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| Colin Thorne's - Portable Ring Sundial by Craynerd |
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| andyf:
--- Quote from: craynerd on July 02, 2011, 06:33:13 PM ---..... it is only portable as long as I stick to 53 deg North in my latitude!!! Not so portable in my opinion. --- End quote --- The latitude is a bit restrictive, Chris, but (allowing half a degree either way) take it with if you visit Minsk, Petropavlosk, Tolyatti or Samara in Russia, in case your watch ends up in someone else's pocket. Likewise, Liverpool :lol: Andy. |
| DMIOM:
--- Quote from: andyf on July 02, 2011, 08:14:41 PM ---....... Likewise, Liverpool :lol: Andy. --- End quote --- OT - at least in Liverpool there's more chance of seeing the sun! I say that from experience - When I went from the Isle of Man to Liverpool to do my first degree, the weather wasn't too bad, but I then went to UMIST to do my Masters and was somewhat unhappy when it rained some part of each of the first 26 days that I was there! Back on topic - once you've got this one working Chris, then let loose :proj: How about, for mk II : instead of a hole, mill a slit covering a reasonable range of lattitude. Then, make a profiled slider to run as a clasp on the main ring, with just the hole, and with a suitable scale/pointer arrangement - so you just elevate or depress the hole to match your current lattitude? (if the holes at different lattitudes aren't aren't on the same circumferential, then make the slit follow the locus of those holes and make the slider with just a cross-slit). Dave |
| raynerd:
Very apt that on the sunniest day of the year, perhaps even of the last few years, glorious sun and blue sky without a cloud in the sky all day long, I finished my sundial.....well near enough to test it out. I first drilled and tapped the ring for the hanger It is held by two little cheese head 10BA screws: I soldered up the little ring holding stub on the top. I must admit, it went pretty dirty looking....I need some citric acid for pickling asap. After a little polishing, more needed, it looks good. I don`t know if my friend knew the position of the gnomon hole but it fits perfectly below the engraving! The following photo is well out of focus but it shows how clear the "sun spot" appears on the scale! And here it is working, it was getting late so the sun wasn`t at its best still very clear to read: The date is July 3 - therefore we are in Cancer which is the very first column. The time relates to around 6:15pm. The time was 7:15pm and the dial was reading about 6:15pm ....I really really presume this is OK, but in my opinion that is correct as we are currently in british summer time, hence an hour in front of GMT. I`m very impressed with it! Needs some elbow grease now to polish it up and then a chain! Chris |
| DaveH:
Chris, Well I have to say I am impressed, looks very good - really smart. :clap: :clap: :clap: You have done a good job there - well done. :thumbup: :thumbup: :thumbup: :beer: DaveH |
| sbwhart:
Good job that man :clap: :clap: :clap: --- Quote ---The time was 7:15pm and the dial was reading about 6:15pm ....I really really presume this is OK, but in my opinion that is correct as we are currently in british summer time, hence an hour in front of GMT. I`m very impressed with it! --- End quote --- Don't forget British summer time they put the clocks forward 1 hr but they can't put the sun forward. :D I think thats a very good result Stew |
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