Design modifications for the 'Buzzard' and 'Vulture' bonnet models and the rear engine foot bracket.
| Identifier | ExFiles\Box 33\2\ Scan035 | |
| Date | 16th May 1920 | |
| To Hn. {F. C. Honeyman - Retail orders} Dn. from E. {Mr Elliott - Chief Engineer} Ry. Copy to CJ. Wox. Mn. EFC. {E. Fowler Clarke - Electrical Engineer} E1/G16.5.20. RE VISIT OF MESSRS. HIVES, DAY, AND BAILEY, TO WEST WITTERING(Henry Royce's home town) 15 MAY, 1920. 40/50 H.P. CHASSIS. X.3822. X.3882. X.3821. X.3861. Bonnet Models.- Models of the "Buzzard(Aero Engine)", "Vulture(Experimental 6 CYL OHV LONG STROKE / Aero Engine)", and 40/50 H.P. bonnets were inspected. It was seen that the scuttle for the "Buzzard(Aero Engine)" and "Vulture(Experimental 6 CYL OHV LONG STROKE / Aero Engine)" has been wrongly made flat on top instead of to a slope agreeing with the top hinge of the bonnet. This had the effect of creating a hump in the top line and excessive slope in the bonnet, more pronounced in the case of the "Buzzard(Aero Engine)". Mr. Royce was satisfied with the appearance of the "Vulture(Experimental 6 CYL OHV LONG STROKE / Aero Engine)" but he desired the top of the "Buzzard(Aero Engine)" radiator to be raised 1". As regards the "Buzzard(Aero Engine)" scuttle, Mr. Royce's final decision is not to alter the present height shown for the instrument board so that the slope of the line from the top of this board to the radiator will be reduced. The "Buzzard(Aero Engine)" radiator will be larger than the "Vulture(Experimental 6 CYL OHV LONG STROKE / Aero Engine)" by these alterations, which is quite in accordance with the cooling requirements of the respective engines. The painted aluminium line representing the bottom tanks of the radiators on the models should be removed. Further drawings will be sent from Wittering dealing with the alterations to these models. REAR ENGINE FOOT BRACKET (40/50 H.P. CHASSIS). X.3431. E.4062. A specimen of the cast steel rear engine foot brackets that we are at present using on production cars in Derby was exhibited, together with alternate proposals for making the foot as a drop forging. Mr. Royce remarked, "could Mr. Hives test a foot in aluminium of the present design on the bumping rig with a view to obtaining information"? Mr. Royce suggested a tubular construction of foot which was an improvement on a tubular design submitted by Mr. Day. The following sketch illustrates the suggestion, and shows how a forging made up of a tubular socket with a flange not at right angles to its axle, so as to suit the slope of the frame, is joined by a piece of tube to a forging of "I" section which provides a suitable face, and bolt boss for carrying the crankcase foot. | ||
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).