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).
Road test report on the 25/30HP chassis detailing the propeller shaft hitting the crossmember on rebound.
| Identifier | ExFiles\Box 105\2\ scan0151 | |
| Date | 20th April 1936 | |
| c.HS{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} X537 from Mx.{John H Maddocks - Chief Proving Officer} Mx{John H Maddocks - Chief Proving Officer}15/T20.4.36 25/30HP Chassis. With regard to the question of the clearance of the propeller shaft and the slotted crossmember on rebound, we have now had an opportunity of testing this on a chassis on the road, and we find that the propeller shaft will hit the crossmember when travelling at 55 miles per hour over a culvert bridge on the Willington-Barrow road. [Handwritten note:] GRY.{Shadwell Grylls} How bad is the damage. Would the passengers neck be broken by this test. [Signature: Rm{William Robotham - Chief Engineer}] | ||