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).
Suggesting a test to diagnose a vibration complaint on a Phantom suspension.
| Identifier | ExFiles\Box 67a\1\ scan0113 | |
| Date | 27th March 1926 | |
| To Hs.{Lord Ernest Hives - Chair} from DA.{Bernard Day - Chassis Design} X. 8410 DA{Bernard Day - Chassis Design}3/M27.3.26. RE. PHANTOM SUSPENSION. It is suggested that the complaint may be forced vibration from the road only, and the periodicity may be that of the irregularities of the road, and not of any part of the suspension, though it sets the rear suspension going. To test this we suggest blocking out both front and rear springs with wooden blocks, and pumping up the tyres as hard as possible so that if the car is pitching fore and aft on the irregularities of the road only, it ought to be apparent to a person sitting in the back seat. DA.{Bernard Day - Chassis Design} | ||