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).
Test report on 12 1/2% stiffer front springs for a 98-NK car, noting component failures and unsatisfactory results.
| Identifier | Morton\M20.3\ img048 | |
| Date | 25th September 1924 | |
| SHEET 11. Test No.1X. FIRTHS 12 1/2% STIFFER FRONT SPRINGS - 98-NK CAR. Only troubles consisted of :- Frame side members cracked where NR. spare) wheel carriers are fitted. N.S. front spring rear suspension bracket very slightly cracked. These springs were discarded having been found unsatisfactory on the Derby Bump Test. MILEAGE OF TEST 2,120 - AVERAGE SPEED 37.2 M.P.H. REF: Expt. No. EXPERIMENTAL REPORT R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. | ||