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).
Test results for Phantom II exhaust hot spot temperatures under different driving conditions.
| Identifier | ExFiles\Box 14\6\ Scan318 | |
| Date | 13th April 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X223 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}10/KW.13.4.35. Phantom II Exhaust Hot Spot Temperatures. --------------------------------------- Tests carried out on 28-EX, using an Elliot Millivoltmeter No.1121620 and thermo couple of Eureka and copper wires. Max. Temp. Full throttle climb of 1 mile at constant 20 MPH. 99°C corrected " " " " 2 " " " 30 " 110°C " " " " " 1 " " " 40 " 134°C " Light running at constant 30 m.p.h. for 5 miles averages 62°C. corrected. General running not exceeding 50 m.p.h. for 10 miles averages 86°C. corrected. Engine ticking over at 300/400 r.p.m. from cold 28/30°C.approx. Running free at 750 r.p.m. registers 38°C. corrected. " " "1200 " " 56°C. " " " "1500 " " 56°C. " From 1500 r.p.m. to tick over at 300 r.p.m., temperature drops to 37°C. in 2/3 minutes. Hs{Lord Ernest Hives - Chair}/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Ratcliffe. | ||