Haven’t posted anything for a while – longer than I realised it seems! Not that I haven’t been working in the shed, but sometimes I just need to get my head down and power through to make some progress.
The latest work that I have been doing is for the next issue of The Shed magazine – those deadline come around so quickly!
For a bit of a sneak peek, I am working on a water wheel – will end up being a garden feature, but I am trying to make it with some thought behind the design, and not just a basic layout. You may well ask, just how many ways can you actually make a water wheel, and the more I think about it, and the more research I do on the topic, the more surprised I become about the breadth of the topic.
I found a particularly interesting reference, quite the authority on the topic. It is The Engineer’s and Mechanic’s Encyclopædia: Comprehending Practical Illustrations of the Machinery and Processes Employed in Every Description of Manufacuture of the British Empire, Volumes 1-2
by Luke Herbert, and the title is quite the mouthful! Interesting to find a book that has such a strong understanding of the science of water wheels. Of course, that it was written in 1836 might have something to do with it! I found some of the relevant text online so was able to glean what I could from that, and I have the book on order from Amazon – looking forward to seeing what other gems it contains!
I’ve been playing around with fin design, with this as an early model
This was with a fin angle of 22.5o. I’ve since refined the angle to 30o, and the result is a lot better, with the inner circle now having a much greater diameter.
I am designing it as an overshot water wheel, so the turning moment of the water is important – the further away from the point of rotation that the water is maintained, the greater turning force it exerts due to gravity. In any respect, it is quite a fun evolution!
I’ve also been making a number of models on the CNC while all this has been going on, in preparation for an upcoming school fête fundraiser.
So as I said, I might have been a bit quiet on here, but that doesn’t mean that it has been so in the shed! Bags and bags of sawdust coming out (especially now I have the new collector, and the cyclone separator makes removing the full bags a breeze).
Filed under: Project, Shed, Techniques | Tagged: CNC, Luke Herbert, The Shed, water wheel | Leave a comment »