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 readings from tests investigating vapour lock trouble using different fuels and components.
| Identifier | ExFiles\Box 27a\2\ Scan215 | |
| Date | 24th July 1933 | |
| Rm.{William Robotham - Chief Engineer} from F.{Mr Friese} Dodd. 24.7.33. Re. Vapour Lock Trouble - 4.B.IV. 22-23.7.33. Temperatures taken on 4.B.IV. fitted with:- Petrol Pump - feed pipes to Carbs. and carb. float chamber tops from 3.B.IV. using O.S. petrol tap and running on Ethyl petrol. 5/16" dia. pipes. to carbs. External Bonnet Oil Water Air Temp. oC. Temp. N.S. Temp. Temp. oC. 25 50 95 87 24 50 100 90 24 48 97 86 AV. 24.3 49.3 97.3 87.6 ----- Temp. taken with parts fitted as above but engine running on DTD.134. 24. 49. 97. 86 ----- On standing after a hard run Bonnet temps. rose as follows :- Exhaust side. Carb. side. 72oC 58oC. ----- R Temperatures taken with parts fitted as above but using N.S. petrol tap and running on mixture of DTD.134 & Ethyl. External Bonnet Oil Water Air Temp. oC. Temp. N.S. Temp. Temp. oC. 26 50 82 87 27 50 87 90 25 50 90 87 26 50 93 90 50 95 88 AV. 26.3 50 89.4 88.4 Standing after hard run. Exhaust side. Carb. side. 70oC. 57oC. F.{Mr Friese} Dodd. | ||