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).
Internal memorandum detailing the weight reduction of a new lightened type of jack compared to the old standard.
| Identifier | ExFiles\Box 139\2\ scan0196 | |
| Date | 5th February 1935 | |
| 43117 To Hy.{Tom Haldenby - Plant Engineer} c. to E.{Mr Elliott - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}17/KW.5.2.35. Re D.W.S. Jacks - Lightened Type. The information required re the above - This type of Jack is 11.8% lighter than the present standard, i.e., 4 lbs. 8 ozs. Old Jack - 37 lbs. 12 ozs. New Jack - 33 lbs. 4 ozs. Hs{Lord Ernest Hives - Chair}/G.W. Hancock. | ||