Zlin Aviation
Section 1
Maintenance Manual Aircraft Maintenance Manual
Issued: 01/02/2006
QAP-AMM-Rev02
Date of latest Revision: 23/01/2013
Page Number: 1-7
1.1.5 ENGINE SPECIFICATIONS
Engine Manufacturer: BRP Powertrain GmbH (Former Rotax GmbH).
Standard Engine Model: 912 UL
Optional Engine Model: 912 ULS
Optional Engine Model: 914 115hp or Zlin 912 Super 120hp (turbo versions)
Engine Type 912 ULS: Normally-aspirated, liquid/air-cooled, dry sump, mechanical reduction
drive, dual carburetor-equipped, four-cylinder, four-stroke, electronic dual ignition, horizontally-
opposed cylinders with 73.91 cu.in. displacement.
Horsepower Rating and Engine Speed: 912UL: 80 BHP at 5800 RPM
Horsepower Rating and Engine Speed: 912ULS: 100 BHP at 5800 RPM
NOTE:
refer to Engine Operators Manuals (Ref: OM-912) for official specifications and
operational limits.
Description
912 ULS
Bore
84 mm (3,31 in)
Stroke
61 mm (2,40 in)
Displacement
1352 mm3 (82,5 in3)
Compression rate
10,5:1
GENERAL LIMITS OF OPERATION
Operating speeds and limits (912 ULS)
Speed
Take-off speed...............................................5800 1/min (5min.)
Max. continuous speed..................................5500 1/min
Idle speed.......................................................approx. 1400 1/min
Performance ISA (International Standard Atmosphere):
Take-off performance.....................................73,5 kW at 5800 1/min
Max. continuos performance........................69 kW t 5500 1/min
Acceleration
Limit of engine operation at zero gravity and negative « g » conditions
Max..................................................................5 seconds at max. -0,5 g
Oil pressure
Max...................................................................7 bar
Caution: for short period admissible at cold start
Min....................................................................0,8bar(12psi)(below 3500rpm)
Normal..............................................................2,0-5,0bar (29-73 psi)(above 3500rpm)
Oil temperature
Max....................................................................130°C.......(266°F)
Min.....................................................................50°C.........(120°F)
Normal operating temperature............................approx. 90 – 110°C...(190-230°F)
