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).
Experimental job on Spectre under-bonnet temperatures, using thermostatically operated shutters.
| Identifier | ExFiles\Box 92\6\ scan0268 | |
| Date | 10th September 1935 | |
| STEADMAN. x305 To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}1/HP.10.9.35. c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHC{R. H. Coverley - Production Engineer} SECRET. SpectreCodename for Phantom III under bonnet temperature. We send you herewith:- LeC.4698 showing a bonnet fitted with thermostatically operated shutters. This is an experimental job with the object of finding out the best position and number of shutters, and the most desirable place to put the thermostat. The design has been arranged so that any number of shutters from 1 to 5 can be opened, and also the thermostat can be put at the front of the bonnet, or at the rear. As regards the thermostats, three different fillers should be instructed. E.{Mr Elliott - Chief Engineer} has already discussed this job with Hs{Lord Ernest Hives - Chair}/Steadman. LeC.4698 herewith. E/JNR.{Charles L. Jenner} | ||