Search International and National Patent Collections

1. (WO2018222844) AUXILIARY POWER SYSTEM FOR ROTORCRAFT WITH FOLDING PROPELLER ARMS AND CRUMPLE ZONE LANDING GEAR

Pub. No.:    WO/2018/222844    International Application No.:    PCT/US2018/035353
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Jun 01 01:59:59 CEST 2018
IPC: B64C 27/00
B64C 27/08
B64C 27/12
B64C 29/00
B64D 33/00
B64D 41/00
Applicants: SUREFLY, INC.
Inventors: ARKUS, Alan, J.
BURNS, Stephen, S.
CONNERS, Patrick
WEI, Wei
Title: AUXILIARY POWER SYSTEM FOR ROTORCRAFT WITH FOLDING PROPELLER ARMS AND CRUMPLE ZONE LANDING GEAR
Abstract:
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.