Material change from 'Halo' to RAD.13 for the Wraith Servo on the 'C' series chassis.
| Identifier | ExFiles\Box 9\4\ 04-page25 | |
| Date | 30th November 1938 | |
| 641 LA. {L. A. Archer} Rm. {William Robotham - Chief Engineer} Mx. {John H Maddocks - Chief Proving Officer} BY.34/N.30.11.38. Wraith - Servo. ----------- Referring to your memo LA. {L. A. Archer} 3/T.30.11.38, the RAD.13 Material has been instructed for 'C' series chassis in place of "Halo" material. BY. {R.W. Bailey - Chief Engineer} | ||
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).