WINFRIED MARTIN FEIFEL
Pilots at Ryan St, Seattle, WA
License number
Washington A0576192
Issued Date
Mar 2017
Expiration Date
Mar 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
7107 S Ryan St, Seattle, WA 98178
Personal information
See more information about WINFRIED MARTIN FEIFEL at radaris.comName
Address
Phone
Seattle, WA
7107 Ryan St, Seattle, WA 98178
7107 Ryan St, Seattle, WA 98178
7107 S Ryan St, Seattle, WA 98178
Professional information
Independent Defense &Amp; Space Professional
Location:
Greater Seattle Area
Industry:
Defense & Space
Airfoil
US Patent:
4641796, Feb 10, 1987
Filed:
Sep 30, 1983
Appl. No.:
6/537843
Inventors:
Winfried M. Feifel - Seattle WA
Assignee:
The Boeing Company - Seattle WA
International Classification:
B64C 314
US Classification:
244 35R
Abstract:
An airfoil member having an upper surface contoured to create lift. The lower airfoil surface has a lower forward surface portion which, in a rearward direction, curves concavely into an expanded convexly curved lower surface belly portion. This enables a primary load carrying member (e. g. a spar) to be located in the belly section and have a relatively greater depth, without unnecesary sacrifice of aerodynamic performance. In another embodiment, both the upper and lower surfaces of the airfoil are contoured with the expanded belly portion.