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).
Graph plotting brake horsepower and percentage power loss against engine RPM for a Super Sports Engine with and without an exhaust manifold.
| Identifier | ExFiles\Box 92\2\ scan0048 | |
| Date | 26th October 1928 | |
| POWER LOSS TO EXHAUST MANIFOLD. SUPER SPORTS ENGINE. ENGINE N.o SS.{S. Smith}3. STD. "PHANTOM" CARBURETTOR. OPEN EXHAUST PORTS. EXHAUST MANIFOLD TO L.E.C. 2518. PERCENTAGE LOSS TO MANIFOLD. BRAKE HORSE POWER. R.P.M. OF ENGINE. PERCENTAGE LOSS OF POWER. V470. 26-10-28 | ||