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 cooling performance and speeds obtained with three different types of Bentley fans.
| Identifier | ExFiles\Box 155\1\ scan0172 | |
| Date | 24th October 1934 | |
| SHEET (5) BENTLEY RADIATORS AND FANS COMPARISON OF COOLING AND SPEEDS OBTAINED WITH THREE DIFFERENT TYPE OF FAN Y-AXIS: AIR TEMP TO BOIL °C X-AXIS: CAR SPEED DATA POINTS: (a) - STAGGERED 20/25 FAN - LAP SPEED 83.6 M.P.H. (b) - PER. FAN - LAP SPEED 84.0 M.P.H. (c) - STD. BENTLEY FAN - LAP SPEED 84.5 M.P.H. (d) - NO FAN - LAP SPEED 85.6 M.P.H. X-AXIS LABELS: 30 M.P.H. FULL THROTTLE 40 M.P.H. FULL THROTTLE 60 85 M.P.H. FULL THROTTLE LEGEND: (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 SIGNATURE: E.R. Steadman | ||