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).
Specifications for a Side Valve Engine including valve gear weights, loads, timing, and performance data.
| Identifier | ExFiles\Box 158\4\ scan0277 | |
| Date | 13th December 1938 guessed | |
| SIDE VALVE ENGINE. VALVE GEAR WEIGHTS. Lbs. (A) Valve ................. .2277 (B) Spring .................. .1304 (C) Retaining Washer & Wedges .0656 x (D) Tappet .................. .2321 (E) Adjusting Screw ........... .0253 (F) Lock Nut for Adj. Screw ... .0078 x Hollow cast iron Tappet - No allowance for hydraulic plunger, etc. SPRING LOADS. lbs. Valve Seated 46 Full Lift (.375) 108 VALVE TIMING @ .020 CLEARANCE. Inlet Opens T.D.C. " Closes 51° After B.D.C. Exhaust Opens 51° Before B.D.C. " Closes T.D.C. ACCELERATIONS AND VELOCITIES. Max. Positive Acceleration .0011 Ins/Deg² " Velocity .0094 " " Negative Acceleration .0003164 " ² MAXIMUM SPEED 4250 R.P.M. | ||