ENGLISH
14
INTRODUCTION
Thank you for purchasing the Tomahawk BlackStar 5-250, one of the finest engines in the market
place today. Tomahawk is committed to you having a positive experience and a lifetime of great
operation with your new engine.
It is important that you read the engine manual before starting the engine for the first time. Black
Star radial engines have different requirements than engines that you may have operated in the
past. The manual provides important information for installing the engine, selecting the correct
propeller, fuel requirements, proper engine break-in procedures and maintenance routines.
ENGINE SPECIFICATIONS
Engine
BlackStar 5-250
Type
Spark Ignition
Cylinders
5
Capacity
250 cc / 15.2 cu. in
Capacity per cylinder
50 cc / 3.06 cu. in
Bore
39.5 mm / 1.57 in
Stroke
41 mm / 1.57 in
Power
14.7 hp approx.
RPM range
1000 - 5500
Maximum RPM
6000
Engine diameter
286 mm
Engine length
211 mm
Weight
5.7 kg (Iginition & Propeller Screw included
Fuel usage
50 ml / 1.75 oz per minute
Propellers
2-Blade: 32 x 12“ / 32 x 18“ / 35 x 13“ CFK
3-Blade: 28 x 18“ / 30 x 16“ / 29 x 16“ / 32 x 13“
Test stand speed:
2 blade - propeller Menz S 32x18 (alternatively SEP 32x16 or
33x14) all about 4300rpm
Igintion
Electronic, 2S LiPo directly
NEEDED TO COMPLETE
2-Stroke Oil (Fuchs Titan 100s)
Engine baffles
Propeller
Electric ignition battery (2S LiPo 7.4V or NiMH 6V)
Fuel line (3.5 mm ID)
Electric ignition switch
Engine mounting screws
