New Polini THOR 303

New Polini THOR 303

Polini Motori presents the new Thor 303, a concentration of power and technology.

An innovative engine with important novelties that result into reliability, power. Reduced weights, reduced aerodynamic section and moderated depth.

This is the engine of the Thor family with the biggest displacement with cylinder, crankshaft, carburetor, air box, CDI and exhaust system completely redesigned to grant better performance and flight safety.
With 38hp at 8000 rpm, Thor 303 offers 120 kg of static thrust with a propeller of 160cm*
The consumption is only of 3 liters per hour at 4500 rpm, that corresponds to 30 kg of static thrust, medium range at level flight.

Thor 303 is available in 3 versions:
Thor 303 with Manual “Flash starter”
Thor 303 with electric starter+ Manual “Flash starter”
Thor 303 Dual Spark

Polini Engine 2 stroke monocylinder
Cooling Liquid cooled
Bore for stroke 76 x 62
Displacement 281 cm3
Power 38 HP at 8000 rpm
*Max trust 120 Kg with Ø 160 cm propeller
R.P.M. max 8.400
Cylinder Aluminum with Gilnisil coating
Compression ratio 11,2:1
Piston Two trapezoidal chromium plated rings
Intake Reed valve in the crankcase
Carburetor Dell’Orto VHST 28mm
Air filter Air box
Ignition Electronic CDI with adj. advance
Battery charger prearrangement Output power 80 W at 5500 RPM
Spark plug hood 5k Ω resistance
**Fuel type E5 petrol or LL AV GAS-al with 2,5% synthetic oil 100%
*Consumption 3 Lh 30 Kg a of static trust
Gear reduction unit Helicoidal teeth in oil bath with 2,8 or 3,2 reduction ratio
Starter Flash Starter – (Electric starter -optional)
Clutch Centrifugal in oil bath
Muffler Expansion with aluminum silencer
Engine weight Starting from Kg 20,5 (manual starter model +radiator)
Propeller rotation Clockwise


More information visit this link: push here