In essence Gryphon is two single engines arranged right and left handed, each with its own separate valve gear but driving a common crank shaft. Hence the term "Double".
In full size practice this simple arrangement with readily accessible working parts offered flexibility both in terms of maintenance and running as depending on the load to be driven, one side could be shut down to improve steam economy or to enable servicing on the side at rest. Gryphon is available in pre-painted kit form, being supplied in red, green or blue. Operation on either steam or compressed air at around 10 -15psi being typical. As with all Heritage machined kit engines, each model is individually numbered, issued with a certificate of authenticity and provided with all the tools required for assembly.
Whilst Gryphon makes a very fine static display, the twin 19mm bore x 25mm stroke cylinders enable the engine to become a real "work horse" and is particularly effective when set up as part of a working steam plant.
Details include a six spoked flywheel with recessed painted rim, separate steel accessory drive pulley and oil cup lubrication to the trunk guides. The twin cylinder configuration enables smooth slow running so characteristic of the full size "Tangye" engines and provides easy starting. Steam is admitted to and from the cylinders via slide valves each being driven by eccentrics mounted on the crank shaft which is itself supported in four substantial main bearings. The centrally positioned flywheel runs through the cast bed plate and into a recess in the hardwood plynth. Cast brass name plate and copper Heritage oval carrying the engines unique number further enhance this fine model.
If considering operation on steam, our " 7V" series boilers are to be recommended.
See also; Factory Finished option.
Type; Horizontal Engine
Bore; 3/4" (19mm)
Stroke; 1" (25mm)
F/wheel dia; 4 " (101mm)
Valve type; Slide
Height; 4 1/2" (114mm)
Length; 8" (203mm)
Width; 7 1/2" (190mm)
Connections; 3/16" x 40 M.E.
Pipework; 5/32" (4mm) O.D.
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