Vehicle's performance and gear changes while climbing the Stelvio Pass.
| Identifier | ExFiles\Box 56\2\ Scan028 | |
| Date | 4th July 1932 guessed | |
| -5- The third day we encountered the Stelvio. The length is recorded as being 11.25 miles, but our speedometer which was as near correct as possible registered 12.4 miles. We were balked by a motor cycle combination, also a stray cow. The time allowed was 31 mins 46 secs. for an average speed of 21.12 mph. The time taken by Mr.Pass was 34 min. 14 secs. He had to reverse on the climb 26 times, eleven of these were on left hand corners. The turning circle for left hand is 48 ft. 6 ins. We calculated that a turning circle of not more than 45 ft. is the maximum that the bends could be taken without reversing, with a wheelbase of 10 ft 6 ins. It will be seen that near the top there are 4 corners where the distance between the corners are so short that after reversing the 1st. gear could only be used. Upon descending the Pass 6 reverses only were necessary, one on left hand corner. Stelvio Pass. Height (m 2759) Highest speed 40 mph. Water Temp. Air Temp. Gears (contd) (contd) (contd) 75°C 15°C 3rd. Start. 80°C " 2nd 2nd 2nd R) LH. {Mr Haworth} Reverse 1st 3rd R) 2nd 2nd 2nd 1st 3rd Reverse Reverse 2nd 82°C 2nd 1st 1st R) LH. {Mr Haworth} Reverse 2nd 2nd R) 2nd Reverse Reverse 1st 3rd 1st 1st 2nd WATER 84°C 2nd 2nd 2nd R (90°C) 1st Reverse 3rd 1st 2nd 1st Reverse 2nd 3rd 2nd 2nd Reverse 85°C 2nd Reverse Reverse 1st Reverse 1st 1st Reverse 1st 2nd 2nd 1st 2nd Reverse Reverse Reverse 86°C. Reverse 1st (87°C) 1st 1st 1st 2nd 2nd 2nd 2nd Reverse Reverse Reverse 3rd 1st Reverse 1st (90°C) 2nd 2nd 1st 2nd. 3rd 2nd 2nd 3rd Total changes 90 times. | ||
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).