all engines with
type designation followed by suffix-01, or on all engines which have been later equipped with
the new cylinder heads design of P/N 413185 at cylinder head position 2/3), no longer the
cylinder head temperature (CHT) is measured, but the coolant temperature (CT).
Coolant type:
Refer to the Rotax Operator’s Manual, Section 2.2 Operating limits, and Section 2.3 Operating
media - Coolant; the Rotax Installation Manual - Cooling System; Rotax Service Instruction SI-
912-016.
Old cylinder head design:
(CHT measurement method, engine type marking without suffix -01)
In principle, 2 different types of coolant are permitted:
•
Conventional coolant based on ethylene glycol (with 50 % of water)
•
Waterless coolant based on propylene glycol
