Airfoil for a helicopter rotor blade

Details Airfoil for a helicopter rotor blade Airfoil for a helicopter rotor blade

2006-02-16

2010-12-21

Mansen, Michael R (Department: 3644)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

C244S03500A

Reexamination Certificate

active

07854593

ABSTRACT:
An airfoil family for a helicopter rotor blade, designated SC362XX. SC362XX essentially removes the large lower surface suction peak associated with ‘drag creep’ at moderate lift coefficients while reducing the peak Mach number and shock strength at high lift/Mach number conditions. Another optional airfoil family for use at inboard regions of the helicopter rotor, which is designated SC3252XX airfoil family, is a relatively thicker airfoil section that includes a significant increase in thickness forward of the 30% x/c location to provide a relatively thick and rigid inboard section. The lift coefficient at which the drag divergence Mach number was optimized is the same in both families thereby readily providing application to a single rotor blade.

REFERENCES:
patent: 3728045 (1973-04-01), Balch
patent: 4142837 (1979-03-01), de Simone
patent: 4248572 (1981-02-01), Fradenburgh
patent: 4392781 (1983-07-01), Mouille et al.
patent: 4412664 (1983-11-01), Noonan
patent: 4416434 (1983-11-01), Thibert et al.
patent: 4427344 (1984-01-01), Perry
patent: 4776531 (1988-10-01), Noonan
patent: 4783023 (1988-11-01), Jupe
patent: RE33589 (1991-05-01), Lednicer et al.
patent: 5137427 (1992-08-01), Shenoy
patent: 5344102 (1994-09-01), Nakadate et al.
patent: 5791878 (1998-08-01), Wainauski et al.
patent: 6000911 (1999-12-01), Toulmay et al.
patent: 6116857 (2000-09-01), Splettstoesser et al.
patent: 6361279 (2002-03-01), Rodde et al.
patent: 6497385 (2002-12-01), Wachspress et al.
patent: 7252479 (2007-08-01), Bagai et al.
patent: 2007/0020104 (2007-01-01), Moffitt et al.
patent: 2007/0110582 (2007-05-01), Bagai et al.
PCT International Search Report and written opinion mailed Aug. 27, 2008.

Affiliated with

Also associated with

Rating

Airfoil for a helicopter rotor blade does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Airfoil for a helicopter rotor blade, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Airfoil for a helicopter rotor blade will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4212714