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).
Experimental arrangement with alternating plugs in two exhaust manifolds to keep a specific spot hot.
| Identifier | WestWitteringFiles\F\February1921\ Scan49 | |
| Date | 1st February 1921 | |
| To OY. & HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} -2- R7/G16/2/21 Contd. The value of this arrangement can only be ascertained by experiment. It seems, however, possible that it will be more effective than it would appear at first sight, the plugs in the two exhaust manifolds being alternating. I think that the gases would be circulating quite vigorously round the spot which it is desired to keep hot. R.{Sir Henry Royce} | ||