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).
Pump and compressor performance tests, including analysis of alternative shock absorber fluids.
| Identifier | ExFiles\Box 179b\2\ img224 | |
| Date | 23th December 1932 | |
| -3- He/Rn.{Mr Robinson}1/KT.23.12.32 Pump Press. 10/sq.in. | Release Press. Pump Speed R.P.M. | When Release Occurs. | When Release is incr. 1 lb/sq.in. | When Release Occurs. | R + 1 | Delivery at (R+1)lb/sq.in. Pts/Hr. 128 | 3 | 4 1/2 | 2 | 3 | 1.9 256 | 9 | 10 | 8 1/2 | 9 1/2 | 2.04 342 | 14 1/2 | 15 1/2 | 14 | 15 | 1.95 Wakefields now produce a fluid of Castor oil and Wood Alcohol which, if we use the sylphon in the shock absorber, could be used. It is much cheaper than Lockheed fluid and has almost exactly the same viscosity curve. It may help us to keep the pipe sizes down between the governor and the shock absorber. With restriction in the pipe from B. to A.{Mr Adams} reduced, and the new governor valve to N. scn. 3593, we made a test on the complete unit, with the following results:- Compressor. Equiv. Road Speed M.P.H. | 20°C Pump Press. lbs/sq.in. | 20°C Release Press. lbs/sq.in. | 40°C Pump Press. Lbs/sq.in. | 40°C Release Press. Lbs/sq.in. | 60°C Pump Press. lbs/sq.in. | 60°C Release Press. lbs/sq.in. 30 | 4 | 2 | 4 | 2 to 3 | 3 | 1 to 2 60 | 12 to 13 | 9 to 10 | 10 | 8 to 9 | 11 | 9 to 10 80 | 18 to 19 | 17 to 18 | 19 to 20 | 18 to 20 | 17 to 18 | 16 to 18 These we think are very satisfactory readings, the release fluctuations having almost entirely disappeared. They are now so slight that they never get to the shock absorber as they are damped out by the connecting pipe. It will be observed that the fluctuations are greatest when the thinnest oil is used, and the highest pressures are reached. We do not think that the damper as arranged will stand much more than 15 lbs/sq.in. from the governor (i.e. 300 lbs. ball pin load), but in case the trouble crops up at a future date, we made some tests | ||