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).
Letter from H.M. Hobson, Ltd. regarding fuel tank tests and calibration on a 40/50 HP unit.
| Identifier | ExFiles\Box 44\3\ Scan065 | |
| Date | 9th November 1928 | |
| X4038 CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: CHISWICK 4231 (4 LINES). TELEGRAMS: "ASSEMBLAGE, LONDON". H.M. HOBSON, LTD. 47-55, ACTON VALE, LONDON, W.3. MANUFACTURERS OF Hobson K-S Petrol Telegage AND MOTOR ACCESSORIES. WORKS: LONDON AND WOLVERHAMPTON. OUR REF. TPS/MW YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG 9th November 1928. For attention of Mr. Robotham. Messrs. Rolls-Royce, Ltd., Exptl. Dept. Derby. Dear Sirs, We beg to thank you for your letter of the 8th inst., and note that you have been continuing with tests on the 40/50 h.p. unit to K-S.162. We agree that the position of the top cup could with advantage be investigated. Assuming that the top portion of the tank, beyond the 20 gallon level on the calibration shown on K-S.162, together with the high side filler, contains about a gallon, the petrol in the tank would then be standing at the 20 gallon level when the car had run approximately 13 miles; at the 19 gallon level at 26 miles, and at the 18 gallon level after it had run 39 miles. At or about this point, with the cup so placed, | ||