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Aviation History
1909
1909 - 0203.PDF
APRIL IO, 1909. LEADING AERO-MOTORS AT OLYMPIA. (.Concluded from page 197.)Gobron-Brillie (GOBRON-BRILLIE AGENCY) Modified radial pnoW ;„ Y <• u • • r. culating-pump are mounted on opposite ends of a trans- cvlinders arr^ed in S? T u™ 1 T"g 61ght verse-shaft, which is driven by exposed bevel-gearing cylinders arranged in pairs. In each cylinder are two through a crank-shaft. In the case of the A type engines. " Flight" Copyright Photo. Gobron X Engine.—This has 8 cyls.,each containing two pistons working in opposite directions. pistons arranged on the standard Gobron-Brillie principle. The two pistons move in opposite directions, and whilst one is coupled up to the crank-shaft in the usual way, the other is coupled up to a beam which carries a pair of external connecting-rods. These latter and the beam are enclosed in an aluminium casing which is bolted to the crank-chamber. The valves are, of course, set in the centre of the cylinders so as to feed the mixture into the combustion space between the two pistons. A special feature of the valve mechanism on the Gobron aero- motor is the operation of the exhaust-valves from a single cam-plate which works in conjunction with a set of four rock-shafts. Each rock-shaft controls a pair of exhaust- valves, and the inlet-valves are atmospheric. The cylinders are water-jacketed, the jackets being formed of brass. Forced lubrication is provided and the engine is fitted with two magnetos and two carburettors. Dutheil-Chalmcrs (CAPT. WINDHAM). Horizontal engine with opposed cylinders made in three models with 2, 4, and 6-cylinders, and in two types of which type A has a single crank-shaft between the cylinders, whilst type B has two crankshafts with the cylinders between them. In the latter case the cylinders are combined in pairs, so that each contains two pistons moving in opposite directions simulta- neously. The cylinders are cast separately, and have copper water-jackets fastened at the bottom by a marine type stuffing-box, and at the top by yokes, which are held in place by long bolts passed through the crank- chamber from one cylinder-head to another. Atmospheric- inlet valves are employed, and the exhaust-valves are placed in the cylinder-heads, where they are operated by an overhead rock-shaft from a central cam-shaft, which is driven by exposed gearing. The magneto and the cir- " Flight " Copyright J'hoto. DUTHEIL-CHALMERS HORIZONTAL ENGINE.—The cylinders areopposed, but the pistons of opposite cylinders are connected to separate cranks set 180 degrees apart. The water-jackets are made of copper, andthe inlet-valves are of the atmospheric type. the opposed cylinders are not exactly in line with one another, and their pistons are coupled up to cranks which are 18o° apart. There is a bearing for each pair of cranks, and adjacent pairs are, of course, placed 120° apart. R.E.P. (BESSLER, WAECHTER, AND CO.). Semi-radial engine, that is to say, the cylinders project from the upper part of the crank-chamber only, although' each is still radial to the axis of the crank-shaft. There are three models—all of which have the same cylinder dimensions—having 5, 7, and ro cylinders respectively- In the 5 and 7 cylinder engines the cylinders are arranged in two planes, the cylinders being staggered as if they had "Flight" Copyright Photo.R.E.P. AERO-MOTOR.—General view, showing how the five cylinders are all arranged above the crank-shaft (semi'radial). originally been radial below the crank-shaft and had been folded up into their present "semi-radial" position. The 10-cylinder engine is virtually two 5-cylinder engines 205
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