Unsuitability of a shoe type servo and proposing a two-plate servo for the Peregrine gearbox.
| Identifier | ExFiles\Box 179b\1\ img199 | |
| Date | 30th November 1932 | |
| HS. {Lord Ernest Hives - Chair} FROM DA. {Bernard Day - Chassis Design} C. to SG. {Arthur F. Sidgreaves - MD} WUH. BY. {R.W. Bailey - Chief Engineer} [REDACTED] PEREGRINE(Experimental Bentley car never produced / Aero Engine) SERVO. [Handwritten]: x4027 The shoe type servo - N. sch. 3610. - which we have now sent to Derby is not suitable for Peregrine(Experimental Bentley car never produced / Aero Engine) because we cannot, as far as we know, increase the centres of the bridge on the Peregrine(Experimental Bentley car never produced / Aero Engine) gearbox. It was suggested that we should try a two plate servo [Handwritten note]: N.Sch 3612 ✓ with the idea of reducing the pressure per sq. in. and the end load, and we submitted a sketch of this arrangement to R. {Sir Henry Royce} at the same time as we submitted the shoe arrangement. R. {Sir Henry Royce} preferred the shoe arrangement, but in view of the difficulty with Peregrine(Experimental Bentley car never produced / Aero Engine) we are sending you a sketch of the two plate servo in case it is of any use to you in overcoming the Peregrine(Experimental Bentley car never produced / Aero Engine) difficulties. It is not a design but merely a sketch of the idea, but we think it will be seen that it will go into the existing Peregrine(Experimental Bentley car never produced / Aero Engine) space. DA. {Bernard Day - Chassis Design} [Signature] | ||
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).