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).
The design and benefits of a thermostatically controlled louvre system for the No.5 Goshawk car.
| Identifier | ExFiles\Box 41\3\ Scan268 | |
| Date | 16th January 1923 | |
| TO Mr. [REDACTED] FROM R.{Sir Henry Royce} C. to C.J. SY. C. to Ld. [REDACTED] C. to T.H. REV C. to EFC. RE. No.5 GOSHAWK - GWYNNE ALL-WEATHER. You will remember that this car is fitted with thermostatically controlled louvres. We at W.W. think this the best scheme that we have so far tried on both our own and any other cars. If it is not too expensive and complicated, and proved reliable, we think it should be fitted as a universal standard. I believe that with a thermostat control there is less risk of boiling the water or the temperature being wrong, than when hand controlled and using a thermometer. In comparing the cost it will be noticed that the thermostat requires no fittings on the instrument board, or connection to the instrument board. This will do a lot towards providing the thermostat unit. Also, should the thermostat fail, the driver can with ease prop open the louvres, and so cancel the automatic system. We understand you have succeeded in satisfactorily filling the thermostat unit. certainly one must be capable of doing this to enable us to execute repairs. In thinking the matter over a comparatively simple arrangement suggested itself to me, namely, that we clamp the thermostat in the most compressed condition possible. We leave a tiny hole say .015 for the entrance for the liquid. We submerge the thermostat units in any convenient numbers, in a bath of (1) Handwritten text: V3730 Stamp text: RECEIVED 18 JAN 1923 | ||