Test results comparing 3 and 6 blade fans, measuring water and air temperatures under various speed and road conditions.
| Identifier | ExFiles\Box 75\3\ scan0086 | |
| Date | 14th January 1919 | |
| ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Mr. Hewson Date: 14/1/1919 Reference Number: X3438 3 Blade Fan. Icknield Hield 2 tests Climbing MPH | Water | Air Standing | 64° | 68° | 5 1/2° 20 | 65 | 68 1/2 | 5° 30 | 66 | 68 1/2 35 | 66 1/2 | 69 40 | 67 1/2 | 70 45 | 68 | 71 50 | 69 | 71 Return MPH | Water | Air Standing | 64 | 65 | 5 1/2 20 | 63 1/2 | 67 | " 30 | 64 | 67 | " 35 | 64 | 66 1/2 | " 40 | 64 | 66 | " 45 | 64 | 66 | " 50 | 63 | 65 1/2 | " London Rd. 30 MPH 2 miles 3 Blade up | down | Air 65° | 65 1/2° | 5 1/2° 65 | 66 6 Blade up | down | Air 64 | 64 | 6 64 | 64 1/2 Ingram test 1,000 Engine Run 6 Blade Fan 0°C to 90°C - 9 min 3 Blade Fan 0°C to 90°C - 8 min Signed [Illegible] | ||
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).