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From 1759 it was many licences for this kind of engines : WOOD, CAYLEY
Réverend Robert STIRLING, in 1816, write a licence ; this licence
include so many innovations, everybody consider 1816 as the
birthday of hot air engines.
Up to WW1 a big quantity of engines were build.
The invention of IC engine as gaz engine anf diesel engine start the
declin of Stirling engines.
Between 1936 and 1975 PHILIPS made a lot of studies and sold
licence to company as, Ford, GM, MAN etc..
Today moderns STIRLING engines have an efficiency around 42 %.
How it work?
Consider a close pipe, the close end is heated, and the other end is
In this cylinder it is a "Displacer" like a piston witch allow
to let air around it.
Below this displacer, it is a piston well adjust on the cylinder and on
the displacer rod.
ce déplaceur se trouve un piston de travail ajusté dans le cylindre et
sur la tige du déplaceur.
At the beginning displacer is in upper position, the piston in lowest
1 to 2 Compression. Piston go up and increase the air pressure.
2 to 3 Heating.
Displacer go down, pushing air in hot room, air get more pression.
3 to 4 Power période.The pressure push the oiston and give power.
4 to1 Cooling.
Displacer go up, go down in the cold room.
The outside combustion is better as an internal combustion.
It is no exhaust gaz, all air stay inside, means no exhaust noise.
STIRLING engine need only heat, regardless the origine of heat : gaz,
gazoline, gazoil, wood, straw etc .. and SUN
Stirling engines to day
It is some applications for modernes STIRLING engines : space, submarines,
sawmill in the North.
For the modeller
This kind of engine is very interseting and quit mystérious.
I build around 100 engines in 75 différents types.
If you need more informations please send me a E-mail :
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