Rolls Royce engines before 1910 were built to such close tolerances that they could sit overnight and hold compression.
Next day when the ignition was turned on the engine would start as long as the piston was just past TDC.
This was before the invention of the electric starter.
CS Rolls was the second licensed pilot in Britian, and he died in a plane crash.
Royce carried on.
regards
Mech
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