Invention Grant
- Patent Title: Pre-landing, rotor-spin-up apparatus and method
- Patent Title (中): 预着陆,转子旋转装置和方法
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Application No.: US13334261Application Date: 2011-12-22
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Publication No.: US08998127B2Publication Date: 2015-04-07
- Inventor: Walter Gerd Oskar Sonneborn
- Applicant: Walter Gerd Oskar Sonneborn
- Applicant Address: US UT Salt Lake City
- Assignee: Groen Brothers Aviation, Inc.
- Current Assignee: Groen Brothers Aviation, Inc.
- Current Assignee Address: US UT Salt Lake City
- Agency: Pate Baird, PLLC
- Main IPC: B64C27/02
- IPC: B64C27/02 ; B64C27/18 ; B64C27/26

Abstract:
A method and apparatus for reducing roll of rotorcraft landing in autorotation may include executing a flight with a rotorcraft. The flight may include first, second, and third portions ordered sequentially. During the first portion, the rotorcraft may be flown with the rotor exclusively in autorotation. During the second portion, the rotorcraft may be flown with the rotor powered at least partially by an engine of the rotorcraft, which may increase the rotational speed of the rotor. During the third portion, the rotorcraft may be flown with the rotor exclusively in autorotation. The flight and the third portion may terminate simultaneously with a touch down of the rotorcraft. Kinetic energy stored in the rotor during the second portion, during the third portion, bring the ground speed of the rotorcraft to substantially zero before touching down.
Public/Granted literature
- US20120168556A1 PRE-LANDING, ROTOR-SPIN-UP APPARATUS AND METHOD Public/Granted day:2012-07-05
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