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Description "UMS Tomahawk Black Star 5-250 V4 radial engine"
The BLACK STAR 5-250 is a 4-stroke radial engine and was developed over a period of 18 months together with experienced German engine specialists.
A high quality of workmanship, durability and a good price / performance ratio were targeted during development. The 5-cylinder engine is especially well suited for models like the Tomahawk Design Wilga with 3.70m wingspan - but can also be used in larger and heavier models.
Revised V4 version ( 2021)
External electronic ignition from R-XCEL Approx. 250g lighter than comparable engines in its class
Identical dimensions/mounting dimensions as comparable engines in its class, therefore 1:1 interchangeable.
More stroke than comparable engines in its class. Thus better intake, gets along without additional fuel pump, reliable running.
Increased torque due to longer stroke
Simple and therefore robust construction of the engine
Long maintenance intervals
NOTE: Under certain installation situations it may be necessary or advantageous to use a fuel pump (see accessories).
The electronic processor controlled ignition of the BLACK STAR 5-250 works with a 2S Lipo on 7,4V.
Features:
A high quality of workmanship, durability and a good price / performance ratio were targeted during development. The 5-cylinder engine is especially well suited for models like the Tomahawk Design Wilga with 3.70m wingspan - but can also be used in larger and heavier models.
Revised V4 version ( 2021)
External electronic ignition from R-XCEL Approx. 250g lighter than comparable engines in its class
Identical dimensions/mounting dimensions as comparable engines in its class, therefore 1:1 interchangeable.
More stroke than comparable engines in its class. Thus better intake, gets along without additional fuel pump, reliable running.
Increased torque due to longer stroke
Simple and therefore robust construction of the engine
Long maintenance intervals
NOTE: Under certain installation situations it may be necessary or advantageous to use a fuel pump (see accessories).
The electronic processor controlled ignition of the BLACK STAR 5-250 works with a 2S Lipo on 7,4V.
Features:
- Cylinders: 5
- Running gear: ABC
- Carburetor: WT 621
- Displacement: 250 cc
- Bore: 39,50 mm
- Stroke: 41 mm
- Power: 14,7 HP / HP
- Speed (rpm): 1000-5500
- Length: 211 mm, bulkhead to prop. hub
- Width: 286 mm
- Height: 286 mm
- Weight: 5,7 kg (incl. ignition and propeller screws)
- Propeller recommendation: 32 x 12 , 32 x 18 two blade
- Muffler: ring muffler incl.
- Ignition: Electronic, 2S LiPo direct
- Spark plug: CM-6
- Fuel: Gasoline/Oil mixture
Technical data
ccm: | 250 |
---|---|
HP: | 14,7 |
RPM: | 1000-5500 |
Weight (g): | 5700 |
Cylinder Type: | ABC |
Incl. muffler: | yes |