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).
Record card detailing a heat test conducted on chassis 774.
| Identifier | ExFiles\Box 78\3\ scan0001 | |
| Date | 2nd October 1908 | |
| Heat Test. Chassis 774. air 18 Engine running 600 revs. Temperature underneath footboards. Temperature of water Special radiator, No gills windows closed. Engine running 2 hours. 64° C. 203° F.{Mr Friese} (95 C) Engine running third hour with windows open. 66° C. 206° F.{Mr Friese} Ordinary radiator. 1 hours running windows closed. 81° C. 196° F.{Mr Friese} (91 C) 1 hour windows open. 78° C. 184° F.{Mr Friese} | ||