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 comparing the cooling performance and speeds obtained with three different Bentley fan types against a no-fan configuration.
| Identifier | ExFiles\Box 87\1\ scan0118 | |
| Date | 24th October 1934 | |
| SHEET (5) BENTLEY RADIATORS AND FANS COMPARISON OF COOLING AND SPEEDS OBTAINED WITH THREE DIFFERENT TYPE OF FAN AIR TEMP TO BOIL °C LEGEND (ABBREVIATED): (a) STAGGERED 20/25 FAN (b) PER. FAN (c) STD. BENTLEY FAN (d) NO FAN DATA LABELS ON GRAPH: LAP SPEED 83.6 M.P.H. LAP SPEED 84.0 M.P.H. LAP SPEED 84.5 M.P.H. LAP SPEED 85.6 M.P.H. LEGEND (DETAILED): (a) - STAGGERED 20/25 TYPE FAN HAVING TWO PAIRS OF BLADES WITH 60° BETWEEN BLADES OF EACH PAIR. (b) - PEREGRINE FAN (c) - STD BENTLEY FAN (d) - NO FAN FITTED. HORIZONTAL AXIS: CAR SPEED 30 M.P.H. FULL THROTTLE 40 M.P.H. FULL THROTTLE 60 85 M.P.H. FULL THROTTLE SIGNATURE & DATE: C.S. Steadman 24/10/34 | ||