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).
The laboratory tests conducted on a Clayton car heater.
| Identifier | ExFiles\Box 137\1\ scan0124 | |
| Date | 2nd June 1932 | |
| Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} from Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Est.1/AD.2.6.32. TESTS ON CLAYTON CAR HEATER. We have now carried out tests in the lab. on this car heater. The apparatus was first tested for insulation. The motor mounted inside the heater, was normally insulated from the metal framework, but it was found that there was a slight leak when tested at 200 volts. At the lower, voltages (15 volts) there was no sign of any leakage. The leakage was negligible even at the higher voltages, we consider this apparatus to be O.K. as regards insulation. The insulation of the control switch was found to be quite O.K. The fan motor was then connected up with its control switch to a 12 volt battery. This switch consists of a long tapped resistance giving an "off" position and five running positions. It was run for a few minutes at full speed in order to warm up the bearings after which the following readings were taken:- Contact Speed Amps Volts. 1 1535 .70 8.33 2 1775 .72 9.30 3 2040 .73 10.03 4 2255 .77 11.15 5 2560 .79 12.22 As regards the quietness of operation, the motor just gave a faint noticeable hum at high speeds, otherwise it was perfectly good in operation. As far as we can see, the apparatus appears to be quite good and reliable. Hs{Lord Ernest Hives - Chair}/Wst. | ||