Title:
FLAPPING FLIGHT DEVICE HAVING VARIABLE WINGSPAN
Document Type and Number:
WIPO Patent Application WO/2018/066918
Kind Code:
A2
Abstract:
A flapping flight device according to the present invention is a flight device having at least one wing on each of the left and right sides of a fuselage so as to make a relative movement with regard to the fuselage by means of a driving source, thereby generating lift. At least one crank mechanism is provided on each of the left and right sides of the fuselage so as to receive driving force from the driving source. Each crank mechanism comprises a crankshaft extending in the forward/backward direction of the fuselage, a crankpin that makes a revolving movement around the crankshaft, and a crankarm that connects the crankshaft and the crankpin. Each crankpin revolves in such a rotational direction that, when descending, the same passes through the farthest point from the fuselage. The fuselage has at least one flapping movement shaft provided to serve as the center axis of the flapping. Each crank mechanism has a wing/crank connecting portion provided to bond the crankpin and the wing. The wing end of each wing is in a free-end state, the middle part thereof is coupled to the wing/crank connecting portion, and the inner part thereof is bonded to the flapping movement shaft to be able to swivel or slide. When the wing makes descent flapping following a revolving movement of the crankpin that receives driving force from the driving source, the orthographically projected wingspan gradually lengthens and, after passing through the maximum point, gradually shortens. When the wing makes ascent flapping, the orthographically projected wingspan gradually shortens and, after passing through the minimum point, gradually lengthens.
Inventors:
LEE SANG CHEOL (KR)
Application Number:
PCT/KR2017/010927
Publication Date:
April 12, 2018
Filing Date:
September 29, 2017
Export Citation:
Assignee:
LEE SANG CHEOL (KR)
International Classes:
B64C33/02; A63H27/00; B64C13/02; F15B15/02
Attorney, Agent or Firm:
SHIN, Yong Hyun et al. (KR)
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