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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