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Aviation History
1921
1921 - 0751.PDF
NOVEMBER 17, 1921 Two views of the 160 h.p. (6-cyl. vertical) Beardmore aero engine. The cylinders are machined from a special grade of cast- iron combined with a screwed fianged-steel sleeve at the base. They are separate and are fitted with copper water- jackets. The valves are in the cylinder-heads, and are operated from a camshaft, situated alongside the crankshaft, by push rods and overhead rockers. Special laminated springs are used for the valves, and adjustable rocker points and push rods are provided. Two synchronised carburettors, of a special automatic, type having no moving parts, are fitted. They are fireproof and are hot water-jacketed. A "Special control for altitude work is also fitted. Ignition is by two independent high- tension magnetos, and two plugs per cylinder. The lubrica- tion is by pressure feed, with valveless piston pumps. A sight gauge is fitted to the oil reservoir. The normal r.p.m. are 1,200, and the oil and petrol consumption are 0.028 and 0.6 pt./h.p./hr. respectively. As regards the constructional features, these may be summarised as follows: The pistons are machined from steel forgings combining extreme lightness with great strength. The crankshaft is supported on seven white-metal bearings in steel shells. The design of the crank-case permits of the lower portion being removed for the inspection and adjust- ment of the bearings without disturbing the crankshaft. A fine adjustment for the valve timing is provided by a vernier on the camshaft gear wheel. Double-thrust ball races are fitted so that the engine is suitable for either tractor or pusher airscrew. THE BRISTOL AEROPLANE CO. Filton, Bristol. BESIDES the construction and design of air- craft, the Bristol Aeroplane Co. also produce aero engines—in which capacity they have already achieved the success that has always gone with the name of " Bristol." The Bristol " Jupiter " aero engine—-which is exhibited at the present Paris Salon—is, we believe, ther j > THE BRISTOL " JUPITER " 400 h.p. 9-CYLINDER RADIAL AIR-COOLED ENGINE : On the right, the power curves of the Bristol "Jupiter" for the Air Ministry Type Test. Curves "A" indicate readings taken at beginning of run • " B " indicate readings taken at end of run ; and "C" indicate power obtained& & after Type Test. 751 V'.." '---'
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