Slide valve timings

Live steam buffs .... which of the two following slide valve settings will give the better performance in full gear on a compound HP/LP cylinder:

Advance at 122 degrees (or 32 degrees before the 90) figures in percentage:

Admission 0.17 0.31 Cut-off 59.3 75.58 Exhaust 93.35 96.48 Compression 12.77 22.93 Lead 0.015 0.015

Advance at 131 degrees Admission 1.28 2.39 Cut-off 53.18 69.07 Exhaust 88.15 93.4 Compression 17.87 29.63 Lead 0.04 0.04

Alan

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Alan Marshall
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