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).
Performance comparison report on steering, radiator, and noise between two vehicle models.
| Identifier | ExFiles\Box 123\4\ scan0270 | |
| Date | 15th July 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/IMW.{Ivan M. Waller - Head of Chateauroux}3/KW.15.7.36. Steering. 21-G-IV handles better than 22-G-V but seems as bad for joggles. Radiator. Complete absence of radiator movement was a noticeable improvement over 22-G-V, and examination showed that 21-G-IV is fitted with a centrally mounted radiator. In contrast to this the wing movement appeared worse, as 22-G-V is good in this respect. The aluminized tail pipe on 21-G-IV has become a light brown colour as on 22-G-V, and is more noticeable than the darker coloured standard pipe. There is more general noise in 21-G-IV than 22-G-V, possibly due to different acoustic properties of the coachwork. Joggles can be produced on clutch engagement on 21-G-IV but appear to come from engine movement rather than transmission, and feel different to those experienced on 22-G-V with the propellor shaft removed. Hs{Lord Ernest Hives - Chair}/I.M.Waller. | ||