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).
Comparing the reliability of Firths springs and Woodhead springs for the Bentley car.
| Identifier | ExFiles\Box 87\4\ scan0022 | |
| Date | 9th January 1934 | |
| To Wor.{Arthur Wormald - General Works Manager} From Hs.{Lord Ernest Hives - Chair} c. to E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair}3/MJ.9.1.34. SPRINGS FOR BENTLEY CAR. We have run a 10,000 miles test in France on Firths springs on Peregrine 11 car. These springs are the same for length and size as the present Bentley. Comparative tests were made on a further 10,000 miles test with Woodhead springs. Both gave the same degree of reliability and therefore we consider there is no reason whatever for changing over to Firths springs on Bentley chassis. Hs.{Lord Ernest Hives - Chair} | ||