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).
Proposed production specification for the Valves and Fittings section for the Bensport J.I. chassis.
| Identifier | ExFiles\Box 88\4\ scan0007 | |
| Date | 10th February 1933 | |
| Hs.{Lord Ernest Hives - Chair} X254 BY/SS.{S. Smith}1/N.10.2.33. Bensport J.I. - Valves and Fittings. --------------------------------- We give below the proposed production specification of the Valves & Fittings section for the Bensport J.I. chassis. Will Hs.{Lord Ernest Hives - Chair} please say if the exhaust valve with the stiffened head should be instructed, and advise us of any corrections he wishes to make. In the meantime will 'E' Dept. please go ahead and prepare the new drawings and L.O.P. ready for production instructions. BENSPORT. VALVES & FITTING. SPECIFICATION. | Detail. | Fitted to Unit. | Proposed for Production. | |---|---|---| | Cylinder Head. | E.59311 mod. to Hs.{Lord Ernest Hives - Chair} 907. Floor raised .090 to reduce volume of combustion chamber. Inlet valve clearance space trepanned. Overall height reduced from 4.350 to 4.260. Both valve guides .525 1 in 20 taper. | Pattern & Cores to be permanently modified. Inlet Valve .525-1 in 20. Exh. " .550 -1 " 48 as LeC.3296. | | Valve Guides. | Ex.8156 for both valves. | Inlet. EB.111) Exhaust EB.112) LeC.3296. | | Valves. | Inlet Ex.7643 which is .100 longer than E.56851 Exhaust Ex.7642 which is .100 longer than E.56852. | New drawing as fitted. Check length. New drawing as fitted or thicker head? E.59345. hs{Lord Ernest Hives - Chair} | )Cont'd.{John DeLooze - Company Secretary} | ||