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).
Performance tests on a new pump at various engine speeds, comparing it to an older model.
| Identifier | ExFiles\Box 82\1\ scan0163 | |
| Date | 2nd August 1933 | |
| To Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} 2/8/33 - 2 - 1000 engine revs { 38 sec for 1 pt. { or 95 pts per Hr. ( 39 sec for 1 pt. ( ( 38 sec for 1pt { ( 38 sec for 1 pt ( NEW PUMP SENT OUT 4000 engine revs { 43 sec for 1 pt { or 82.2 pts per Hr. ( 43 3/5 " " 1 pt ( ( 44 4/5 " " 1 pt { 2000 engine revs { 42 1/2 sec for 1 pt { or 85.7 pts per Hr. ( 42 " " 1 pt ( ( 42 " " 1 pt { 1000 engine revs { 48 sec for 1pt { or 75 pts per Hr. ( 48 " " " ( We have asked you to give us the best setting of the pumps but sofar have received no reply. We have therefore tried the new pump as it came out and afterwards making the diaphragm the same level as the old one with the cam at fall stroke, but up to the moment of writing we have not been able to improve it, further results will be sent, but this report will have to go or miss the post. It appear as if the return spring in the pump is not strong enough for the high speeds G.W.H. GWHancock. | ||