This Version is the Dual Starter.
This integrated device significantly reduces vibrations at idle speed and it increases safety during pre-flight routine (propeller at rest). The vibrations are almost imperceptible at all engine speeds, while the weight distribution and the size of the engine minimize the torque effect.
The other notable improvement has been achieved with the introduction of the new exhaust system, extremely quiet and performing at the same time. The entire engine has been designed to obtain the minimum noise emission, which is attenuated by the air box, the transmission belt, a special “Db-killer” silencer, and the choice of the best propellers.
The “soft starter system” (3S) is one of the new advantages. It is a manual start system that allows the engine to start, both in flight and on the ground, with a single pull through the use of only one hand.
Vittorazi has also developed, for use in hot climates or other specific uses of the enegine, such tandem or competition, a special cylinder head covering designed for this engine. This allows to significantly increase the cooling, reducing the operating temperature.
|Swept volume||184.7 cc|
|Bore||Ø 66 mms|
|Power||25 hp at 7.800 rpm|
|Cylinder||Single cylinder in aluminum Nicasil chromed|
|Piston||HQ diamond profile, graphite coating, 2 rings chromed|
|Intake||Silencer air-box – Walbro carburetor – Reed valve intake|
|Cooling||Extraction from propeller|
|Starter||Manual pull start – 3S (Soft Starter System)|
|Clutch||New CNC machined centrifugal clutch|
|Reduction drive||ratio 1/2.68 – 1/2.87 – PolyV belt.|
|Ignition coil||Inductive IDI|
|Temperatures max||EGT 550° – CHT 250°|
|Exhaust pipe||Hand-made with carbon “Db-Killer” silencer|
|Fuel||Unleaded gasoline – Synthetic oil 2.5 %|
|Consumption||3.8 – 4.2 liters/hour at 30kg of static thrust, propeller 125cms at 5600 RPM|
|Weight||14.2 kg pull starter version|
|Weight||14.6 Kg electric starter version|
|Weight||15.3 Kg pull & electric starter version|
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