Word: poppets
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Dates: during 1920-1929
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...Army flyers had swooped into the air from Los Angeles. Their resolve was to shatter all existing records for endurance flights, to stay in the sky until men or engines succumbed. Experts had allowed their three Wright Whirlwind motors 400 flying hours before bearings splintered and cracked, poppet valves ceased to pop. The wind-bronzed flyers seemed staunch, infallible...
This Knox annoyed Mr. Knight with the noise its poppet valves made. He tinkered with it; thought; devised the sleeve-valve principle...
...motor makers scorned his invention. They preferred the poppet valve system of George B. Selden (1845-1922) of Rochester, even though they had to pay royalties on his alleged basic patents...
...trip, bought the rights for the light car field. No U. S. passenger cars but the Stearns-Knight and Willys-Knight may yet use this motor, although the Federal Truck has it and, strangely, the Yellow Cab, which is now owned by General Motors, great maker and marketer of poppet-valve motor cars...
...little machines will be in three models-a two-door coach and two-seat coupé (both $735 f.o.b. factory) ; a touring car ($645). They have a four-cylinder, small-bore, poppet-valve engine of 15 horsepower on a 4% in. stroke. Their wheelbase is that of the Ford and Chevrolet, 100 in. The overall height is 5 ft., 8 in. with a low centre of gravity due to an 8% in. axle-clearance and the standard 56 in. tread. Tiny balloon tires, smaller even than Ford balloons, have been furnished by Fisk...