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 savings achieved and proposed for tool kit items like box spanners and a Dunlop jack.
| Identifier | ExFiles\Box 155\4\ scan0115 | |
| Date | 5th March 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}9/KW.5.3.35. ITEM | PRESENT WEIGHT | LIGHTENED WEIGHT | DECREASE | % DECREASE ---|---|---|---|--- Set of Box Spanners shortened by 1" in length. 1 x 7/16" BHA x 7BA. 1BA x s. 5/16" x 3/8". Can be adopted in all Tool Kits. | 1 lb. 0 1/4 oz. | 12 1/4 oz. | 3 1/4 oz. | 24.5% Present Dunlop Jack Handle shortened 10 inches. | 2 lbs. 8 oz. | 1 lb. 15 1/4 oz. | 8 1/4 oz. | 21% Making a total saving in weight of 32.7% We are also in communication with Dunlops with a view to producing a new lightened Jack and Handle, similar to the Buick, which will give a saving in weight of approx. 60%. Present Dunlop Jack - 6 lbs. 11 ozs. Jack submitted to Dunlops - 3 lbs. 6 1/2 ozs. 1 lb. will be saved on the Jack Handles, making a total saving on the Jacks & Handles of 4 lbs. 4 ozs. HE/GWH.{George W. Hancock - Head Chateauroux} | ||