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).
Confirming details on the power output and specifications of an E.R.A. 2-litre engine.
| Identifier | ExFiles\Box 90\4\ scan0171 | |
| Date | 11th May 1938 | |
| 266.S To Lr.{Mr Ellor} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}6/MH.{M. Huckerby}11.5.38. E.R.A. POWER OUTPUT. Confirming what we told you on the telephone, the information as supplied by Berthon about their 2 litre engine is that it gave 384 BMEP at 6,000 revs. with 30 lbs. boost. They use 14 mm. Bosch 480.G.4 plugs screwed direct into the aluminium head. They say the 500.G.4 plug will stand even more heat. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||