Title:
飛行機の造波抵抗低減方法
Document Type and Number:
Japanese Patent JP3980775
Kind Code:
B2
Abstract:
It is an object of the present invention to reduce the wave resistance by disposing a fluid element such as an engine nacelle in a predetermined position on the upper surface of the main wing, and positively superposing the air flow generated by the fluid element onto the air flow on the upper surface of the main wing, thereby reducing the peak of the negative pressure on the upper surface of the main wing to retard the generation of a shock wave. If the engine nacelle is disposed on the upper surface of the main wing, and the longitudinal position of the front end of the engine nacelle is established in a range of 63% to 100% from the front end of a wing chord of the main wing (see b and i in FIG. 9), a shock wave is generated on the upper surface of the main wing in a range of transonic speed to inhibit an increase in wave resistance, whereby the cruising speed can be increased, while avoiding an increase in amount of fuel consumed. If the front end of the engine nacelle is in front of a position corresponding to 63% of the wing chord (see e and f in FIG. 9), a shock wave inhibiting effect is not exhibited, and the wave resistance is increased.
Inventors:
Michimasa Fujino
Yuichi Kawamura
Yuichi Kawamura
Application Number:
JP30699198A
Publication Date:
September 26, 2007
Filing Date:
October 28, 1998
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B64C23/00; B64D27/18; B64D27/02; B64D29/02
Domestic Patent References:
| JP55011560B1 | ||||
| JP58008498A | ||||
| JP100795C2 |
Foreign References:
| US4311289 | ||||
| US4171786 | ||||
| US4629147 | ||||
| US3952971 | ||||
| US5779191 |
Attorney, Agent or Firm:
Ken Ochiai
Kazuaki Niki
Kazuaki Niki