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).
Preliminary rating tests of the Goshawk I engine.
| Identifier | ExFiles\Box 179b\3\ img276 | |
| Date | 21th February 1933 | |
| ORIGINAL To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Yng. c. to Se. Wor.{Arthur Wormald - General Works Manager} c. to Rg.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} c. to Lr.{Mr Ellor} Lp.{Mr Lappin} Ha/Yng.1/MJ.21.2.33. x4658 PRELIMINARY RATING TESTS OF THE GOSHAWK 1 ENGINE. INTRODUCTION & OBJECT OF TESTS. This type superseded the Kestrel type engine and the following tests were run to establish :- (1) Rated altitude at which 600 BHP. at 2600 RPM. could be maintained and also to determine the Rated Boost Pressure. (2) Whether the engine could develop the Rated Boost Pressure at maximum permissible speed at an operational height of 15,000 ft., in order to comply with the requirements of the Day & Night Fighter Competition for optimum performance on aircraft trials. ABBREVIATED SPECIFICATION OF PRINCIPAL ENGINE COMPONENTS. Crankcase & Bearings to LOP.E.40169. - Main bearings R.R. lead bronze lined. Cylinder block end studs strengthened type provided with vibration collar. DES.1675-1704-5-18-26-33-37. Crankshaft to LOP.E.40043. - Shortened throw giving 5.35" stroke DRS.1743. Pistons to LOP.E.40262. - 6/1 Comp. ratio - High Duty Y alloy-strengthened type incorporating extra ring clearances. Connecting Rods to LOP.E.39857 - Articulated type. Big end bearing R.R. lead bronze-lined. Valve (Inlet Valves E.28651. - S/SLV.1932 Standard Kestrel. Assemblies. (Exhaust Valves E.38330- S/SLV. Sodium Filled. (Inner Valve Springs E.38324) (Outer Valve Springs E.38325) Large wire - High rate. Camshafts to LOP.E40042. - Harmonic deceleration. | ||