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 effort available to operate Phantom II radiator shutters with temperature rise for a Smith's Calorstat.
| Identifier | ExFiles\Box 39\4\ Scan109 | |
| Date | 3rd April 1930 guessed | |
| SMITH'S CALORSTAT FOR P II RADIATOR SHUTTERS., EFFORT AVAILABLE TO OPERATE SHUTTERS WITH TEMPERATURE RISE:-, 1. SHUTTERS FULLY CLOSED., 2. SHUTTERS FULLY OPEN. (.350" CALORSTAT MOVEMENT), 3. MAXIMUM MOVEMENT OF CALORSTAT (.390"), CALORSTAT EFFORT AVAILABLE (LBS.), TEMPERATURE (DEGREES C), RANGE OF OPERATION | ||