THE A-1H/FIDAL CONCEPT
ARMY BIOLOGICAL LABS FREDERICK MD
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This report discusses and shows the original FIDAL units that were built to test the concept of utilizing the airstream to rotate variablepitch fans on the nose of the externally mounted tanks. The fan is connected directly to a centrifugal pump that forces the spray liquid through a check valve that requires seven to ten pounds pressure to open, thence into and through the boom and nozzles. Three of these tanks can be carried by an A-1E formerly AD-5 and an A-1H formerly AD-6 aircraft. Two tanks are carried on wing stations and the third under the fuselage. For the latter station it is necessary to lock in the bottom dive brake while carrying a FIDAL tank. Each tank can carry 285 gallons of liquid fill or, for three tanks, about 850 gallons.
- Hydraulic and Pneumatic Equipment