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).
Report and diagrammatic sketch explaining the Maybach Overspeed Gear system.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan098 | |
| Date | 7th October 1930 | |
| Typed Document Text: -3- Hs{Lord Ernest Hives - Chair}/AL.7.10.30. Contd. difficult to detect if this was of sufficient magnitude to be appreciable under road conditions. Generally speaking, we were more impressed by this arrangement as a means of improving the car when handled by inexpert drivers under modern traffic condition, than we have been by anything since the introduction of four wheel brakes. Its behaviour in the hands of the public will shew whether the design is satisfactory. Maybach Overspeed Gear. We examined the dogs on this box. They are only backed off about 10° in each case in such a manner as to prevent the dogs engaging until the car and axle speed are synchronous (see Sketch. The spring causing engagement is not exceptionally strong. A Dewandre vacuum relay is used to operate the togs attached. The reason this lever which pre-selects the operated by the lightest fi it is necessary to employ a when using the easy change pre-selection is automatic by the spring as soon as th Blueprint Diagram Text: DIAGRAMMATIC SKETCH OF MAYBACH OVERSPEED B FREE TO ROTATE ON ENGINE SHAFT A SPLINED DIRECTLY ON CLUTCH SHAFT C SPLINED TO PROPELLOR SHAFT AND GEARED TO B EDGES OF DOGS PERFECTLY SQUARE AXLE ANGLE OF BACK OFF 10° APPROX 3 DOGS ONLY CLUTCH SHAFT A ENGAGED WITH B | OVER OR TOP SPEED ENGINE SPEED 1/2 OF PROP SHAFT A ENGAGED WITH C | DIRECT OR 5TH SPEED DIRECT DRIVE CHANGING UP A ENGINE SPEED FASTER THAN B. ENGINE MUST BE ALLOWED TO SLOW DOWN BEFORE ENGAGEMENT CAN TAKE PLACE CHANGING DOWN REVERSE PROCESS. | ||