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).
Design specifications for various engine components including the fan, oil system, exhaust, and carburetter.
| Identifier | ExFiles\Box 30\2\ Scan108 | |
| Date | 9th November 1932 | |
| - 3 - (12) Fan. - A small fan will be used on Bensport J.1. and this may be the same as that used on the Peregrine. (13) Oil Relief Unit.- The standard 20/25 oil system will be used having one relief valve only, and the relief oil discharged into the wheelcase. (14) Oil Level Indicator.- This will naturally not be required on the dry sump, but a device replacing it will be incorporated in the oil tank carried under the front apron. (15) Oil Filter. This will be similar to the one used on the dry sump of the 20/25 tank engine, and is much more accessible than the standard 20/25. (16) Exhaust Fittings.- These will be like the present J.1. passing down the centre of the engine, with balanced flow from each end of the cylinder head. No sliding joint in the exhaust pipe to the silencer, and silencer hung on links. (17) Exhaust Manifold - will be in Cast Iron like Ph.2 and is already on the engines in existence. (18) Carburetter and Induction Pipe. - It is agreed that S.U. carburetters of 1.375" diameter will be satisfactory. They give 1% more at low speed, and 1% less power at maximum speed. The induction pipe design for these carburetters should be issued this week. (19) Air Silencer and Cleaner.- This will require some experimenting with before the final form is decided. (20) Engine Controls.- The design for the engine controls has not yet been started, but it is hoped that by the end of next week we shall have it ready. (21) Engine Mounting.- The engine mounting will be as closely as possible like 19-G-4 in principle, which is in its turn like the standard 20/25. The front part of the mounting - Let. 3258 has already been issued for the first engine unit, and this also applies to the proposed design for Bensport J.1. The rear arms for taking the torque for | ||