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YD - Floating Crane

YD is a non-self-propelled 100 ton capacity floating crane of the revolving, truss-boom type with a machinery house mounted on a welded steel barge. The hull has an engine room for self-contained diesel-electric power plants and a crew's quarters. It is of a design and construction that will permit towing overseas. Its function is to provide crane support in areas where land-based cranes are not available.

ADMINISTRATIVE DATA

Specifications - Naval Facilities Engineering Command Specification No. 79026/67

PRINCIPAL CHARACTERISTICS

NOTE: Size and capacity varies between Classes.

100 TON CAPACITY CRANE:

Length, molded

140'

Breadth, molded

70'

Depth, amidships, molded

12'-6"

Camber, amidships

8 3/4"

Sheer, aft

1'

Sheer, forward

3'

Bilge radius, amidships

1'

Bilge radius, rakes

2'-6"

Rake, radius

I5'

Displacement, full load, without load on hook

1,630 long tons

CRANE

Boom length

123'-6"

Capacity, main hoist

200,000 pounds

Capacity, auxiliary hoist

33,600 pounds

Speed, main hoist

14 ft/min

Speed, auxiliary hoist

79 ft/min

Speed rotation

1 rev/ 3 min

PRINCIPAL MACHINERY and EQUIPMENT

Two main diesel engines, vertical multicylinder single acting, 4 cycle, 720 rpm, 215 net brake horsepower.

Two main generators, 125 kilowatts, 240 volts, 2 wire, DC, 720 rpm.

One bilge pump, centrifugal, self-priming, single stage cast iron pump with a capacity of 75 gpm at a head of 40 feet.

One crane, 123 foot-6 inch boom length, 100 ton capacity.

HULL, STRUCTURE and FITTINGS

Hull - All welded steel construction

PRINCIPAL COMPARTMENTS

Engine room

Crew's quarters

Machinery house

Crane operator's cab

Galley and mess room

SPECIAL FITTINGS

Bitts - four 10-inch cast steel standard double bitts

Cleats - six 48-inch cast steel horn type standard cleats

Chocks - eight towing lugs approximately 75 by 20 inches constructed of 3-inch-thick steel

LIVING

Berthing - four berths located in crew's quarters

Galley/Mess - range, refrigerator, one mess table

Sanitary - toilet room, two lavatories, two water closets, one shower

SAFETY

Fire - Built-in carbon dioxide system consisting of ten 50-pound cylinders of protection of the engine room.

Two 50-foot sections of single jacketed, cotton rubber lined, 14 inch fire hose adaptable to portable bilge and fire pump, 75 gpm at 50 psi.

Four portable 15-pound CO2 fire extinguishers provided as follows: machinery house (2), crew's quarters (1), and engine room (1).

Life Saving - Four 30-inch-diameter life rings

Six life preservers

Anchor - Two anchors. 4200 pounds: two anchors chairs, 15-fathom shots, 60 fathoms long anchor windlass capable of hoisting two anchors simultaneous at a maximum speed of 10 fpm.

Drainage - One centrifugal, self-priming, single stage, cast iron bilge pump with bronze fittings and a capacity of 75 gpm at a head of 40 feet is installed in the engine room.

OPERATION

Propulsion - Non-self-propelled

Steering - None

Crane equipment - The main and auxiliary hoists are operated from a single 100 horsepower, 230 volt DC,420 rpm motor through a speed reduction unit. The boom hoist is operated from a single 200 horsepower, 320-volt DC, 400 rpm motor through a speed reduction unit. The rotating mechanism is driven by a 65 horsepower, 30-volt DC, 500 rpm motor.

OPERATION AND CONTROL

Battery - 32 volt battery and battery charging panels

Switchboard - Two switchboards with circuit breakers

Special lighting - Two 12-inch search lights

Lights - (towing. man overboard, breakdown, aircraft warning)

NAVIGATION - One magnetic compass located on bridge




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Page last modified: 07-07-2011 13:01:23 ZULU