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).
Report detailing tests on radiator and bonnet mountings, including material changes and performance outcomes.
| Identifier | ExFiles\Box 119\2\ scan0346 | |
| Date | 6th June 1930 guessed | |
| IV radiator horizontally or sideways, quite unsuitable. as the rubber had worn down to the steel after 10 minutes running. We therefore replaced the rubbers by ferodo which was a great improvement. we have since fitted up a scheme as fig V which has run for 37 hours. In this condition the vertical movement of the radiator is slightly increased from test II. The horizontal or sideway movement of the radiator relative to the frame is practically nothing. The bonnet knocks at rear are very- slightly more definite than in Test II. We find more load put on the radiator control spring the greater the tendency for the bonnet to knock at the rear. Whilst locating the radiator from the radiator cross-member we have broken 3 of the .250" dian studs which hold our ferodo locations. The average life is about 23 hours. Fig VI shows how these studs have been strengthened. Test IV. The primary object of these tests being to eliminate bonnet knocks on the dash. we fitted Scheme 1517. By using harder rubber than that originally supplied and giving .025 clearance between the rubber and bonnet we have been able to forget about bonnet knocks. This Scheme has done 62 hours running and appears does not cause any difficulty to open or close the bonnet. As this scheme relies on the bonnet stiffeners for its success, and owing to the present effort being made to use rivetless bonnets, we are trying | ||