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).
Temperature tests comparing open and closed bonnet shutters, and plain versus louvred bonnets.
| Identifier | ExFiles\Box 119\3\ scan0035 | |
| Date | 11th March 1914 | |
| From Exp. Dept. Copies for: J.{Mr Johnson W.M.} R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} Na.{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/EHS/L11314. March 11th.1914. Re Bonnet Shutters. X.1085 Temperature tests. Comparative tests taken over the same piece of road car driven at the same speed under the same conditions for each test. 1926 car fitted with new type bonnet and radiator, enclosed body. Atmospherica temperature 8º to 10ºC. | | Water Temp. | Floorboard Temp. | |---|---|---| | Shutters closed. | 65º 64º 76º 70º 62º63º | 15º 19º 20º 20º 20º 21º | | Shutters open. | 65 61 72 68 61 63 | 19 22 23 22 24 24 | 2nd test same conditions. | | Water Temp. | Floorboard Temp. | |---|---|---| | Shutters closed. | 65º 65º 76º 70º 65º65º | 19º 23º 24º 25º 26º 26º | | Shutters open. | 65 61 70 65 61 61 | 18 25 26 25 23 23 | Tests taken on 2100E car with plain bonnet and louvred bonnet 20# radiator same conditions as above test. | | Water Temp. | Floorboard Temp. | |---|---|---| | Plain Bonnet. | 65º 65º 73º 70º 69º69º | 14º 20º 21º 20º 19º 22º | | Louvred Bonnet. | 65 60 69 65 59 62 | 15 21 20 21 20 21 | | ||