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).
Performance test data from a hill climb at Tucknall Hill, comparing different fan blade configurations.
| Identifier | ExFiles\Box 75\3\ scan0087 | |
| Date | 4th July 1919 | |
| R.R. 26 10M Bks.) (SE 591 13-3-18). M.P. 189358 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Mr Hives 4/7/19 1919 Order No. Customer's No. 603 blade for test Climbing MPH Water Air Standing 64° 5½° 20 65° 30 66 35 66 40 66½ 42½ 67 45 68 50 - return MPH Water Air Standing 64° 5½° 20 65 30 65 35 65½ 40 65 45 65 50 64 5½° 6 blade Climbing MPH Water Air Standing 61° 5¼° 20 61½ 5°° 30 62 35 62½ 40 64½ 45 65 50 65 return MPH Water Air Standing 64° 5°° 20 63½ 30 64 35 65 40 65 45 64½ 50 64½ Climbing 6 blade return Tucknall Hill Signed This Sheet must be filed on completion of the work. | ||