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).
Comparing stresses in Bensport and Peregrine differential gears with other car models.
| Identifier | ExFiles\Box 84\4\ scan0004 | |
| Date | 20th April 1933 | |
| Hs.{Lord Ernest Hives - Chair} from Da.{Bernard Day - Chassis Design} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} H.{Arthur M. Hanbury - Head Complaints} c. to By.{R.W. Bailey - Chief Engineer} Hdy.{William Hardy} X202. DA{Bernard Day - Chassis Design}1/N.20.4.33. BENSPORT DIFFERENTIAL GEARS. ----------------------- Referring to Hs.{Lord Ernest Hives - Chair}7/KT.11.4.33, we have gone into the stresses in these gears, with a view to comparing them with those in the differential on the other cars. It would appear that the use of the 25 HP. low gear instead of the higher Bensport ratio, would impose a stress some 20% higher than the Peregrine. On the other hand, the use of the Bensport 1st. gear ratio, brings the stress down nearly to that obtaining on Peregrine. Both on Peregrine and Bensport, the stresses our higher than on either the Phantom II or 25 HP. Differentials. We expected this to be the case, as in all probability the differentials on these two cars are stronger than need be. We think, however, that it might be desirable to strengthen both Bensport and Peregrine a little and shall send suggestions for altering the D.P. from 6 to 7 and possibly slightly increasing the diameter, immediately after the holidays. The stress in the Bensport differential is approximately 20% higher than that in the hypoid axle gears. DA.{Bernard Day - Chassis Design} | ||