Alternator Calculation Conundrum

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Hi folks; I've been teaching myself alternator design, trying to come up with a reasonably large alternator to run from a wind turbine to power my ocean-going raft. I've been composing my work as I go, mainly to keep track of it, to back up from my many brain-numbing confusions, but with a view to e

See Venus during the day! | Bad Astronomy

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[Update (17:00 MT): I did it! Just saw Venus, with the Sun still more than 34° above the horizon. It was very faint and difficult, but once I spotted it I had it nailed. Persistence pays off, me droogs.]

On Twitter last night I mentioned that the thin crescent Moon was near Venus at sunset, and I got a lot of replies from people who ran outside to see. That was pretty nice!

But that was just after the Sun had set for me here in Boulder, when the sky was getting darker and Venus was easy to spot. But Venus can be seen in broad daylight, if you know where to look! Today is a good day to try, because the Moon is still near the planet, and the Moon is slightly easier to find.

findvenus

My advice is to try sometime after local noon. Go outside and find the Sun. Duh, that should be easy enough. At about 1:00 local time for you it should be in high in the south. This will put Venus and the Moon about 30° to the left (if you are in the northern hemisphere; reverse all this for the southern). When I make a fist with my arm fully outstretched, it spans about 10°. I have a big hand, so YMMV. But something like three fist-spans away from the Sun, parallel with the horizon, you should be able to see a very thin crescent Moon. It won’t be easy to spot; binoculars might help. Be careful not to look at the Sun though! [Edited to add: don't let kids or people inexperienced with binoculars try this; if they look at the Sun through the binocs Bad Things can happen. Looking at the sky won't hurt, but looking right at the Sun will potentially damage your eye. In fact, your best bet is to put the Sun behind a roof or a building of some sort, which not only prevents you from hurting yourself, but also makes it easier to spot the Moon.]

Once you spot the Moon, Venus will be easier. It’s just about 7-8 degrees to the right of and slightly above the Moon, between the Moon and the Sun, but much closer to the Moon (most standard binoculars have a 6° field of view, so Venus will be a little more than one FOV away from the Moon). The diagram above shows the configuration as I’ll see it here in Boulder, Colorado at about 1:30 p.m. local time. Hopefully that’ll help you find it.

Finding Venus in the daytime isn’t all that easy, and can be frustrating. If you can’t find it, don’t sweat it. But if you do, I think you’ll be amazed. I still remember the first time I did, when I was about 15. It’s weird to see something that looks like a star when the Sun is blazing away, so it’s worth the effort.

By tomorrow (Monday) the Moon will have moved farther to the east (left), so it’ll be farther from Venus, making this harder to do. So try for it today!


fan terminals

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frnds,we knw tat there is three terminals for ceiling fan.

they r starting coil terminal,running coil terminal,neutral.

but how can we find which is which?

Bearing Problem

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we have a unbalance motor for vibrating screen of 8.76 kw,recently we replaced its oth side bearing with new one (one side spherical bearing and another side cylindrical NU bearing) after assembling we observe some rubbing sound from NU side bearing,after checking we found we replaces NU2320C4 beari

Google Accident

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Everyone nowadays is yelling"Accident " to cover for some terrible bad publicity.

Google claims it accidentally collected data from WiFi ports, and as a remedy , it will no longer monitor for WiFi hot spots.

They claim they would have never known about it except for a German request fo

To be orb not to be | Bad Astronomy

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orbs_soulsoepHave you heard about orbs? In a long line of silly paranormal claims, orbs are in the pantheon, the top shelf, the upper ethereal reaches of silliness.

The idea is that when you take a picture, you’ll sometimes see little fuzzy circles in it. The obvious conclusion is that these are the souls of the dead.

I mean, c’mon! What else would they be? Out of focus dust grains that are floating in your field of view? Don’t be silly!

Image from soulsoep’s Flickr photostream.


AutoCAD Civil 3D Alignments

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I am trying to work with alignments; and when I edit a profile, this means the elevations are changed to what I want the road level to be.. How do I label these new elevations on the alignment centreline automatically thru the software.