A-7D Tactical Fighter

Tactical Bombing

Mission Profiles

Navigation System

Weapon System

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Gloster Meteor

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Vought A-7D

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B-1 Strategic Bomb.

YF-17 Cobra

 


A-7D NAVIGATION AND WEAPON DELIVERY SYSTEM

The A-7D navigation and weapon delivery system frees the pilot during an attack run from a compulsory straight path approach to the target (precalculated dive angle, airspeed, altitude and pipper-on-target), which considerably reduces vulnerability to enemy fire. The system permits a highly flexible attack envelope, augmenting the pilot's ability to find targets, maneuver when necessary, and reattack promptly when required.

This flexibility is made possible primarily through the projected displays-the head-up display (HUD), the forward looking radar, the projected map-and the digital computer.

The digital computer is the indispensable central element, integrating the displays, sensors, controls and pilot's commands. Its most important role is to solve ballistic prediction problems in real time, which permits a free selection of flight path and altitude during the weapons pass. During navigation, it continually derives and displays present position and destination guidance data. Using a control panel in the cockpit, the pilot can 'converse' with the computer, prestoring up to nine destinations which can be called up during flight. Also, while flying to destination the pilot may see and 'mark' nine additional locations or possible targets, entering them into the computer for subsequent return to the locations or for readout of their coordinates after landing.

The HUD, driven by the computer, provides a continuous representation of steering, velocity and extrapolated target location, A flight path marker indicates where the airplane is going. During weapons delivery, an azimuth steering line depicts the path along which the bomb impact will move in time. An aiming reticle represents the computed target location. When in range, solution cues move down the azimuth steering line and upon intersection with the aiming reticle, a computed release occurs automatically.

The computer also drives the projected map display which provides a continuous display of aircraft geographical position. A range indicator shows distance from present position to the selected destination. By correlating outstanding geographic features on the map with the adjacent radarscope, the pilot can easily interpret ground mapping radar returns, and can instantly check his position even under instrument conditions or at night.


All information on this page is from a Vought Corporation brochure of 1974. aeroengineer.net only provided the web design for this page.