Accession Number : AD0912576

Title :   An Investigation of the Potential Benefits of Direct Sideforce Control from a Mission Viewpoint.

Descriptive Note : Final rept. 15 Mar 72-31 May 73,

Corporate Author : BOEING AEROSPACE CO SEATTLE WA RESEARCH AND ENGINEERING DIV

Personal Author(s) : Carlson, E. Frank

Report Date : 31 JUL 1973

Pagination or Media Count : 209

Abstract : A Direct Sideforce Control (DSFC) system has been developed to increase agility and weapon delivery accuracy of tactical combat aircraft. This is accomplished through significant improvements in the lateral-directional maneuverability and handling qualities of the aircraft. The DSFC uses a chin mounted aerodynamic control surface, together with the rudder, to produce sideforce. Among other things this permits the pilot to execute turns more rapidly, make very precise heading changes with wings level and zero sideslip, and to trim out crosswinds without rolling or changing aircraft heading. The pilots who flew a weapon delivery task with the DSFC on a large amplitude moving base simulator felt that the high lateral accelerations (up to 1 g) generated by the DSFC should not have any adverse physiological effects on the pilot. These pilots also demonstrated that significant improvements in weapon delivery accuracy can be realized when DSFC is used, as opposed to the conventional flight control control system. An analytic pilot model was used to evaluate the advantages of DSFC for other tasks. The implications of adding DSFC to an existing aircraft were studied in terms of the flight control system hardware requirements, aircraft structural strength, aerodynamic characteristics and the effects on the propulsion system. (Author)

Descriptors :   (*FLIGHT CONTROL SYSTEMS, PERFORMANCE(ENGINEERING)), (*JET FIGHTERS, MANEUVERABILITY), ATTACK BOMBERS, JET BOMBERS, AERIAL WARFARE, DIVE BOMBING, REFUELING IN FLIGHT, CARRIER LANDINGS, TURNING FLIGHT, AERIAL RUDDERS, YAW, ROLL, ATTITUDE CONTROL SYSTEMS, SIDESLIP, EQUATIONS OF MOTION, CIRCULAR ERROR PROBABLE, STATISTICAL DATA, FLIGHT SIMULATORS, COMPUTER PROGRAMMING, PILOTS, TOLERANCES(PHYSIOLOGY), ACCELERATION TOLERANCE, PERFORMANCE(HUMAN), RESPONSE, HANDLING, WIND, GUST LOADS, ACCURACY, MISS DISTANCE.

Subject Categories : Bombers
      Attack and Fighter Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE