I need a comparison between alpha and gamma stirling engine

[Daniel]

I need a comparison between alpha and gamma stirling engine in:
efficiency
noise
power-volume ratio
losses
every things
>>>

[staska]

Gamma works with less efficent drive system. Alpha have to be built using ross yoke or be twin action - 4 cylinder to be efficient.

[Daniel]

twin action like this

[Daniel]

and if i apply ross yoke what is the the value phase angle α ?

[staska]

For ross yoke you got 90 phase angle.

[Daniel]

thank you

[staska]

But - 90 degree in alpha stirling is not equal to 90 in gamma :)