Our Featherweight Flywheel is the lightest flywheel assembly available for Lycoming 320, 360, 540, and 720 engines. Due to our vast experience with Magnesium, a material that is well-known for its exceptional strength to weight ratio, coupled with our use of the latest CAD/FEA modeling software, we are able to manufacture a flywheel that is strong enough to handle severe conditions, while being extremely lightweight.

Our Featherweight Flywheel weighs just 2 pounds, 15 ounces (1.3kg) complete with 149 tooth hardened-steel ring gear.

In addition to reducing static weight at the most beneficial area to the aircraft, a lightweight flywheel increases the rate of engine acceleration, most importantly when recovering from aerobatic maneuvers. The weight reduction of our flywheel also helps to offset the weight gain associated with upgrading to a constant speed propeller.

Our Featherweight Flywheel is designed to be used with the popular rear-mounted lightweight alternators that are available from B&C and PlanePower. At a slight weight penalty, we also offer flywheel options for those who wish to use a standard front-mounted alternator.

For easy ignition timing setup and adjustments, the flywheel has timing marks that are clearly machined into the outer ring at 0°TDC, 20°BTDC, 25°BTDC, 30°BTDC, and 40°BTDC.

Flywheel Pricing: 

149 tooth ring gear is standard, 122 tooth ring gear also available (adds $55.USD to cost)