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).
List of modifications and their design positions for the Kestrel and Merlin 'F' engines.
| Identifier | ExFiles\Box 161a\4\ scan0082 | |
| Date | 4th June 1936 | |
| ITEM. (sheet 6) DESIGN POSITION. KESTREL ENGINE. Mod. to adaptation of Schwarz blades to R.R.Hele Shaw hub. In hand. " R.R.Hele Shaw airscrew hub to facilitate machining. Completed 15.5.36. Mod. to Hobson Automatic mixture control. " 25.5.36. Gits oil seal for R.R. Heleshaw oil glands - replacement scheme for present metal glands. " 28.5.36. MERLIN "F" ENGINE. Supercharger rear gear housing with increased radii. Completed 16.5.36. Adaptation of oil relief valve to suit Hamilton Constant speed unit operation. In hand. Clearance of carburetter in Fairey Battle framework. " 4.6.36. Pipe system for Hamilton constant speed unit. In hand. Rig for measuring end thrust on supercharger rotor. Completed 12.5.36. Cast conduits for ignition screening. Completed. Hardened oil pump spindles. " Investigation of exhaust port areas. " Driver for Frazer-Nash gun turret pump. In hand. Mod. to magneto levers to suit B.T.H. C.I.S.E."Q" type magneto. Completed 12.5.36. Mod. to slipper gear pegs - increased diameter of pegs to prevent shear. " 18.5.36. Mod. to exhaust ports - increased cooling and increased port area. Completed. | ||