Post #5000 (Whew): Know Your Land’s End Shipwrecks of 1922 – Chevron’s SS Lyman Stewart – Engine Block at Low Tide

This is all that’s left of SS Lyman Stewart – you can see its three cylinder steam engine from Land’s End at low tide.

The first cylinder is 75 inches in diameter and the second and third are 45 and 26.5:

Click to expand – this one gets real big

This is what the she looked like after her big collision 89 years ago on October 7, 1922. Pwned!

“Lyman Stewart, a steam tanker, wrecked on a rocky beach with people looking on”

Via Puget Sound Maritime Historical Society - click to expand

Take a tour yourself, why not?

All the deets:

Length over all, 426 ft. 9 in.; length between perpendiculars, 410 ft.; beam moulded, 55 ft. 3j4 in.; depth moulded to upper deck, 31 ft. 8 in.; load draft, 27 ft.; load displacement, 13,960 tons; cargo capacity, 63,964 bbls.; fuel capacity, 2,211 bbls.; gross tonnage, about 5,900; revolutions per minute, 65; designed I. H. P., 2,600; designed speed 10J/2 knots.

The ship is a single screw steamer with the machinery located aft.

The hold is subdivided into 16 tanks for carrying oil in bulk, the starboard and port compartments being separated by an oil tight center line bulkhead up to the top of the expansion trunk.

The ‘tween decks, in the wings outside the expansion trunk, is arranged for carrying refined oil.”

Ever more deets after the jump.

“The fore hold is fitted for carrying ordinary freight. Fresh water is carried in double bottom under the engines and boilers. A double bottom is fitted forward for carrying either fresh water or ballast. The fore peak and after peak are also constructed for carrying fresh water. The vessel has a straight stem and elliptical stern, with two continuous decks and raised forecastle. There is an open bridge amidships and a full poop aft. She is rigged with three steel pole masts with three cargo booms on foremast, two on mainmast and one on mizzenmast.

Accommodations in the poop are fitted up for the engineers, stewards, firemen, seamen, etc. Upon the bridge deck amidships, enclosed in a steel house, are the accommodations for the captain, deck officers and steward, the pantry, dining room, staterooms, bathroom and toilets. Above this house and on a level with the flying bridge a teak wheelhouse and charthouse are built. The vessel is provided with a Brown steam tiller, steam windlass and capstan, two powerful warping winches and two warping capstans.

Hull Construction.

The vessel is constructed on the Isherwood system with transverse framing abaft the engine room. The keel is of the flat plate type, furnaced out at each end to properly meet the heels of the stem and the stern frame. The stem is of wrought steel and the stern frame, of cast steel, is built in two sections with well proportioned scarphs.

The rudder is of the single plate type, the frame being of forged steel with the arms keyed to stock. The stock is in two pieces with a coupling under the counter.

All erections on poop and bridge, with exception of the wheel- and chart-house, are of steel. All bulkheads in living quarters are stopped at the underside of the beams, the space above being fitted with expanded metal panels for ventilation.

Propelling Machinery.

The propelling machinery consists of one three cylinder triple expansion engine having cylinders 26.5 in., 45 in. and 75 in. diameter by 48 in. stroke. There is an independent condenser with 3,755 square feet of cooling surface She has one right hand, four bladed, built up propeller with bronze blades and cast iron hub. It is 18 ft. 9 in. diameter and 18 ft. 9 in. pith with 99.4 sq. ft. helical area.

The main engines are fitted with Stephenson link motion for valve gear, the H.P. and LP. valves being of the piston type and the L.P. of the balanced slide type.

Piston rods and valve stems are fitted with Tucker Improved United States double block metallic packing. The shafting is ten per cent, heavier than Lloyd’s requirements, with male and female couplings and narallel coupling bolts. The thrust is of the horseshoe type with the horseshoes cored for water circulation.

Steam is supplied to this engine by four single ended Scotch marine boilers, each 14 ft. dia. by 12 ft. long, built for a steam pressure of 200 lbs. per square inch. Each boiler is fitted with three Morison suspension furnaces about 42 in. diameter, with a separate combustion chamber to each furnace. Tubes are 3- in. external diameter. Each boiler is fitted with a Foster superheater having heat absorbing surface of 740 sq. ft.

The boilers have a total heating surface of 9,360 square feet and are fitted to burn fuel oil. The oil fuel system is the Dahl type, which is almost universally used on the Pacific Coast and has given extremely satisfactory results.

The engineers’ workshop is fitted up with one 22 in. drill press, one 20 in. by 14 ft. lathe, one double emery grinder, bench vise and all necessary tools. The machinery i» driven by a 7^ H. P. motor.”

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