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).
Table of propeller shaft lengths and their corresponding safe operating speeds for various chassis.
| Identifier | ExFiles\Box 179b\3\ img138 | |
| Date | 6th February 1933 | |
| ORIGINAL To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. S. Da.{Bernard Day - Chassis Design} c. By.{R.W. Bailey - Chief Engineer} Hdy.{William Hardy} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}1/ET.6.2.33. Y4037 PROPELLER SHAFTS. EL/30.2.33. We are sending you a table of the lengths of the propeller shafts between universals on our various chassis, together with an estimate of the safe maximum speed, assuming 4000 R.P.M. for the 20/25. This figure was obtained on 19.G.IV. when fitted with a J.I. unit. Length. Safe Speed RPM. 20/25. 54.875 4000 3" Dia. Peregrine long type. 56.750 3730 3" Dia. Peregrine short type. 41.250 7000 2¾" Dia. Peregrine short type. 41.250 5200 3" Dia. J.III. 54.875 4000 3" Dia. Bansport. 52.872 4300 3" Dia. Peregrine to run 5000 RPM. 49.000 5000 We should not, therefore, expect to be able to run a Peregrine chassis up to 5000 RPM. with a shaft longer than 49", and would rather that it were shorter. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||