YFU - Harbor Utility Craft
The YFU is a 115 foot by 34 foot self-propelled harbor utility craft, triple screw diesel engine driven, capable of carrying motor vehicles or artillery and disembarking such cargo over a hinged bow ramp directly onto the beach.
ADMINISTRATIVE DATA
Specifications: Detail and Special Specifications for Building Landing Ship, Utility LSU 1466 Class 21 Feb 1951
PHYSICAL CHARACTERISTICS
NOTE: Size varies between Classes.
| Length Overall, molded |
115'-1" |
| Length between perpendiculars |
105' |
| Beam, molded |
34' |
| Depth, molded to main deck (no camber, no sheer) amidship |
6' |
| Depth, molded to top of bulwark |
10'-6" |
| Draft, landing displacement (forward) |
2'-9" |
| Draft, landing displacement (aft) |
5'-3" |
| Displacement, light |
180 tons |
| Displacement, landing (estimated) |
347 tons |
| Diesel oil capacity |
11 tons |
| Fresh water capacity (total) |
35 tons |
| Lubricating oil capacity |
0.5 tons |
| Speed |
8 knots |
| Range |
1,200 Nautical miles at 6 knots |
PRINCIPAL MACHINERY and EQUIPMENT
Three vertical, six-cylinder, compression-ignition, solid injection main propulsion diesel engines, 165 brake horsepower at 1800 rpm continuous. 225 brake horsepower at 2100 rpm (6 hours emergency).
Two 20 kw, 120 volt DC, 2 wire diesel, battery start ship's service generator sets
Manual operated, mechanical type steering machinery
Electric winch to raise and lower the bow ramp
Single drum, reversible, gasoline driven type stern anchor winch
Bilge pump, self-priming centrifugal type, 150 gpm at 15 psi
Fire pump, centrifugal type, 100 gpm at 100 psi
Fresh water pump, self-priming peripheral type, 5 gpm at 40 psi
Fuel oil transfer pump, rotary type, 15 gpm at 25 psi
HULL, STRUCTURE and FITTINGS
Hull - Steel
Principal compartments:
Pilothouse
Engine Room
CPO Quarters
Crew's quarters
Galley and messroom
Special Fittings:
Davit
Towing bitts
Chocks
Cleats
Padeyes
LIVING
Berthing
Chief Petty Officers' quarters - Two berths
Crew's quarters - Twelve berths
Galley/Messroom
One mess table, 2 mess benches
One range
One electric refrigerator
One electric coffee urn
Sanitary
One shower
Two waterclosets
Two lavatories
One urinal
SAFETY
Anchor
One anchor, 1500 pounds, 150 fathoms, of 1 inch diameter, 6 x 37, galvanized high grade plow steel wire rope.
Anchor winch capable of a maximum line load of 30,000 pounds at a line speed of at least 9 feet per minute.
Life Saving
One 15-person life raft
One 12-foot plastic dinghy
Fire
Ten portable 15 pound carbon dioxide extinguishers
Firemain System
Sprinkling System
One NPU nozzle with a pick-up tube and two five gallon cans of foam liquid
Drainage - Eductor and drainage piping is sized so that with the eductor supplied with water from the firemain system 50 gpm of drainage water can be drawn.
OPERATION
Propulsion - Three propellers, 3'-2" in diameter, two right hand (starboard and centerline), one left hand (port), each driven by a diesel engine which drives the propeller shaft and propeller through a reverse reduction gear.
Steering
Manually operated, mechanical type with steering control in pilot house.
Travel of three main rudders limited to 35° port and starboard.
Control
Pilot house control for starting, stopping, reversing, and varying the speed of diesel engines.
Helm angle Indicator at steering station.
AUXILIARY MACHINERY and FLUID SYSTEM
Fresh water
Pressure tank type system, 40 gallon pressure tank
Hot water for domestic purposes provided by a commercial water heater
Diesel Oil - motor driven fuel oil pump 15 gpm at 25 psi takes suction from fuel oil storage tanks and discharges to fuel oil service talks for main propulsion engines and diesel generators.
Lube Oil -
200 gallon capacity lube oil storage tank. Filling of engine sumps with clean lube oil from storage tank by hand container
Heating - Two-pipe hot water heating system. Water is heated by an oil-fired hot water heating boiler.
Ventilation
Bracket fans provided as follows:
Crew berthing (2), messroom (1). and CPO berthing (1).
Air velocities not exceeding 3,500 feet per minute.
Compressed Air - 120-volt AC motor driven air compressor and pressure tank for supply of air to the pneumatic engine control system is provided with the propulsion engines.
ELECTRICAL
Generator - Two 20 kw, 120 volt DC, 2 wire diesel, battery start
Battery -
Three 24-volt storage batteries for starting propulsion engines and ship's service generators
One 12-volt storage battery for starting anchor winch engine
Shore Power - One shore terminal box to accommodate two sets of cable lugs.
Switchboard - Ship's service power switchboard
Bulkhead - mounted interior communication switchboard
COMMUNICATION
Interior Communication
Sound-powered telephones
Voice tubes
Electronics
Radio - Transmitter-receiver
Radar - 500 watts
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