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).
Commutator failure test, identifying temperature as the main cause of the moulding's disintegration.
| Identifier | ExFiles\Box 50\5\ Scan332 | |
| Date | 28th June 1920 | |
| RR 238 (1M) (BH97. 28-6-20.) MP 224398 ROLLS-ROYCE, LTD. INSTRUCTIONS. 19 To Order No. Customer's No. After the commutator had been running for 1/2 min at 6,300 rpm. four segments flew out. From the above results it will be seen that temperature is the main factor which causes disintegration of the moulding of this commutator a fact which is noticeable in [strikethrough] results obtained with other moulded commutators. A.E.W Signed This Sheet must be filed on completion of the work. | ||