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 providing specifications for a 25 HP exhaust system, including pipe diameter, engine displacement, and cruising RPM.
| Identifier | ExFiles\Box 104\2\ scan0103 | |
| Date | 30th July 1934 | |
| 45230 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}21/KW. 30th July, 1934. Your Ref: JOB/JA. Messrs. Huntington, Heberlein & Co.Ltd., 47/51, King William St.{Capt. P. R. Strong}, LONDON, E.C.4. Dear Sirs, For the attention of J.O. Boving Esq. We thank you for your letter of the 26th inst. The information concerning our 25 HP. exhaust system which you require is as follows :- (1) Diameter of intermediate pipe between silencer and sliding-joint = 2.000 - 7 inches outside thickness 12 S.W.G. (0.104"). (2) Total displacement of engine = 3670 c.c. (3) Normal r.p.m. at cruising speed = 2750. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||