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).
List of part modifications and improvements for shock dampers, instrument boards, batteries, horns, and wiring.
| Identifier | ExFiles\Box 169\1\ img016 | |
| Date | 13th June 1929 | |
| (4) RHC{R. H. Coverley - Production Engineer}/FW4/MS13.6.29. Rear Hyd: Shock Damper - L.O.P. F.79925 - N.S.2800-2. (1) Strengthened type Damper Casings to N.S.2800-2. (2) Dynamic restriction parts fitted. (3) 50% stronger Valve Springs F.80991-5-6. H.P. 80 lbs. L.P. 60 lbs. Front Axle Control Damper - L.O.P. F.79507-N.S.2794-5-2817. (1) Strengthened type Damper Casings to N.S.2794-5. (2) Improved Ball Pin Lubrication to N.S.2817. (3) 50% Stronger Valve Springs F.80992-3-4. (4) Dynamic Restriction parts fitted. H.P. 80 lbs. L.P. 60 lbs. Anchorage for F.A.C. Damper - L.O.P. F.79517-N.S.2817. Improved Ball Pin Lubrication to N.S.2817. Instrument Board - L.O.P. F.79902. Grouped type Instruments. Battery in Frame - L.O.P. F.80778. Revised Battery Suspension to suit Tubular type Crossmembers. Horn & Fittings - L.O.P. F.79807 - LeC 2637. New Klaxon Horn Bracket F.80372-6-F.80380 to LeC 2637. Wiring & Fittings - L.O.P. F.79601. (1) Dashboard Fittings & casing to L.F.1248. (2) Accessibility of Shock Damper Valves & to clear Tubular Crossmembers to L.F.1276. Conti. | ||