MODEL F-4J DIRECT LIFT CONTROL
Abstract
An aerodynamic analysis and system design study for incorporation of Direct Lift Control (DLC) in the McDonnell F-4J airplane has been accomplished. Redesign of lift or control surfaces was not considered. Design of both a prototype and production configuration was conducted, with the prototype configuration having the capability of DLC system variation for optimization through flight testing. Design was carried out to the schematic drawing stage and word descriptions of all system changes required are included. The results of an analog computer study were utilized: to define the flap nominal position, deflection rate, and total travel required to obtain the specified incremental normal load factors (+ or - .10 or + .13/-.07); to determine DLC-Stabilator and DLC-Approach Power Compensation System (APCS) Interconnect requirements; and to investigate wave-off capabilities. It is shown that DLC incorporation in the F-4 airplane is feasible. Production incorporation may necessitate consideration of the required strength of the landing gear and backup structure, as well as wind- over-deck requirements for carrier operations, if flight evaluation of DLC shows that increased landing attitude or increased approach speed is required.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0822047
Entities
People
- R. E. Vaughn
- R. H. Mathews
- W. B. Weber