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).
The 'high nip' characteristic of laminated road springs supplied by Thos. Firth & Sons Ltd for a 40/50 HP Chassis.
| Identifier | ExFiles\Box 52\2\ Scan093 | |
| Date | 7th December 1923 | |
| [Handwritten text] XW429 As have you made check tests on these By [Typed text] Dn. from Wd. {Mr Wood / Mr Whitehead} C. to By. {R.W. Bailey - Chief Engineer} Wd {Mr Wood / Mr Whitehead} 9/NJ7.12.23. 40/50 H.P. Chassis. Order 23394 - Laminated Road Springs. I return herewith back copy of this order, which I took with me to Thos. Firth & Sons Ltd. yesterday. I have noted thereon in pencil the promises of delivery which Firths gave to me. Please note that all the springs of this order are being made "high nip", which is the term used by Firths to describe the greater space which exists between the leaves of Woodheads springs as compared with theirs (Firths) before being nipped up by the centre bolt. In this connection, Firths reminded me that they had supplied to us a pair of springs or a set of springs (I do not quite know which) with "high nip" for experimental purposes and for comparison with Woodheads springs, but we had not yet furnished a report thereon and they (Firths) are very anxious to have said report. Wd. {Mr Wood / Mr Whitehead} | ||