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).
Comparison of bonnet top hinge slopes between vehicle models B.2 and B.5, with proposed adjustments.
| Identifier | ExFiles\Box 98\3\ scan0149 | |
| Date | 10th February 1939 | |
| To Rm.{William Robotham - Chief Engineer}.. from Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. Da.{Bernard Day - Chassis Design} Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} 405 Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}7/N.10.2.39. B.5. Bonnet Top Hinge Slope. We agree that apart from any inaccuracy in the mounting of the body and the fit of the bonnet and radiator there is more slope on the B.5. top hinge than on the B.2. The slope of each hinge is approximately the same relative to the level top of frame e.g. B.2. = 1° - 33' B.5. = 1° - 39' The level top of frame of both cars under full load was the same relative to the road, and sloped to the rear e.g. B.2. 27' B.5. 31' thus giving the bonnet hinge slopes relative to the ground of: B.2. = 1° - 6' B.5. = 1° - 8' However the rear of the B.5. car was raised .834 subsequently, giving the top hinge slopes relative to the ground of: B.2. = 1° - 6' B.5. = 1° - 28' To put the bonnet top hinge slope back to that of B.2. it would be necessary to raise the radiator .318". The equivalent appearance can be obtained by raising the whole front of the car approx. .800 by jacking. Ev.{Ivan Evernden - coachwork} | ||