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).
Comparing the efficiency of a 6-bladed fan versus a 3-bladed fan.
| Identifier | ExFiles\Box 75\3\ scan0118 | |
| Date | 1st July 1924 | |
| R.R. 493 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. X3738 COPIES TO: R.CJ. ES. WOR.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Da{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} PN.{Mr Northey} OY. ES Expl. No. X3738 X.9220 REF. Hs{Lord Ernest Hives - Chair}6/LGS.7.24. OBJECT OF TEST. To prove whether 6-bladed or 3-bladed fan more efficient. TESTER. A.J.Lidsey. R.Bolton. CONDITIONS. Tests run in France on 98-NK and 35-PK. Tests run on Swinscoe Hill with 49-GB car. SUMMARY OF TEST. The average results show the 6-blade fan to be the most efficient at low speeds, and the 3-bladed fan to be the most efficient at high speeds. We have heard of customers in Switzerland obtaining better results with only 3 blades on the fan. It is probable when climbing on gears, the 3 blades would give the best results. Hs.{Lord Ernest Hives - Chair} MADRAY CROXLEY | ||