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Aviation History
1909
1909 - 0708.PDF
NOVEMBER 6, 1909. against 168 kilogs., which is the weight of another Panhard model rated at the same power. The principal difference lies in the use of very light cylinder-heads and combined concentric valves situated vertically in them. Both valves are mechanically operated by PARIS FLIGHT SHOW.—The 45*h.p. 4-cyl. water- cooled Renault. PARIS FLIGHT SHOW.—View of the special 35-h.p. Panhard flight engine, which has combined concentric-valves in the cylinder-heads. Dimensions.—110 mm. by 160 mm. ; weight, 190 kilogs. ; h.p., 45 at 1, ico r.p.m. ; price, 11,000 francs. Green 5O»h.p.—British-built 4-cyl. vertical water-cooled engine. The steel cylinders are fitted with copper water-jackets, which have a sliding expansion-joint at the bottom, and are held down by the means of a double-acting tappet-rod ; the detail of this mechanism is uncommon, for the inlet-valve is controlled by a small rock-lever pivoted on the tubular stem of the exhaust-valve. The cylinders are cut from solid steel as also are the pistons, bnt the rings are cast-iron ; lubricant is forced to the crank-shaft by a PARIS FLIGHT SHOW.—Sectional side and end elevations of the British-built Green engine, showing the overhead valves and method of driving the overhead cam-shaft. valve-cages at the top. All the valves are mechanically operated by an overhead cam-shaft. Further particulars of this engine, which is not only one of the most interesting, but also one of the best-made motors at the Salon, have already appeared in FLIGHT, April 3rd, 1909. Dimensions. —140 mm. by 140 mm. ; weight, 250 lbs., without fly-wheel or magneto. oPanhard 35-h.p.—Four-cylinder vertical waier-cooled engine of specially light construction, the weight being only 90 kilogs. as belt-driven pump, and splash is allowed to take place also. The corrugated copper water-jackets are soldered into a groove at the bottom and clamped down by the cylinder-head, which screws in place, at the top. The water-connection between adjacent cylinder- jackets is made by closing the gap between two abutting pipes with a rubber ring held in place by a steel strap. Dimensions. — 110 mm. by 140 mm. ; weight, 90 kilogs. ; h.p., 35 at 1,000 r.p.m. ; price, 10,000 francs. (To be continued.) 7IO
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