1 (cargo-boat for river and canal use)
Build 1918
Loa:12,19, Br:
MOTOR CONCRETE CARGO BOAT AND DINGHY.
The cargo boat illustrated has been recently launched by Holland & Hannen and
Cubitts, Ltd., contractors, who are now developing a site of 11 acres for the rapid construction of all types of concrete vessels on their patent system.d it has been in constant service
since, and is in an excellent state of preservation.
The cargo boat is 40 ft.
long, having a load displacement of 28 tons on 4-ft. draught. The weight complete with engines is 8½ tons. It is designed as a river and canal cargo boat and
tug, and has already done some hard towing. There are four complete watertight
bulkheads, and has a hold capacity of 900 cubic feet.
By the patent method employed by this
firm, no wooden centreing or shuttering of any type is required. The outside keel band is bent up to form the stem band and over the bow chock and backwards to form the propeller post. This is connected to the inner keelson by clips. Hogging and sagging strains are provided for by fore and aft steel rods forming gunwales and bilge
stringers. The frames, which are spaced 16 in. centres, are formed of M.S. round rods and are faired to lines on the
slipway. Expanded metal is then worked on to this in 2-ft. strakes forming the inner skin. An outer skin is then
applied, distanced from the inner skin, and between these the concrete is
deposited. At the same time as this is done the inner and outer faces are put on and the fairing is completed and the surfaces finished with steel trowels ; the complete skin is
watertight. Hulls built on this patent method, besides being very light, are said to be highly
resilient.
The total thickness of skin employed in the boat illustrated is 1¼ in. The vessel's speed,
light, is eight miles an hour.
The firm are standardising concrete vessels of 150, 400, 750 and 1,500 tons d.w. capacity. They have also recently constructed several small boats of the dinghy
type, in which the skin is only ½ in thick. These are proving successful under
oars, sail and by outboard motor.
SHIPBUILDING AND SHIPPING RECORD. August 15, 1918.
page 159
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An advertisment from "The Motor Ship and Motor Boat" April 3 1919