Engine Catalogue No. E140 - October 2012 126 Dunval Road, Bridgnorth, Shropshire WV16 4LZ, UK Tel/Fax: +44 (0)1746 767739 Email: [email protected] Website: www.hemingwaykits.com ABOUT US Hemingway Kits has been trading in the UK since 1976, providing small workshop owners with a growing range of Workshop Accessory kits to improve productivity, capacity and accuracy. We believe strongly in the importance of well researched and proven projects and are honoured to represent many of the world's most respected designers. It was these same beliefs that lead us to acquire Woking Precision Models in late 2006, providing a continuing source for the incomparable engine designs of Edgar Westbury, Laurence Sparey, G F King, Les Chenery, Eric Whittle, Colin Jones and Len Mason. We are proud to present the our range of classic model engines, developed for aero, marine, automotive, locomotive and stationary scale applications. The collection includes 15 internal combustion engines of virtually every layout, together with a growing variety of external combustion engines. We aim simply to provide the broadest and most refined range of Engines Kits available. EXTERNAL COMBUSTION ENGINES Developing and exploiting the Steam Engine lead to unimaginable wealth and change – not least in Great Britain! Like China today , from 1815 to 1870 Britain became the 'workshop of the world', producing finished good so efficiently and cheaply that it could obliterate competition in almost every other market. In these halcyon days the UK supplied over half the needs in manufactured goods of such nations as Germany, France, Belgium, and the United States! To our growing range of Steam Engines we are now pleased to add Benjamin Hick's “Crank Overhead” engine, a vertical installation which revolutionised mills and manufactories throughout the world in the 1850's. INTERNAL COMBUSTION ENGINES “Induction, Compression, Ignition, Exhaust” summarises the detailed development work of Nikolaus Otto, Gottlieb Daimler, Wilhelm Maybach, Karl Benz and Rudolf Diesel during the final decades of the 19th century. The world then changed! In all of its many guises, the Internal Combustion (IC) engine has been more influential in promoting the development of machine tools, precision measurement and metallurgy within the global industrial arena than any other product in the last 100 years. This is equally true of the effect that model engines have had and are having on model engineering practices. There can be no doubt that building a running IC engine requires patience, a methodical approach and precision. The crisp bark of one's first IC engine springing into life places it's constructor within an elite global group. We believe that it is the scale of this challenge that provides model engine builders with their unique satisfaction. The Hemingway IC Engine range contains a diverse array of designs: ! 2 strokes with single transfer or Schnüerle porting ! 4 stokes with side valves, push rod driven overhead valves or full overhead cam ! Spark, glow plug and compression ignition variants ! Singles and Twins plus 4 and 8 cylinder layouts ! In-line, V and horizontally opposed construction ! Displacements from 0.63cc to 40cc ! Air cooled and water cooled cylinders and heads ! Drip, splash and forced lubrication The commonality between the engines available from Hemingway Kits is that each has been exhaustively researched and refined into an elegant package that has been proven to work and proven to work well. As you read through the descriptions of each model, you'll get a flavour for which project appeals to you. Since Model ! Cylinder Liners: Continuously Cast Grade 250 Meehanite Grey Iron. Engineers are such resourceful individuals, it would be unwise of us to predict that any of the projects are beyond the capabilities of a novice. Never-the-less, for your first project we believe that it is particularly important for you to be ! Connecting Rods: Duraluminium Rod (2014 - HE 15). successful; one of the 2 strokes or side valve singles might prove to be a good starting point. As you progress and become comfortable with the processes and methods involved then of course the sky's the limit and each of the projects ! Pistons: FM Aluminium (6082 - HE30). provides a different set of challenges and satisfactions. ! Valve Guides and Bushes: Leaded Bronze (PB102). Many customers purchase plans and construction notes for 2 or 3 of the engines before settling on a choice; running through each build and visualising the set-ups required for their particular equipment. ! Valves: Stainless Steel (1.403). ! Camshafts, Gudgeon Pins and Push Rods: Silver Steel. WHAT'S IN A HEMINGWAY KIT? ! Carburettor Components: FM Brass (CZ121) in round square and hex sections. For each engine we have listed a description of the material kit. This kit provides the constructor with the vast majority ! of material required to complete the build in one sturdy box. We trust that customers will value this approach Contact Breaker Elements; Spring Steel (CS70 - EN42), Tuffnol, Nylon 66. compared with the more piecemeal availability offered in the past. In general, each kit will arrive with: ! Rocker Arms: EN3B steel. Castings ! Miscellaneous Steel items; FM Steel (EN1A). We have over 300 different foundry patterns and core boxes to support our engine range. Castings are hand poured into treated greensand, fettled then bead blasted to improve their appearance. A majority of the major components are poured in LM4 aluminium which can be machined at over 3 times the speed of steel, yielding an excellent surface Barstock included within a kit is colour-coded and an identification chart is provided. for gas and water-tight joints. Gunmetal castings are specified where a component has bearing surfaces and iron is used for such parts as flywheels. Other Materials Some of our pattern equipment was first commissioned before the Second World War and we are in the process of reconditioning and replacing patterns that have become unreliable. You may find that this creates a delay in the Ultimately, we intend that each material kit should be 100% complete. However, the kits are currently not exhaustive availability of certain castings. Whilst delays are always regrettable we hope you will appreciate the benefits of this and you will need to source a number of items including BA fasteners and any sheet materials. approach; there is nothing quite so frustrating as discovering an insurmountable defect after several hours work on a particular casting! Ignition Components It is our intention to offer castings for the engines in complete sets rather than as individual items. However, if you need to remake a component or if you are part way through an existing project, we will always be able to help. In this final section to the catalogue you will find everything required to run your engine, including coils, plugs, points and a proven Hall effect electronic ignition system. These items should be order separately – they are not included Gear Blanks within our material kits. 4 stroke engines are designed with a 2:1 gear train to drive the camshaft from the crankshaft. Additional gears are needed on some models to drive auxiliaries such as lubrication and coolant pumps. These gears are supplied with accurately hobbed teeth and concentric bores. In general you will need to open the bore to suit your installation and WHAT EQUIPMENT DO I NEED? add tapers, bosses and keyways as per drawings. Our customers' workshops vary considerably; from a flat belted 1920's lathe to a full CNC arsenal. At a minimum you Piston Rings will require a dependable centre lathe of at least 3½” centre height (7” swing) and 13” between centres. A screw Most of the engines are specified to run with cast iron piston rings and the correct number are supplied with each kit. cutting train is essential. In addition you will require some means of milling. Many of the set-ups described for the The rings are fully machined, “cracked” then spread on precise formers to be heat treated in a controlled furnace over earlier engines assume that the constructor will bore onto a faceplate and mill with a vertical slide. This is perfectly a 20 hour period. The compressed rings are produced 0.001” oversize allowing constructors to “gap” them to suit feasible and acceptable but what a difference you'll enjoy if you own a light vertical miller as well! their cylinder bores. Valve Springs Since precision is the “name of the game” for IC engines your measuring equipment is very important. You'll need an Valve springs are included for all 4 stroke engines. Oddly however, not all designers have specified an exact valve accurate surface plate, height gauge, a DTI resolving down to 0.00005 (1/2 of a tenth) and good quality micrometers spring… Westbury in particular seemed to assume that constructors would want to experiment with various wire and verniers. You should also consider investing is a Centering Microscope (see our Workshop Accessory range) to gauges and free lengths as they tuned their finished engines. We have researched requirements and commissioned a ensure that your accurate marking-out is translated into accurate machining! number of new springs that we believe will be suitable. If you find any problems with our choice please do let us know. The surface finishes and fits required between pistons and bores or valves and guides cannot be achieved with a cutting tool. You will need a means of lapping (or honing) internal and external cylindrical surfaces. We hope to release a Bearings number of Hemingway Workshop Accessory Kits to assist in this and other dedicated engine operations. If your chosen engine runs on ball races; you'll find these included in the material kit. Whilst a number of methods are offered by designers for the production of cams, you would be wise to invest in a Sawn Bar Stock trustworthy Dividing Head and Rotary Table.