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).
Weight reduction recommendations for the Bentley tool kit.
| Identifier | ExFiles\Box 155\4\ scan0114 | |
| Date | 5th March 1935 | |
| To Sg.{Arthur F. Sidgreaves - MD} c. to Nor. c. to E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} c. to Bn.{W.O. Bentley / Mr Barrington} 41326 Hs{Lord Ernest Hives - Chair}/GMR.9/KW.5.3.35. Bentley Tool Kit. We have gone over the whole of the Bentley tool kit with a view to saving weight and cutting out unnecessary tools. The following are our recommendations :- ITEM | PRESENT WEIGHT | LIGHTENED WEIGHT | DECREASE | % DECREASE --- | --- | --- | --- | --- Wheel Spanner. Outer & inner ribs machined off. | 2 lbs. 1 1/2 oz. | 1 lb. 9 1/4 oz. | 8 1/4 oz. | 24% Wheel Spanner. Hammer machined down. | 4 lbs. 5 oz. | 3 lbs. 6 oz. | 15 ozs. | 19% Plug Spanner deleted. (1/2 x 7/16" box spanner shortened to 3.750 long. & will do for Plug Spanner). | 5 oz. | | | 100% 1/2" sind-end Box Spanner not now required with burnt on connections of Battery. | 3 1/4 oz. | | | 100% Petrol Tank drain Plug Spanner deleted. Kit Box Spanner used in place with alteration to drain nut EX.17775 | 3 1/4 oz. | | | 100% 11/16" x 13/16 double ended spanner not required. Replaced by single ended spanner E.30140. | 1 lb. | 6 1/2 oz. | 9 1/2 oz. | 58% | ||