Stressed-Out Steorn

For what it’s worth, here are my thoughts on the current state of Steorn’s demo.

Anyone who has been an engineer, scientist, programmer, technician, or a practitioner of any art that involves prototyping, will understand what these guys are going through right now. It is easy to say now what they should have done to prepare for such an important event but it would be churlish and unproductive to do so.

We may be disappointed but that is nothing to the Steorn crew’s high-profile stress-out. I will wait until something happens that is worth commenting on before I do so. I keep my fingers crossed that that will be tomorrow when I see the working Orbo doing its thing in Kinetica. Until then, I simply wish them luck.

A Free Lunch From Steorn

Something bothered me about Steorn’s claims early in my research. It is one thing to say that you can make magnets do work and quite another to say that they will keep doing so without degradation for the life of the machine. If the permanent magnets degraded over time or simply demagnetised, then recharging them periodically would constitute fuel and the whole dream comes tumbling down.

I couldn’t understand how Steorn could make this claim. True, they’ve been playing around with this tech for a few years now, but as far as I know, they have not simply set one going and let it run for a year or two. Rather, they have been hunting for new and better ways to do the same thing, testing and retesting exhaustively, starting it off, measuring performances, torques and speed before stopping it, tweaking some aspect of the design and then running the tests again. Exhaustive, time-consuming and the stuff of good engineering design. But, if that’s true, how can they know that the magnets don’t demagnetise?

The answer lies in something Sean said in the Steorn public forum in November last year. Posting to the forum, he said that if a permanent magnet, initially magnetised to 80% of its capacity, was used in the device, then after some time in operation it would have increased its strength to 100%.

I’m not sure if the 100% figure refers to saturation or retentivity – probably the latter. Either way, it is an astonishing statement. Now we can understand their confidence. While nothing will beat a long field trial to prove the point, the knowledge that the magnetisation is topped up as it runs, is the key to the magic that is about to change our world. Where is the energy coming from? Why does a permanent magnet do that? These are questions that will excite scientists working on the subject in the coming years. Meanwhile the rest of us can hop on the ride happy in the knowledge that Steorn has confounded one more law:

There really is such a thing as a free lunch.