Free piston Stirling Engine with linear alternator lights up incandescent bulb

This is basically the same model Stirling engine as in the previous video, but it has been made more rigid structurally and fitted with a linear alternator. The alternator has a Neodymium magnet 25 mm in diameter attached to the power piston of the Stirling and a coil fixed to a wooden armature. The coil is connected to an incandescent bulb (Christmas decoration type) which glows as the engine picks up speed.

Category:

Education

Tags:

• Stirling
• Engine
• hot
• air
• generator
• linear
• alternator
• lights
• incandescent
• bulb
• model

[kalaa216]

great job done.can you plz tell me the details how you made this engine.because i myself would really want to build this engine...

[blg53]

@kalaa216 Thanks. Unfortunately I don't have any drawings or anything like that because I built it by trial and error from bits of scrap, cans, glass cyringes, some tubing etc.. If you read my description on this and the previous videos as well as my answers to the previous comments that would be as much info as I can supply. remeber, you don't have to build an identical engine, do something similar, it is fun to just experiment. Good luck.

[yaochiuhqui]

@blg55 how did you calculate the springs constant, and where did u buy them?¿

Tnx very and congrats on the engine

[blg53]

@yaochiuhqui Thanks. I did not do any calculations. In fact, there are no springs there at all. In my commentary I referred to "virtual springs". They are formed by two sets of Neodymium magnets set to repel each other. I set the magnets by trial and error until both power piston and the displacer rod are "suspended" roughly half-way through their respective strokes before start of the engine.

[specallez]

I bet this would work great with a ferrofluid piston?

[blg53]

@specallez No, don't believe so. Ferrofluid is a liquid after all. It works great when there is no pressure to withstand as multiple example on youtube demonstrate. Unfortunately if it is asked to do a real job i.e. to overcome resistance it will not keep compression as the gas under pressure will simply bubble through a ferrofluid 'piston'..

[cellman64]

it is so succesful



[royalbrainwave]

Thank God for fast forward! This is one boring video making a big deal about nothing.

[eloid777]

@blg53 check your youtube account sent ua message

[blg53]

@eloid777 Sure, my Skype id is bob_berg