[Leo Fernekes] has fallen down the Stirling engine rabbit hollow. We mustn’t pass judgement on — such things as this occur in the most productive of households, in spite of everything. And once they do occur to any person like [Leo], issues can get fascinating mighty briefly.
His present video, connected beneath, if truth be told has treasured little to do together with his newfound Stirling engine dependancy according to se. However while you construct a Stirling engine, and also you’re of a quantitative bent, having some method to measure its energy output can be at hand. That’s a role for a dynamometer, which [Leo] units out to construct in grand style. Dynos want to measure the torque and rotational pace of an engine whilst various the weight on it, and this one does it with taste.
[Leo]’s torque transducer is totally DIY, consisting of hand-wound coils at the ends of a protracted lever arm that’s connected to the output shaft of the engine below check via a magnetic coupling. The coils are unfastened to transport inside of a powerful magnetic box, with a PID loop controlling the present within the coils. Comments at the arm’s place is equipped via an optical sensor, additionally DIY, making the present important to stay the arm desk bound proportional to the enter torque. The video is going into nice element and has numerous design and construct guidelines.
We simply love the entire vibe of this construct. There will have been more effective or faster techniques to move about it, however [Leo] were given this performed with what he had available for a fragment of what purchasing in off-the-shelf portions would have value. And the entire thing used to be a super studying revel in, each for him and for us. It kind of reminds us of (*3*)a dyno that [Jeremy Fielding] constructed some time again, albeit on a far other scale.