NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
A computer module used to calculate the horizontal control surface size of a conceptual aircraft designThe creation of a computer module used to calculate the size of the horizontal control surfaces of a conceptual aircraft design is discussed. The control surface size is determined by first calculating the size needed to rotate the aircraft during takeoff, and, second, by determining if the calculated size is large enough to maintain stability of the aircraft throughout any specified mission. The tail size needed to rotate during takeoff is calculated from a summation of forces about the main landing gear of the aircraft. The stability of the aircraft is determined from a summation of forces about the center of gravity during different phases of the aircraft's flight. Included in the horizontal control surface analysis are: downwash effects on an aft tail, upwash effects on a forward canard, and effects due to flight in close proximity to the ground. Comparisons of production aircraft with numerical models show good accuracy for control surface sizing. A modified canard design verified the accuracy of the module for canard configurations. Added to this stability and control module is a subroutine that determines one of the three design variables, for a stable vectored thrust aircraft. These include forward thrust nozzle position, aft thrust nozzle angle, and forward thrust split.
Document ID
19900017199
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Sandlin, Doral R. (California Polytechnic State Univ. San Luis Obispo, CA, United States)
Swanson, Stephen Mark (California Polytechnic State Univ. San Luis Obispo, CA, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1990
Subject Category
Computer Operations And Hardware
Report/Patent Number
NAS 1.26:186872
NASA-CR-186872
Accession Number
90N26515
Funding Number(s)
CONTRACT_GRANT: NCC2-236
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available