PC-3A1 & 2 



LENGTH: 18.5 ft 



BEAM: 3.5 ft 



HEIGHT 5.75 ft 



DRAFT 3.5 ft 



WEIGHT (DRY): 4,790 lb 



OPERATING DEPTH: 300 ft 



COLLAPSE DEPTH: 500 ft 



LAUNCH DATE: 1964, 1966 



HATCH DIAMETER: 19 in. 



LIFE SUPPORT (MAX): 20 man-hr 



TOTAL POWER: 7.5 kwh 



SPEED (KNOTS): CRUISE 2/8 hr 



MAX 4.5/5 hr 



CREW: PILOTS 1 



OBSERVERS 1 



PAYLOAD: 750 lb 



PRESSURE HULL: Mam hull, motor room and battery compartment are of 0.25-in. -thick A285 steel. Canopy is 0.25-in -thick plate, heads are of 



A285 steel. Hatch trunk is 0.5-in. S.S.ASTM A-351 casting and hatch cover is Almag 335 casting. Mechanical penetrations in hull are for propeller 



shaft, hatch opening shaft and droppable keel operating shaft. Motor room is separated from batteries and operators by a wall capable of 



withstanding full ambient pressure at operating depth. 



BALLAST/BUOYANCY: Main ballast tanks are made of 1 1 Si 1 2 gage A285 steel and located fore and aft to provide displacement of 1,250 lb. 



Trim tanks may also be employed to provide 320 lb displacement. 



PROPULSION/CONTROL: Main propulsion is from a stern-mounted, 7-hp, 36-V, 855-rpm, Allis Chalmers motor vuith infinitely variable speed 



control, Hydraulically -operated rudder and bow planes provide horizontal and vertical maneuvering. Bow or stern thrusters of fractional hp are 



available if required. 



TRIM; Two tanks, 0.25 in. thick, of A285 steel, 160-lb capacity each can be blown or pumped to and from seawater or fore and aft from one tank 



to the other. Valves and piping are stainless steel of non-corrosive 600-psi test minimum. Trim pump is a Hypro 3,1 gpm at 200 psi driven by a G.E. 



0.5 hp, 15amp, 32-V motor. 



POWER SOURCE: Six 6-V, 210-amp-hr, Excel, lead-acid batteries, type GRP 6, are located in a pressure resistant, gas tight compartment. 



Optionally, silver cadmium (72 Yardney Ys-200) or silver-zinc (100 Yardney LR-200) batteries may be used to extend cruising time to 10 and 20 hr, 



respectively 



LIFE SUPPORT: COt removal by Baralyme (4-qt supply) through which air is drawn by two 72 cfm Vane-Axial Blowers. One external 70-ft^, 



2,200 psi Ot bottle connected to reducer to flowmeter and regulator. Low pressure air is connected to the scuba regulators which can be used in an 



emergency, 



Vl EWING : Seventeen viewports through vehicle, thickness is 1 .0 in.; ID of 6.5 in., OD of 8 in. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC. magnetic compass, depth gage. 



MANIPULATORS: None. 



SAFETY FEATURES: Pressure hull can be pressurized and flooded for escape. By blowing ballast tanks or dropping solid ballast the following 



positive buoyancy can be obtained Main ballast tank 1.250 lb, trim tanks 320 lb, keel 180 lb. Emergency air is obtained through scuba regulators 



and hoses off the low pressure air supply. Ballast tanks can be blown through external connections. 



SURFACE SUPPORT: SOO. 



OWNER: US, Army and U.S. Air Force. 



BUILDER: Perry Submarine Builders, Riviera Beach, Fla, 



REMARKS; Operating. Kentron Ltd. of Hawaii operates these vehicles for the Atr Force and Army. 



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