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).
Procedure and results of frame deflection tests for the 40/50 HP New Phantom and 20 HP Car.
| Identifier | ExFiles\Box 67\1\ scan0189 | |
| Date | 23th August 1926 | |
| To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 48380 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG23. 8. 26. FRAMES. X8380 X5380 Replying to DA{Bernard Day - Chassis Design}1/M19.7.26. The frame was supported at the centre lines of the axles, and levelled up. A lifting Jack was placed under the off-side front dumb iron, and by this means the front end of the frame was raised. When the near-side front dumb iron was just on the point of moving, the distance the O.S. had already moved was measured. This being the deflection. The same procedure was then repeated at the rear end of the frame. The mean of the O.S. and N.S. was taken :- 40/50 HP. NEW PHANTOMCodename for PHANTOM I. Deflections :- Front .820" Rear 1.030" Weight of frame 308 lbs. 20 HP. CAR. Deflections:- Front 1.23" Rear 2.10" Weight of frame. 224 1/2 lbs. The 20 HP. figures are not very satisfactory because the O.S. and N.S. of the frame do not coincide very closely. We will repeat the test as opportunity occurs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||