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|1. (WO2018222844) AUXILIARY POWER SYSTEM FOR ROTORCRAFT WITH FOLDING PROPELLER ARMS AND CRUMPLE ZONE LANDING GEAR|
|Inventors:||ARKUS, Alan, J.
BURNS, Stephen, S.
|Title:||AUXILIARY POWER SYSTEM FOR ROTORCRAFT WITH FOLDING PROPELLER ARMS AND CRUMPLE ZONE LANDING GEAR|
A vertical take-off and landing (VTOL) rotary aircraft or helicopter (10) has eight propellers (42) in a quad propeller arm (34) configuration where each propeller arm (34) has two counter-rotating propellers (42). Folding propeller arms (34) are designed to allow storage in a single car sized garage. Each propeller (42) may be powered by a three-phase alternating current motor (44). The main power plant for the aircraft is a gas combustion engine (64) that generates electricity. If the gas engine (64) fails, a battery backup system will safely bring the aircraft (10) down for a controlled landing. The direct current bus is redundant in that even with a gas combustion engine failure the direct current bus battery pack will safely bring down the aircraft (10). Various embodiments of this invention may also include a landing gear (22) with crumple zones designed to soften a hard landing.