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Valach VM R7-800
Product Details
Description
Valach VM R7-800 800cc 7 cilinder radial 4 stroke engine
At Aerobertics we have been a direct Fiala / Valach dealer
for years and we are in direct contact with the factory. We also use them in
our demo models and as a result we have the necessary knowledge and experience
about these engines so that we can offer you the best support.
The Valach Motors VM R7-800 just looks like a real radial
engine, only smaller, above all it sounds like a real aero radial engine. Not
improperly smooth, like smaller radials. The absolute scale flight with the
marvellous sound from that large capacity radial engine can, if at all
possible, only be bettered with a full-size machine.
The big capacity per cylinder, the valve timing and the
supplied ring shaped silencer are responsible for the realistic sound on idle
and on part load. Like all Valach engines, the response to the throttle being
opened is so smooth without the slightest attempt to surge.
Valves and
their seats are manufactured by Honda, ensuring a very high quality. Due to the
inclined valves, the combustion chamber is shaped more like a hemisphere. This
improves the combustion and the engine has a higher performance. In addition
the fuel consumption is lower than otherwise.
The
crankcase, cylinders and cylinder heads are cast like with full-size aero
engines, which enables a light weight and the VM R7-800 with the casting
surface finish has a very realistic appearance. Due to the steel
cylinder liners this engine will have a long life.
We have fitted an electric petrol pump, the VM R7-800 is
easy to start and in every flying attitude has a reliable petrol feed. After
sucking in with choke closed the VM R7-800 starts after the first or second
flip.
The processor controlled ignition allows easy starting and a
exceptionally smooth running in all throttle settings. The ignition can be
operated with a two cell Lipo battery
We had tried many oils, but recommend Valvoline SynPower 2T
oil.
We recommend Aral Ultimate 102, as the smell is not so
penetrating and it can be stored without
deteriorating. It does not contain any ethanol.
For a good throttle response in all RPM ranges, we recommend
the use of an intake RAM tube.
Features
- Cylinder: 7
- Displacement: 800 cc
- Output: ca. 45 hp
- Bore: 52 mm
- Stroke: 52 mm
- Diameter: 550 mm
- Length from engine mount to prop hub: 300 mm
- Weight: 28.2 kg
- Ignition
voltage range: 6 - 9 V
- Idle
RPM: 500
- Max
RPM: 3800
- Propeller size: Fiala Prop 2-Blade: 48x22" to 59x20", Fiala Prop 3-Blade: 35x18" to 45x20"
Properties
Manufacturer | Valach |
---|---|
Article reference | VM800R7 |
Cylinder | +120cc |