The Effect of Valve Timing Upon the Performance of a Supercharged Engine at Altitude and an Unsupercharged Engine at Sea Level (1932)
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in no case for the altitudes from 0 to 18,000 feet is there more ating at engine speeds from 1,050 to 1,500 r.p.m. is shown by the curves in groups A, B, C, and Di than a 5 per cent difference between the values of the power obtained. These curves show^ that the valve timing that is best for the… … I 20 10 T. C. 10 20 30 optimum timing for the low speeds when used at 1,500 Time of exhaust closing, crankshaft degrees r.p.ni. Figure 9.—Effect of time of exhaust closing on performance timing for different engine speeds. The curves in groups E, F, G, and H represent the best timing at Langley…
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