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).
Machining modifications and performance testing for Spectre Integral Auto Lock Dampers.
| Identifier | ExFiles\Box 95\4\ scan0023 | |
| Date | 7th June 1935 | |
| HS{Lord Ernest Hives - Chair}/LCS FILE +342 7-6-35. SPECTRECodename for Phantom III INTEGRAL AUTO LOCK DAMPERS EX.17553 SCHEME. To facilitate machining HS.{Lord Ernest Hives - Chair}1921/2 sleeve and tube were substituted for Ex.17566/7/8 details, the determining relief and pressure areas being thus machined on the tube instead of in the bore of the sleeve. After testing various combinations of pressure and relief grooves a system was evolved whereby the damping pressure for a given valve spring load was 75% in excess of the pressure required to lock the valve. The attached graph illustrates this relationship, the tests being performed with the details at present fitted to 1S2 chassis. H.{Arthur M. Hanbury - Head Complaints} Bell | ||