From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Reduction of crankshaft stroke for the Reisport engine to raise its critical speed.
| Identifier | ExFiles\Box 85\5\ scan0015 | |
| Date | 29th August 1923 | |
| A.{Mr Adams} From HS{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. to Mr. H.R. c. to A.{Mr Adams} HV. c. to Hdy.{William Hardy} D.{John DeLooze - Company Secretary} 217 HS{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}2/ML.29.8.23. REISPORT CRANKSHAFT. In order further to raise the critical speed of the crankshaft for this engine it has suggested reducing the stroke to 3 1/2" or 3 1/4". The corresponding engine sizes would be 2010 cc and 232 cc. We attach a table showing the approximate speeds of the torsional period under these conditions. We think that [illegible] R.P.M. would be allowed for the safe limit when a damper is fitted. As yet we do not know the effect of the supercharger. HS{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||