Accession Number : AD0749480

Title :   Prediction and Evaluation of Flying Qualities in Turbulence.

Descriptive Note : Final rept. 4 Dec 70-4 Oct 71,

Corporate Author : NORTHROP CORP HAWTHORNE CALIF AIRCRAFT DIV

Personal Author(s) : Onstott,Edward D. ; Salmon,Ernest P. ; McCormick,Ralph L.

Report Date : FEB 1972

Pagination or Media Count : 384

Abstract : A method for predicting tracking performance of Class 4 airplanes in turbulence has been validated through a moving-base simulation of 16 F-5 and A-7 configurations on the Northrop Large Amplitude Flight Simulator. The method is based on pilot model theory and predicts root mean square tracking errors for piloted tasks in turbulence. Both lateral and longitudinal dynamics are considered, and the accuracy of the method is assessed. Specification design criteria are evolved from the simulation data for bank angle and pitch angle attitude hold tasks in turbulence. Digital programs that perform the prediction calculations accept arbitrary equations of motion and are available on request from the United States Air Force; a user's guide is included in the report, along with complete tracking error, gust level, and pilot rating data from the simulation. (Author)

Descriptors :   (*AERODYNAMICS, MATHEMATICAL PREDICTION), (*JET FIGHTERS, TURBULENCE), ATTACK BOMBERS, PITCH(MOTION), TURNING FLIGHT, ROLL, GUSTS, FLIGHT CONTROL SYSTEMS, MATHEMATICAL MODELS, FLIGHT SIMULATORS

Subject Categories : Aerodynamics
      Bombers
      Attack and Fighter Aircraft
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE