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).
Secret report on the inefficiency and weakness of the Hispano servo motor.
| Identifier | Morton\M20.2\ img028 | |
| Date | 29th April 1924 | |
| To R.H. From H.S. C. to C.J. C. to [illegible] C. by W.M. ORIGINAL S E C R E T. HISPANO SERVO MOTOR. [Handwritten: 44214 X1559] As pointed out in a previous report, when the Hispano unit was re-built we could not get any braking owing to the inefficiency of the servo. The previous figures given for the efficiency of the Hispano servo were taken with the servo in its ineffective condition. The figures attached were taken with the servo in a [handwritten: normal] powerful condition. These tests show a weakness in the Hispano servo inasmuch as its efficiency depends so much on the bedding and wrapping of the shoes. Hs.{Lord Ernest Hives - Chair} | ||