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).
Engine cooling issues, a new fan design, and the benefits of louvres over shutters on bonnets.
| Identifier | WestWitteringFiles\M\October1924-December1924\ Scan64 | |
| Date | 1st December 1924 | |
| ORIGINAL TO HS.{Lord Ernest Hives - Chair} & EFC. FROM R.{Sir Henry Royce} R2/M31. 12. 24. Copy to CJ. BJ. Copy to RG.{Mr Rowledge} H.{Arthur M. Hanbury - Head Complaints} Copy to DA.{Bernard Day - Chassis Design} 40/50. WATER BOILING. X766 X3456 X1017 EFC. has found a fan which promises to be better than our standard - i.e. with a bigger push at the air for less HP., therefore easier to drive, and belt drive more reliable. I should like this tested on the road against the standard fan to see if it gives any hope of lower temperature. I have a suspicion that our shuttered bonnets are not opened when needed and we get a bad name because they can be closed, whereas others like Hispano, with louvres which are always open, do not so suffer. Also a long line of louvres are better than shutters. We must not trust to shutting up our engine for silence. In 'V' series we have also advantages of less heat to the water per HP., and slightly larger front face, which we again increase at 'W' series. R.{Sir Henry Royce} [Signature] | ||