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).
Clarifying weight calculations for a 20-GIV model, correcting for accessories and an oversized petrol tank to determine a final body weight.
| Identifier | ExFiles\Box 179\2\ img272 | |
| Date | 22th February 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}1/AM22.2.32 contd. The total weight of 20-GIV was 35 cwt. 2 qrs. 21 lbs deducting the above chassis and spares weight (2991 lbs.) we arrive at a calculated body weight of 8 cwts. 3 qrs. 21 lbs. In our previous memo (which we attach herewith in order to clarify the issue) we gave a body weight including all tools, spares and accessories, of 10 cwt. 1 qr. 10 lbs. We find that in addition to having included all spares and accessories in this weight we had overlooked the fact that chassis 102-GPT when weighed with 20-GIV body fitted, was fitted with the large (18 gall.) petrol tank. In order to arrive at a correct figure for the body weight alone it is necessary therefore, to deduct from the above weight of 10 cwt. 1 qr. 10 lbs., the difference between the two petrol tanks and the weight of the spares and accessories excluding the spare wheel viz. 43 lbs. and 80 lbs. this leaves us with a bare body weight of 9 cwt. - 26 lbs. There is an unexplained discrepancy of 30 lbs. between the two methods of arriving at the body weight, so that if we split the difference and call the weight 9 cwt. 11 lbs, we do not think we shall be very far out. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} Attached - Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}E/MA28.12.31. | ||