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).
Test report on radiator and bonnet movement, noting panel displacement at 60 MPH.
| Identifier | ExFiles\Box 11\3\ 03-page377 | |
| Date | 1st July 1931 guessed | |
| (3) slow, no sharp period. 4th. Rubber blocks removed controlling radiator and springs fitted. 45 lbs load. 60 MPH. The end movement of the bonnet was more rapid, amplitude of movement no greater. The radiator movement was slow, but increased 10% than previous test. ---------------- We have observed during these tests when travelling at 60 MPH with the bonnet shutters closed, the side panels of the bonnet are forced outwards at the bottom .500" by the air pressure. With the shutters open they are still forced open approx. .125". It indicates that more clearance is needed at the rear of the engine, also improved bonnet catches as we have previously stated. G.W.H. G.W.Hancock. | ||