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 changes to the gearbox, axle universal joint, cylinder head, and pump drives for the 'NE Goshawk II'.
| Identifier | ExFiles\Box 105\2\ scan0062 | |
| Date | 18th January 1921 | |
| R.R. 285A (100 T) (S.H 798, 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 x 4254 To Ds. from R.{Sir Henry Royce} R3/G18.1.21. c. to CJ. c. to HJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} c. to Ey. x 4219. NE GOSHAWK II. (1) We are sending you on Wednesday the design for the gearbox. You will see we have arranged for this to have the intermediate bearings because it makes a more silent box and also saves most of the load on the one doubtful bearing at the front end of the shaft, upon which the gears slide. You will also notice that the constant drive for the reverse has been made helical to avoid the possibility of noise from the constant running reverse pinion. This has been done without much expense, and without lengthening the box, it is sure to make the box more silent. (2) We have decided to fit the cross pin universal on the back axle as earlier anticipated, and test if the fabric will allow for the pumping. The fabric will be carried on a hub with long boss so as to slide into the best position and arranged so that if an excessive strain get on the fabric of the coupling it can slide its hub along on parallel keys which should be kept greased automatically from the box. We are doing this because of the difficulty of making an oil-tight and dirt-tight job of the sliding pot, if this is on the back axle. (3) We expect to send you the drawing of the latest detach-able head for the cylinders. We have entirely rearr-anged this so that we can get any amount of heat of the exhaust gases can be given to the induction pipe. It would be costly and ineffective if the exhaust came out on the other side from the inlet trunk pipe. This engine, if any, should be capable of running with the very lowest grade of petrol. The engine should be better than the best of its kind, because the plugs are in the best and most accessible place. The [strikethrough]carburetter-will-not-drop-petrol[/strikethrough] valve gear is properly enclosed without being clumsey. the carburetter will not drop petrol on the red hot exhaust pipe and the exhaust is well clear of the dash, the starter motor, and the dynamo. (4) We have also finished the drive for the water pump, the oil pump, and the battery ignition we have decided to keep this latter away from the dynamo because it allows of any dynamo being used, and also the distributor will be quite close to the ignition plugs. Contd. | ||