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Originally Posted by joegrundman
Hi PB
You got some pix yet of your new circular slide rule?
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Sorry! I just got busy with things, and forgot to post one.
Here is a picture of it:
I've used it a couple of times.
I ran out of transparencies, so I had to make the small wheel with the indicator arm out of cardstock.
I'm not entirely happy with it though, for a couple of reasons.
First, my printer seems to 'drag' when I feed it cardstock. Whenever I print out one of these things on cardstock and then cut them out, they aren't exactly round. It's more of an aesthetic problem then an accuracy one, but it's annoying nonetheless (although I must mention that it did cause an accuracy problem when I made a large circular slide rule).
Second, I don't think I centered the wheels as carefully as I normally do. I did it quickly in the evening one night, and I was hurrying.
It is accurate enough, though. I've used it to sink a couple of tramp steamers.
I'm thinking about getting a DVD drive for my home machine so I can put SHIV on it, and make a really good version of the US SACF/IS-WAS, which of course this wheel is based upon. I made a mini version of the Omnimeter side, which works quite well:
You can see that it is smaller than the German version, and in fact is less than 5 inches in diameter.
Excuse the crappy webcam pics, by the way. The good camera needs batteries.