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).
Instructions for experimental car testing regarding cooling, engine noise, body booming, and squeaking servos.
| Identifier | ExFiles\Box 24\5\ Scan179 | |
| Date | 1st June 1929 | |
| X766 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby, Angleterre. Hs{Lord Ernest Hives - Chair}/Rnl/LG28. 6. 29. X5840c Hotel de France, Chateauroux, Indre, France. Mr. Hancock from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} We have received your report on the cooling of the 20 HP. car and from it are quite satisfied that we can safely carry on making the larger bore 20 HP. with a radiator similar to that on 17-G.{Mr Griffiths - Chief Accountant / Mr Gnapp} When you have handed 17-G to PN.{Mr Northey} at Grenoble we want you to take over 21-EX car and with it confirm a number of results which we have obtained on our experimental cars since the 10,000 miles on 22-EX. The points which we have been investigating here are: (1) General engine noise and body booming. We have found that we can greatly reduce the tendency of the body to boom if we remove the centre subframe support which is metal-to-metal and only serves to locate the body sideways. The body is located sideways by turning up a strip of rubber from the rear support as per attached sketch. We want you to run 21-EX car like this to see if you can detect any body deterioration or any peculiarity of the steering due to the body being insufficiently supported. (2) Squeaking servo. All our servos squeak when lined with contd :- | ||