A weird thermal lag engine/ heat pump

Hi folks,

BLADE is here again, because I made a small fast little thermal lag engine
to test my glass piston.
The little engine worked well, it riched the 50 Hz easily with the correct tension of a rubber rope.
If you want to check my video about this engine:

But today I thought about a heat pump with high frequency.
I wanted to see how cool down the end of this little engine.
The engine started to cool down, but not on the closed end
that's weird!

The engine hot side isn't changed as every normal heat engine if we mechanically drive them.
I've tried to drive it 1-50Hz but thte result was same.

The question is, how could I change the hot side to the cold side on my little heat pump?


Thanks any help!
BLADE

Perfect piston for your homemade Stirling engines

 Hi folks,

I've got lot's of questions about heat engine's power piston. 
I have a playlist with lots of different Stirling piston DIY tutorial video,
 what I built in the last few years on youtube:

So, I've made different type of pistons for Stirling engines, 
but I never made a perfect glass piston for you.

But today I'll show you my new video with lots of easy steps
pictures and instructions.
 How to make a perfect low friction
also beautiful, easy to use power piston
for your desktop DIY, Homemade Stirling engines?

Check it out!


See You Soon!

BLADE