Table detailing exhaust system tests, comparing power output (B.HP) and power loss for various systems relative to a standard system.
| Identifier | ExFiles\Box 38\4\ Scan066 | |
| Date | 5th April 1924 guessed | |
| (2) EXHAUST SYSTEM TESTS - POWER OUTPUT OF STD. SYSTEM AND LOSS IN B.H.P. OF THE OTHER SYSTEMS RELATIVE TO STANDARD SYSTEM. | R.P.M. | B.H.P. with std. exh. system. | Loss in B.H.P. relative to std. system. | |---|---|---| | | closed. | open | West Wittering(Henry Royce's home town) 2 1/4" dia. down pipe | West Wittering(Henry Royce's home town) 2" dia. down pipe. | Derby exhaust scheme. | Closed and open refer to the cut-out. | | | | | closed. | open. | closed. | open. | closed. | open. | | 1000 | 48.8 | 50.6 | --- | 0.3 | --- | .9 | 0.6 | 0.7 | | 1250 | 60.0 | 62.3 | .6 | 1.1 | .6 | .9 | 0.5 | 0.6 | | 1500 | 68.8 | 72.5 | 1.2 | 1.8 | 1.2 | 1.8 | 0.7 | 0.9 | | 1750 | 74.4 | 80.3 | 1.4 | 2.8 | 1.4 | 2.0 | 1.0 | 1.6 | | 2000 | 78.25 | 85.7 | 1.7 | 3.3 | 1.25 | 2.0 | 1.1 | 1.5 | | 2250 | 78.8 | 87.2 | 1.4 | 3.2 | 0.5 | 2.2 | 1.5 | 1.4 | | ||
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).