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).
Illustrations and explanations of different types of wheel wobble and shimmy vibrations.
| Identifier | ExFiles\Box 170\3\ img059 | |
| Date | 15th July 1935 guessed | |
| ROTATION SPOT ON END OF SPINDLE LOOP TRACED BY SPOT IN WOBBLE OR SHIMMY CAR MOTION (1) TRUE LOW SPEED WOBBLE LOOP IS THUS ON L.F WHEEL DIRECTION OF ROTATION OF SPOT 2. WOBBLE FORCED BY EVENLY SPACED ROAD BUMPS LOOP IS THUS - 3. SHIMMY LOOP IS THUS. Low speed wobble and shimmy are self-induced vibrations i.e. they can best be produced on perfectly smooth road surfaces, although they may be "detonated" by a single bump. Wheel fight may be of a generally low-speed type in which case it is a mixture of (1) and (2), or of a generally high speed type in which case it is a mixture of (2) and (3). | ||