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 test results for a car with and without a lagged exhaust box over a 20-mile course.
| Identifier | ExFiles\Box 75\4\ scan0164 | |
| Date | 23th October 1912 | |
| TEMPERATURE TEST X819 23.10.12. 3500 Temperature tests 1914 with + without lagged exhaust box. No dash-board extension in, 5 minute readings over 20 miles at average speed of 30 m.p.h. Sunshine, strong wind from off side taken by Peat (ExpDept) 4.9.12. Radiator | Floorboards | Interior | Remarks. 64 32 1/2 28 With Lagging 75 33 29 1/2 Atmospheric temp. 14°C. 75 33 28 1/2 76 33 28 1/4 78 * 33 29 * slowed down 76 32 1/2 29 76 1/4 33 1/2 29 1/4 --- 68 31 1/2 27 1/2 Without lagging 72 33 28 1/2 Atmospheric temp. 16°C. 73 33 29 73 1/2 32 1/2 28 1/4 72 33 28 1/2 72 1/2 33 28 1/2 72 1/2 33 29 Test taken by Peat 1/2 See Exp file T. 1/12 R | ||