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).
Exhaust valve failure during an endurance test on a Phantom II, Unit 25.
| Identifier | ExFiles\Box 17\6\ Scan113 | |
| Date | 27th May 1932 | |
| FILES. X7060. PHANTOM II. VALVES. P.II. Unit 25. X2901 E.83095. Exhaust Valve (Dome Head) Comp. Ratio 5.25 : 1 Camshaft W.W. (1140) E.82448 Std. induction system. Valve springs Hs.{Lord Ernest Hives - Chair}659. Valve lift .470 Exhaust valve collapsed in No.5 cylinder after 11 mins. endurance at 3500 r.p.m. These valves were fitted on 27.5.32. and have been run continuously since that date at speeds up to 3500 r.p.m. Total running time approx. 9 hrs. Valve springs. Hs.{Lord Ernest Hives - Chair}659 Outer spring. Free length 3.020" Length valve closed 2.000 load 73 lbs. " " open 1.520 " 108 lbs. E.82952 Inner spring. Free length 2.260" Length valve closed 1.750 load 20 lbs. " " open 1.280 " 40.5 lbs. Total loading. Valve closed 93 lbs. open 148 lbs. With outer springs. E.82953. Free length 2.800 Total loading "with E.82952 inner spring. 87 lbs (valve closed) C.J.Salt. | ||