- Nickel-Silicon plated cylinder surfaces
- Fully encapsulated valve train
- CNC milled crankcase, cylinders and cylinder heads
- The VM R5-250 comes with a light weight ring muffler made from Stainless steel
- The VM R5-250 comes with a radio controlled electric fuel pump
- Radio controlled ignition switch integrated in the ignition module
- Valach microprocessor controlled ignition with auto advance and retard
- Spontaneous throttle response and smooth midrange transition
- Honda valves and valve seats
- Walbro HDA 48 carburetor
- VM-engines are being produced with state of the art machines and methods
- Rapid spares delivery and repair service from Germany by Toni Clark practical scale GmbH.
Valach Engines
VM R5-250
The Valach VM R5-250 is a four stroke OHV engine with two valves per cylinder, running on petrol/oil mixture. Valves and their seats are manufactured by Honda, ensuring a very high quality. The fully encapsulated valve train reduces sound as well as keeping dust and dirt away from the rocker arms.
A special safety feature is built into the microprocessor controlled ignition. It senses a rapid RPM rise of more than 3000 RPM in less than one second, should this happen during starting the engine. It will shut off the ignition immediately and give out a warning signal, you then can restart the engine – at a lower more save throttle setting.
The Valach VM R5-250 radial is designed and built soundly in the Valach tradition. Crankcase, cylinders and cylinder heads are CNC milled using a high grade aluminium alloy.
Image: Gerhard Reinsch of Toni Clark practical scale is flight testing and perfecting the Valach VM R5-250 Prototype and pre production engine. It was done during 2017/18 with the above Grumman F3F-2.
Specification | |
Cylinder | 5 |
Displacement | 250 ccm |
Bore | 42 mm |
Stroke | 32 mm |
Diameter | 301 mm |
Length from engine mount to prop hub | 194 mm |
Weight engine | 5.597 g |
Weight engine complete with ringmuffler, engine mount, electric fuel pump and ignition | 6.050 g |
Ignition voltage range | 6 - 9 Volt |
Idle RPM | 6.000 1/min |
Fiala 2-blade Prop | 32x20" 34x16" 34x18" 36x14" |
Fiala 3-blade Prop | 30x18" 32x14" 32x16" |
All prices in EURO including 19% German VAT. We reserve the right to alter prices and specifications without prior notice. | |
Airplane kits, engines & accessories
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In our webshop you will find all of our airplane kits, engines, accessories and more. If you have any questions, please don’t hesitate to contact us!
In our webshop you will find all of our airplane kits, engines, accessories and more. If you have any questions, please don’t hesitate to contact us!