alpha engine question

Discussion on Stirling or "hot air" engines (all types)
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Wellington
Posts: 143
Joined: Mon Apr 18, 2016 4:02 am

alpha engine question

Post by Wellington » Wed Jan 24, 2018 9:27 am

Im currerntly building my first engine. Its a horizontal unpresurised mini alpha engine. How should i ofsett the crankshaft? does the displacer piston go 90 degrees ahead of the power piston? Thanks
Wellington.

cbstirling2
Posts: 146
Joined: Sat Dec 17, 2016 9:35 pm

Re: alpha engine question

Post by cbstirling2 » Wed Jan 24, 2018 10:10 am

Well with alpha, both pistons and cylinders can be identical on same crank pin 90 apart.
Displacer is misnomer here. Either hot or cold piston.
CBStirling2

Wellington
Posts: 143
Joined: Mon Apr 18, 2016 4:02 am

Re: alpha engine question

Post by Wellington » Wed Jan 24, 2018 1:14 pm

cbstirling2 wrote:Well with alpha, both pistons and cylinders can be identical on same crank pin 90 apart.
Displacer is misnomer here. Either hot or cold piston.
]#


Its a horizontal engine that looks like a gamma so no right angle to put on same pin. Im trying to copy this engine:



regards
Wellington

Ian S C
Posts: 2154
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: alpha engine question

Post by Ian S C » Fri Jan 26, 2018 3:35 am

You can actually run a parallel GAMMA on a single crank pin by running the displacer via a bell crank, and an ALPHA could be run the same way. On this motor the bell crank ratio is 1.5 : 1, for an ALPHA motor the ratio would be 1 : 1
Ian S C
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