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 to a customer regarding the performance of the Autovac system at high altitudes and potential petrol supply defects.
| Identifier | ExFiles\Box 130\1\ scan0011 | |
| Date | 2nd March 1933 | |
| XH17 C. to H.{Arthur M. Hanbury - Head Complaints} Hd.{Mr Hayward/Mr Huddy} ---------------- Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}12/KT. March 2nd 1933. Dan Hanbury Esq, Castle Malwood, Lyndhurst, Hants. Dear Sir, We understand from our Mr.Hanbury in London that you have made enquiries with regard to fitting to your 20 HP. car a device which will assist the Autovac at high altitudes. Whilst we appreciate that the Autovac will supply less petrol to the carburetter at high altitudes than at sea level, we are perfectly satisfied that if the petrol system is in good condition, the Autovac is capable of meeting the engine's petrol demand at altitudes considerably in excess of the Stelvio Pass. The following defects in the petrol system would affect the petrol supply :- (1) Leak in the suction pipe or connections from induction pipe to Autovac. (2) Leak in the petrol pipe from the Autovac to the rear tank. (3) Choked petrol filter in the Autovac suction elbow or in the main petrol tank. (4) Faulty cork washer joint between Autovac top and Autovac tank. (5) There is a faint possibility that the Autovac mechanism itself has become faulty due to long usage. This is however rather a remote possibility. cont'd | ||