Gyroplane Landing Gear (2015)

This project was the design of the spring steel landing gear for the tandem tractor gyroplane that I was concurrently developing at the time.  The main landing gear were modified Cessna 140 landing gear legs.

Michael Fuchs Gyro Landing Gear
Michael Fuchs Gyro Landing Gear

I used an iterative Finite Element Analysis (FEA) method to tailor the leg spring stiffness to produce the desired deflection at max landing weight and expected landing descent rates.  I milled the width of the Cessna 140 gear legs down to the specific analyzed dimensions.  Also, I canted the legs out for a wider stance while still producing the same root bending moment of the heavier C140. This wider stance required special axle mounting blocks to set the proper axles angle.  I analytically designed the axle block angle to produce level axles with the aircraft sitting static at a nominal weight.  The gear was sized per configuration applicable FAR23 load cases. The rolling stock was FAA/TSO Parker Hannifin 500-5.00 with single puck differential hydraulic brakes.

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