Myford
main view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale side view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale
top view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale bottom view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale
wheel view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale head view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale
ignition view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale condensor view Mastiff ic gas petrol engine by L.C.Mason horizontally apposed 4 cylinder hemmingway for sale

 

Mastiff IC gas/petrol engine, designed by L C Mason for sale. Horizontally opposed 4 cylinder, 4 stroke. Information on the Hemmingway website. A rare and very interesting engine.

These do not come up for sale very often. This one will need setting up along with a carb etc.

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INFO TAKEN FROM THE HEMMINGWAY WEBSITE

Much like Westbury, Leonard Charlish Mason (always "Len") was a polymath with a large variety of interests and disciplines. Following his ever popular design for Minnie, the steam traction engine, he turned his hand to petrol engines. The Mastiff is a genuine triumph of design. Mason has bought together a number of creative, trend-setting features within a compact engine which is in fact not difficult to build. Almost every aspect of the engine has been considered from first principles rather than by following convention.

Known as a great starter and a silky smooth runner, the Mastiff is a compact unit with a particularly low centre of gravity. The horizontally opposed layout provides a low head height, great balance and a stiff crankcase and crankshaft. With a Bore x Stroke of Ø3/4" x 7/8" the 4 cylinder Mastiff has a swept capacity of 25cc. The side valve arrangement helps to reduce complexity whilst providing ample breathing through Ø5/16" valves. Mason's camshaft arrangement has considerable merit for the constructor. Loose silver steel inlet and exhaust cams are hardened separately then fixed with Loctite to a mild steel shaft using an assembly jig to ensure perfect orientation.

A vertical shaft for auxiliaries (driven by 2:1 skew gears) is used to power the distributor and oil pump. A pressure relief valve and an external oil pressure indicator are incorporated to ensure good lubrication from the shallow sump. The engine can be built with either a single horizontal or twin downdraught carburettors and the manifold arrangement is neatly achieved without tortuous routing. As the engine was conceived for marine use, water cooling is by thermo-syphon.

The Mastiff stands 6 ½" tall, 8 ¾" long and 7 ½" wide over its ¼" x 32tpi plugs. Interestingly, the hole spacing for the mounting bearers is an exact match for the Myford cross-slide, making running-in a simple affair.

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Price:  £ 1,680 (No additional VAT to add)

Happy to consider a loco, traction, or stationary/marine/aero engines as a part exchange.

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Call Howard on 01225 812155 or 07753 610420
Alternatively email:   sales@myford-lathes.com

 


 

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1 Nethermore   Neston   Corsham   Wiltshire
SN13 9XT
Tel: 01225 812155

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