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).
Request to purchase Zenith resistance units required for speed control on endurance test rigs.
| Identifier | ExFiles\Box 167\2\ img124 | |
| Date | 17th March 1938 | |
| 6103 To EJJ. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}15/JH.17.3.38. re Endurance Test Rigs. Will you please obtain for us from the Zenith electric Co.Ltd., the following units, required for means of speed control for the endurance test apparatus. 1 Tubular variable resistance. Type 'B' 172 ohms 1.2 amperes. (List price 27/-) 1 Zenite resistance type Z1. 126 ohms .5 amperes. (Complete with clips) (List price 5/6) O/N.816. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||