B-24 DOUBLE STEP HULL RACING BOAT

B-24 Double Step Hull Racing Boat

This boat was developed by Ocke Mannerfelt and is the result of protracted aerodynamic research aimed at achieving best possible performance. It has been awarded two design prizes and is patented. The newly designed double-step hull bottom features patented speed rails: specially designed stringers which distribute the air-enriched water under the bottom of the boat and thereby reduce the wetted area. The boat planes over the water on a layer of "air lubrication" evenly distributed over the hull surface.

The boat is extremely slim in an effort to minimize air resistance. The lateral wings on the hull produce upthrust due to their profile and also due to ground effect. The model is based on the original drawings and is molded using all-GRP technology, with the exception of the driver's cabin. The boat can be fitted with a scale power system utilizing a Z-drive 600 and SPEED 700 TURBO motor, but can also be equipped with two electric motors and contra-rotating semi-cavitating surface-piercing propellers for higher speed, according to the builder's individual preferences.

For even higher speeds it is also possible to fit ULTRA 920-6M or ULTRA BRUSHLESS 220/30-3 motors, although not with the Z-drive. This option is for experienced modelers only, and no details are provided. Suitable for the Mono 1 and Mono 2 racing boat classes when fitted with the appropriate power system.