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Hi Tom,

Yes, your idea that making various displacers of different materials can help to judge if the heat trassfer speed is the key factor that the displacer will moving after the piston.

Hi Tom, As you know, any displacer will not work as a piston, so I think it will not be the difference of pressure between up and down. And from the former video when the user press the piston manually, you can see there is a delay between the piston and displacer moving. So I think the movement is ...

Hi Tom, I do not think the displacer changing respond to the pressure. when the power piston is pressed down, the pressure in the volume should rise up. If displacer is isolated with volume(both pressure and temperature), its interal pressure remain and it should be compressed, so it should lift up....

Hi Tom,

Yes you are right, it is a displacer.
And here is a video of transparent verion of nasa's stierling:
https://youtu.be/dOSGpzGhrJQ

Hi, BTW, can anyone explain why the NASA's stirling free displacer will run after the piston? I guess when the piston compress the gas, it will cause temperature rise, then the gas inside the displacer will expand, and vice versa. If so, the system's working frequency is limited by the heat transfer...

hi,

I think this stirling by NASA is a "Elastic Regenerator".
https://www.youtube.com/watch?v=SJsuwIUb0wE&t=314s

Hi Tom, We know there are one input(in the river) and one output(in the field) of the water. So if the vacuum can cause the water in the river to fill in the tank, why it will not cause the water stop going out in the output port? Maybe they use some one direction valve, but it will stop water go ba...

I suppose this is something for this thread https://youtu.be/mkIF01ieT_c https://i.ibb.co/Pzy6LWc/Untitled.jpg Hi airpower, do you know how it works? I have see many videos they created, but no explanation about the mechanism. So I think it is fake, or so many dams around the world are all joke. Th...

Yes, I agree with you. "Thermoacoustic" is amazing but I cannot find any high-power stirling take use of its structure. Maybe the internal air movement is complicated when the machine become larger. I'm happy to see some geniuses come up with innovative solutions to improve the thermoacous...

Hi, Maybe the "surface to volume ratio" is a factor which will impact the efficiency of the machine, but I think it is not the important one. Since the machine is not working like the sun or coal. It absorb heat and transfer to force, then it release the heat. So volume determine how much ...

Hi, I am more interesting on your idea because I have ever thought the same one, that one heater with two power pistons working in the cold cylinders. But do you notice the reply by Tom Booth that at the below time "by Tom Booth » Mon Dec 06, 2021 10:05 am" The video attached there shows t...