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).
Performance graph for a Lagonda V12 engine with an air silencer fitted under specific backpressure conditions.
| Identifier | ExFiles\Box 170\1\ img015 | |
| Date | 28th November 1937 | |
| LAGONDA V12 ENGINE. 75 x 84.5 C.R. 7:1 CARBS. ROAD SETTING AIR SILENCER FITTED. BACK PRESSURE ON TEST BED 2LBS/IN² BACK PRESSURE ON CAR 5LBS/IN² MECHANICAL LOSSES (ZHF) R.P.M. 28. 11. 37 #2 | ||