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 showing the test results for the RV60 thermostat with 'C' filling, plotting temperature against load.
| Identifier | ExFiles\Box 39\4\ Scan198 | |
| Date | 15th November 1930 | |
| CENTIGRADE 100° 90° 80° 70° 60° 10 20 30 40 50 60 70 80 90 LBS RESULT OF TESTS WITH "C" FILLING RR THERMOSTAT RV60 MEASUREMENTS TAKEN AT LIMIT OF TRAVEL (.425") ARRANGEMENT No E80893 15-11-30 | ||