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).
Design position report detailing the status of research and development for P.V.XII, Kestrel, and Merlin 'B' engines.
| Identifier | ExFiles\Box 30\3\ Scan141 | |
| Date | 18th March 1935 guessed | |
| (8) ITEM. DESIGN POSITION. SINGLE CYLINDER AND GENERAL RESEARCH. P.V.XII single cylinder unit:- Modification to ramp head Completed. with inlet sparking plug. Aero universal single cylinder unit - Merlin "D" head Completed. modified to take 14 mm. spark plugs. Investigation of engine roughness due to combustion chamber In hand. shape. KESTREL ENGINE. R.R. Variable pitch airscrew hub. In hand. MERLIN "B" ENGINE. Mod. to ramp cylinder head - sparking plug on inlet side. In hand. " " coolant circulation system. In hand. Stiffened crankcase (integral construction). Completed. Divided crankcase and cylinder jackets. In hand. Cylinder head mods. to suit divided crankcase and cylinder In hand. jacket construction. Application of needle roller bearings in supercharger drive. Completed. Roller bearing for increased centres layshaft supercharger drive.Completed. | ||