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Belt Drive Units

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What is a Airboat Belted Reduction Drive Unit?

In 1989 Robert R. Eakin received a U.S. Patent for his invention which is the Airboat Belted Reduction Drive Unit. This drive unit is a belted transmission that was designed for airboats which will attach an automobile engine and the propeller. The belted drive unit allows the engine to achieve its maximum sustainable rpm's while turning the propeller at its normal rpm to increase thrust and reduce the noise levels. Century Drive Units Inc. continues today to manufacture the quality products that airboat users have come to expect and trust.

Airboats can use belted reduction drive units to increase torque. By using a 2 to 1 ratio belted reduction, the auto engine will rev up to 5,200 RPM's while allowing the propeller to turn at 2,600 RPM's for more torque and greater power. With this belted reduction drive unit you will get the maximum torque transfer to turn your propeller. An engine with a belted reduction drive unit will swing a bigger propeller, a propeller with more blades, and a greater angle of attack or (more pitch).

A wider, longer propeller turning lower RPM's will produce the same if not more thrust as a small propeller at high RPM's and produce far less noise. The key to a quieter airboat is to keep your tip speed as close to or under .6 mach.

CH-2 Drive Units

CH-2 Drive Unit , 2 to 1 ratio, with 1280-80-102 HPPD Plus Belt - Add to Price $2,675.00
CH-2 Drive Unit , 1.774 to 1 ratio, with 1280-80-102 HPPD Plus Belt - Add to Price $2,675.00
CH-2 Polychain Drive Unit , 2 to 1 ratio, with 1280-80-102 Polychain Belt - Add to Price $2,800.00
CH-2 Drive Unit , 2 to 1 ratio, with 1280-8M-102 Black Hawk Belt - Add to Price $2,750.00
CH-2 Drive Unit , 1.774 to 1 ratio, with 1280-8M-102 Blackhawk Belt - Add to Price $2,750.00
CH-3 Drive Units

CH-3 Drive Unit, 1774 to 1 ratio, with 1280-80-127 HPPD Plus Belt - Add to Price $2,800.00
CH-3 Drive Unit, 2 to 1 ratio, with 1280-80-127 HPPD Plus Belt - Add to Price $2,800.00
CH-3 Drive Unit, 2.3 to 1 ratio, with 1256-80-127 HPPD Plus Belt - Add to Price $2,800.00
CH-3 Drive Unit, 1774 to 1 ratio, with 1280-8M-127 Black hawk Belt - Add to Price $2,750.00
CH-3 Drive Unit, 2 to 1 ratio, with 1280-8M-127 Blackhawk Belt - Add to Price $2,875.00
CH-3 Drive Unit, 2.3 to 1 ratio, with 1256-8M-127 Blackhawk Belt - Add to Price $2,875.00
CH-3 Drive Unit, Diesel 1.5 to 1 ratio, with 1200-8M-127 HPPD Plus Belt - Add to Price $2,950.00
CH-3 Drive Unit, Diesel 1.5 to 1 ratio, with 1200-8M-127 Blackhawk Belt - Add to Price $3,025.00
CH-3 Long Belt Drive Units

CH-3 Drive Unit, Long Belt 2 to 1 ratio, with 2800-8M-127 HPPD Plus Belt - Add to Price $6,050.00
CH-3 Drive Unit, Long Belt 2 to 1 ratio, with 2800-8M-127 Blackhawk Belt - Add to Price $6,150.00
CH-3 Drive Unit, Long Belt 2.3 to 1 ratio, with 2800-8M-127 HPPD Plus Belt - Add to Price $6,200.00
CH-3 Drive Unit, Long Belt 2.3 to 1 ratio, with 2800-8M-127 HPPD Blackhawk Belt - Add to Price $6,300.00
CH-4 Soft Drive Units

CH-4 Soft Drive Unit, 2.67 to 1 ratio, with 14GTR-1260-125 Falcon Belt - Add to Price $3,100.00
CH-4 Soft Drive Unit, 2.52 to 1 ratio, with 14GTR-1260-125 Falcon Belt - Add to Price $3,100.00
Ford Drive Units

Ford Drive Unit , 2 to 1 ratio, with 1280-8M-127 HPPD Blackhawk Belt - Add to Price $2,975.00
Ford Drive Unit , 2.3 to 1 ratio, with 1256-8M-127 Blackhawk Belt - Add to Price $2,975.00
Ford Drive Unit , 2 to 1 ratio, with 1280-80-127 HPPD Plus Belt - Add to Price $2,975.00
Ford Drive Unit , 2.3 to 1 ratio, with 1256-80-127 HPPD Plus Belt - Add to Price $2,900.00
Briggs Mini Drive Units
The Briggs Mini Drive is the latest addition to our airboat product list. This airboat unit is designed for the 35 HP Brigg and Stratton horizontal shaft engines. The unit is a plate style system using the eccentric center shaft to tighten the 50 mm wide drive belt, very similar to our other product lines. The output pulley also doubles as the propeller hub. This drive unit uses a standard metric bolt pattern and 8 mm cap screws to attach the propeller of your choice.
Briggs Mini Drive Unit , 2 to 1 ratio, with 800-8MBH-50 Blackhawk Belt - Add to Price $1,430.00
Briggs Mini Drive Unit , 1.65 to 1 ratio, with 800-8MBH-50 Blackhawk Belt - Add to Price $1,430.00

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