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).
Letter discussing a fault with a heater's rheostat and its return for inspection.
| Identifier | ExFiles\Box 137\2\ scan0010 | |
| Date | 20th January 1938 | |
| -2- 20th. January 1938. that they see no reason why a resistance (between the last stops of the rheostat) should be left in circuit with motor running at full speed (this is a Rolls-Royce heater switch). They have corrected one installation accordingly and it is now functioning satisfactorily. Will you please let us have your comments on this subject. The heater which we are returning (complete with switch) is suffering from these troubles, so we thought it might be of interest to you. Its speed fluctuates badly and it does not commence to run at the lowest speed position of the rheostat. Yours faithfully, for ROLLS-ROYCE LTD. | ||