ABN 16 942 302 441

Supplier of Radio Control Model Aircraft and Helicopters

Profi Q500

• AAC piston and sleeve.  Profi has the best piston material in the world and that is what makes the big difference in all Profi engines.

• Absolutely Perfect piston to cylinder fit. Very tight while cold, perfect at running temperature.

• Integral rear bearing with the crankshaft forming the inner race of the rear bearing. Borrowed from Profi FAI competition speed engines where this is a standard feature but never seen on an American built racing engine. The result is a truly free bottom end. A side benefit is the very high quality steel used to make the crankshaft.

• Stiffer Crankshaft resulting from the larger diameter at the junction with the crank disk and forming the inner race of the rear bearing. The dead free crankshaft rotation adds a small improvement in rpm compared to any regular ball bearing engine.

• Balanced crankshaft, no external balance. This engine runs so smooth you will not believe it. 18.5mm crankshaft.

• Crankshaft has 12mm gas passage with an exclusive asymmetrical configuration resulting in improved torque band at operating rpm.

• Flow smoothed and angled crankshaft inlet port, for improved intake performance.

• Domed piston. Slight RPM improvements result from the domed piston again adding to overall performance.

• Front Bearing Retainer.The front bearing is held in place by a screw-in bearing retainer, one more item borrowed from FAI competition engines. And again the stability of the crankshaft results in a small rpm improvement.

Test flying is indicating that the Profi engine uses just about the same propeller combination as the current top engines. The test engines have shown great flexibility in propeller choice.

The New Profi Q500

Available for $565

Now available

This balancer has been designed with the Pylon racer in mind. It is made of 10 x 50mm aluminium and is quite rigid and sturdy. The magnets are made from Neodymium Iron Boron (or NdFeb) and are the most advanced magnet with superior performance. The spindle is designed speciffically to balance the Molded Hub Carbon Fibre pylon props supplied by Big Bruce Racing

Note: The prop spindle has now been updated to balance the normal sports and carbon racing props, as well as the Moulded Hub props.

The complete unit is available for

$100.00

Do your engine a favour, and give it a balanced Propellor for a great start.

If you are or want to run the Molded Hub Carbon Fibre pylon props on your Nelson then this is what you will need. The backplate is designed to relpace the original 1 3/4" balanced spinner backplate on the Nelson and has the correct mounting on the front to suit the Molded Hub Carbon Fibre pylon props. These backplates are the correct size to suit the Polecat, GR7, Sump 'N Else and the Loki as supplied by Big Bruce Racing

$45.00

And of course the Spinner Nut completes the front end set up. This is using the same thread as the Nelson Shaft. (Other shaft threads available on request.)

$25.00