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 modifications for the Spectre Type Fuel Pump to align with changes made by the S.U. Co.
| Identifier | ExFiles\Box 149\1\ scan0145 | |
| Date | 7th June 1935 | |
| To By.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} 41263 Hs{Lord Ernest Hives - Chair}/Bwg.{J. C. Bowring}6/KW.7.6.35. SpectreCodename for Phantom III Type Fuel Pump. In order that our drawing No. D.74508 may be brought into line with their own, the S.U. Co. have notified us of slight modifications which they carried out at the commencement of production. These modifications, which we give below, are mainly to obtain the required output and have proved satisfactory on the Exptl. SpectreCodename for Phantom III cars up to date. (1) .1875" by-pass holes opened up to .250". (2) Inside dia. of tubes increased from .3125 to .3346". (3) Valve cage is opened up from .3125 to .3437". (4) There are four outlet holes in the valve cages of .250" insteadof .1875". (5) Valve cage plug is .375" instead of .317". (6) Bakelite valves are used, valve spring being deleted. The valve cage alum. locating washer is also deleted. The electrical units remain the same as per standard Bentley. Hs{Lord Ernest Hives - Chair}/J.Bowering. | ||