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).
Overheating issues and proposing to increase the 40/50 fan speed via a double pulley drive.
| Identifier | ExFiles\Box 14\7\ Scan047 | |
| Date | 13th August 1930 | |
| COPY. x7220 To By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}7/AD.13.8.30. 40/50 FAN. X.766. X.7220. X.196. On our recent cooling tests we have proved that the greatest factor in keeping the car cool is the fan. The new canvass rubber belt which we have standardised is quite capable of dealing with the normal fan. However, there are cases where customers have complained of over-heating and we cannot do anything for them. We have proved that if we run the standard fan at 1.3 times its present speed we get a very appreciable increase in cooling efficiency, more especially at low speeds. Can you give us a double pulley drive of this rate using two of the standard section belts, as it appears to us that there is plenty of room for this on the car and it is much simpler than having to obtain a special belt for the job? Possibly the fan bearing spindle itself may required alteration due to the increased overhang of the second belt, but we would like to run the simple scheme of the two pulleys with the existing parts first as the most rapid means of dealing with the present complaints. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||