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).
The operating times and component weights for a jacking system.
| Identifier | ExFiles\Box 139\2\ scan0447 | |
| Date | 20th December 1935 | |
| -3- Time taken to operate & release Jacks. To pump all jacks to full extension - 1 min. 25 secs. (approx. 145 strokes). Time to fully release all jacks - 5 mins. 15 secs. Actually the front jacks and second stage of rear jacks release fully in 15 secs., this brings the 1st stage of rear jacks to 5 mins. to completely release. We think the .250" pipe line is responsible for the time taken on release, and Smith's are going to try a larger bore pipe to the rear axle. Weights. lbs. ozs. 2 - 2-stage rear Jacks @ 9 1/2 lbs. 19 8 2 - Rear brackets (RB{R. Bowen}-50) @ 5 1/4 lbs. 10 8 2 - Front Jacks @ 6 lbs. 12 0 2 - Front brackets @ 3 lbs. 6 0 1 - Distributor pump (in bronze) 10 4 3 - Single knuckles @ 1 lb. 3 0 1 - T Piece & Knuckle 1 3 Tube, handle & Tank (approx.) 5 0 --- 67 7 --- Hs{Lord Ernest Hives - Chair}/J.Bowering. | ||