Title:
【発明の名称】ヘリコプタブレード用翼型
Document Type and Number:
Japanese Patent JP2955532
Kind Code:
B2
Abstract:
Upper and lower surfaces of a helicopter blade aerofoil are defined by the following coordinates given in the table below, and the configuration of a leading edge of the aerofoil is defined by the following leading edge radius and the center of circle. With such a configuration, maximum lift coefficient Clmax and lift-drag ratio can be increased and the noise level can be reduced.
| JP6364894A |
Other References:
【文献】米国特許4314795(US,A)
Attorney, Agent or Firm:
Keiichiro Nishikyo (2 outside)