This is our first Stirling engine with gears. Part of the nano engine family, rather than having a crank or ross yoke arrangement to connect the pistons this engine has gears. Using gears provides some interesting advantages. Firstly it allows the con-rods to remain fairly parallel which in turn reduces friction. The gears also act as a second flywheel smoothing the running of the engine. Gamma Stirling engines are naturally unbalanced as they have 2 different sized pistons that are not in phase. Adding two relatively large masses (the gears) as a dead weight has improved the vibration characteristics.

Overall this engine is compact, blisteringly fast with an interesting gear arrangement.

As with all the nano range it comes with a special burner, you just light the burner, let the engine heat up and then give the flywheel a small flick to start. The engine has borosilicate glass cylinders which can withstand high temperatures enabling you to glimpse inside the engine.

A low-friction graphite piston was utilised which is self-lubricating and requires no maintenance. A brass heat sink disperses heat from the cold side, while the rest of the engine is made from anodized aluminium.

This beautiful engine will run at over 2000 rpm on a tiny methylated spirit flame.

Design features:

Engine size	83mm x 50mm x 115mm (3.2in x 1.9in x 4.5in)
RPM	1600 - 2000rpm
Weight	126g / 0.27 lb
Piston Diameter	9.5mm
Engine type	Gamma engine
Stroke length	9 mm
Crank Design	Gear mechanism
Working temperature	About 200C / 390F
Bearings	Precision miniature ball race bearings
Materials	Mainly glass, brass, stainless steel, aluminium
Finish	Brass, anodised grey aluminium
Fuel	Denatured alcohol (methylated spirits)
Assembly	Preassembled
Required tools	None
Manufacture	Almost all parts CNC machined
Testing	Each engine tested before dispatch
Designed & Made in	England