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).
Graph plotting the temperature of a Wraith carburettor over time with different types of washers.
| Identifier | ExFiles\Box 7\4\ X 608 Carburetter-page26 | |
| Date | 16th May 1938 guessed | |
| WRAITH CARBURETTOR TEMP WITH DIFFERENT WASHERS BETWEEN CARBURETTOR AND INDUCTION PIPE TEMP °C TIME - MINS INDUCTION PIPE (SAME IN EACH CASE) CARBURETTOR (THIN COPPER + ASBESTOS WASHER) CARBURETTOR (15/30 INSULATING WASHER) UNDER BONNET TEMP IN EACH CASE 57 - 63 °C WATER TEMP 90 - 92 °C READINGS TAKEN FROM POINT AT WHICH INDUCTION PIPE TEMP BECOMES CONST | ||