FM 1-506 Fundamentals of Aircraft Power Plants ... - Survival Books

WWW.SURVIVALEBOOKS.COMFM 1-506The dry-sump systems use an oil tank which containsmost of the oil supply. However, a small sump usually isincluded on the engine to hold a supply of oil for anemergency system. The dry-sump system usually contains–Oil pump.Scavenge and pressure inlet strainers.Scavenge return connection.Pressure outlet ports.Oil falter.Mounting bosses for the oil pressure transmitter.Temperature bulb connections.A typical oil tank is shown in Figure 5-2. It isdesigned to furnish a constant supply of oil to the engine.This is done by a swivel outlet assembly mounted insidethe tank a horizontal baffle mounted in the center of thetank, two flapper check valves mounted on the baffle, anda positive-vent system.The swivel outlet fitting is controlled by a weightedend, which is free to swing below the baffle. The flappervalves in the baffle are normally open. They close onlywhen the oil in the bottom of the tank rushes to the topof the tank during deceleration. This traps the oil in thebottom of the tank where it is picked up by the swivel5-2