US 11,673,657 B2
Multi-rotor rotorcraft
Michael J. Duffy, Lansdale, PA (US); Joshua B. Jarvis, St. Charles, MO (US); Roger W. Lacy, West Chester, PA (US); David M. Neely, Kirkwood, MO (US); and Eric J. Schulze, Hockessin, DE (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on May 31, 2019, as Appl. No. 16/428,668.
Claims priority of provisional application 62/843,231, filed on May 3, 2019.
Prior Publication US 2020/0346746 A1, Nov. 5, 2020
Int. Cl. B64C 27/20 (2023.01); B64C 27/08 (2023.01); B64C 29/00 (2006.01); B64U 10/10 (2023.01); B64U 30/20 (2023.01); B64U 50/14 (2023.01)
CPC B64C 27/20 (2013.01) [B64C 27/08 (2013.01); B64C 29/0025 (2013.01); B64U 10/10 (2023.01); B64U 30/20 (2023.01); B64U 50/14 (2023.01)] 21 Claims
OG exemplary drawing
 
1. A multi-rotor rotorcraft, comprising:
a fuselage;
at least four rotor assemblies operatively supported by and spaced-around the fuselage, wherein each of the at least four rotor assemblies defines a spin volume and a spin diameter; and
at least one rotor guard that is fixed relative to the fuselage, that borders the spin volume of at least one of the at least four rotor assemblies, and that is configured to provide a visual indication of the spin volume of the at least one of the at least four rotor assemblies, wherein the at least one rotor guard comprises at least one combined rotor guard that at least partially borders the spin volume of more than one of the at least four rotor assemblies;
wherein the fuselage comprises an internal compartment and an access door having a door-width that provides selective access to the internal compartment;
wherein the at least four rotor assemblies comprise a first pair of rotor assemblies positioned on opposing sides of the access door; and
wherein a spacing between the spin volumes of the first pair of rotor assemblies is at least 100% of the door-width.