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Old 10-12-2010, 04:00 PM   #3061
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Quote:
Originally Posted by shumakerscott View Post
I'll let your inner psycic work on this one.....
I just realized how that came out...oooops!

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Old 10-12-2010, 04:23 PM   #3062
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Originally Posted by cocobolo View Post
Everyone in the States calls them square drive screws Jim...but if they had been invented by an American instead of by a Canadian, they would no doubt have a different name.

Much like Phillips, only Robertson was the fellows name who came up with this one.
An American by the name of Arthur Van Schloogensteinackerbergfrinschnichtorplienk worked his entire adult life to develop a different kind of drive screw which was put on the market in the 1940's. Very few were sold. Some people say it's because nobody could pronounce his last name and others say it's because they were a round drive screw.

j/k
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Old 10-12-2010, 04:29 PM   #3063
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Originally Posted by gma2rjc View Post
An American by the name of Arthur Van Schloogensteinackerbergfrinschnichtorplienk worked his entire adult life to develop a different kind of drive screw which was put on the market in the 1940's. Very few were sold. Some people say it's because nobody could pronounce his last name and others say it's because they were a round drive screw.

j/k
They should have just called them Art screws for short.
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Old 10-12-2010, 04:34 PM   #3064
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....
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Old 10-12-2010, 04:51 PM   #3065
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Quote:
Originally Posted by Bud Cline View Post
Around here we have been using Torx wood screws for a long time...

EIGHT BUCKS A POUND!!!!!!!
Good gravy, they are kinda proud of them things.
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Old 10-12-2010, 04:52 PM   #3066
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Originally Posted by cocobolo View Post
I just realized how that came out...oooops!
hehehe
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Old 10-12-2010, 04:54 PM   #3067
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Quote:
Originally Posted by gma2rjc View Post
An American by the name of Arthur Van Schloogensteinackerbergfrinschnichtorplienk worked his entire adult life to develop a different kind of drive screw which was put on the market in the 1940's. Very few were sold. Some people say it's because nobody could pronounce his last name and others say it's because they were a round drive screw.

j/k
My stars, they had to borrow some of another country's alphabet to spell that one.
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Old 10-12-2010, 04:58 PM   #3068
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Originally Posted by shumakerscott View Post
Lets see if this works...




Ecofast Wood Screw: Self-Countersinking ASSY-Screw.
Allows for faster driving while still providing a 40% stronger hold!
High quality case hardened construction strongly deters head damage.
The Patented AW Drive System combines all the advantages of Phillips, Square, Torx", & Pozi Drive Bits.
Best torque transfer due to the number of contact points. Easy to insert AND extract. Self-
Centering of the bit in the screw head allows accurate screw placement.
No Come Out Drive prevents damage to screw head, enables easier driving into tough materials.

It did!
That is a great looking fastener, I bet that one would drive and hold good.
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Old 10-12-2010, 05:01 PM   #3069
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Originally Posted by jiju1943 View Post
My stars, they had to borrow some of another country's alphabet to spell that one.
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Old 10-12-2010, 05:44 PM   #3070
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Originally Posted by gma2rjc View Post
An American by the name of Arthur Van Schloogensteinackerbergfrinschnichtorplienk worked his entire adult life to develop a different kind of drive screw which was put on the market in the 1940's. Very few were sold. Some people say it's because nobody could pronounce his last name and others say it's because they were a round drive screw.

j/k
...wait a minute...are you sure that 5th "e" shouldn't be an "a"?
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Old 10-12-2010, 06:20 PM   #3071
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Originally Posted by cocobolo View Post
...wait a minute...are you sure that 5th "e" shouldn't be an "a"?
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Old 10-12-2010, 07:36 PM   #3072
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...wait a minute...are you sure that 5th "e" shouldn't be an "a"?
You could be right. I was making it up as I went along.
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Old 10-12-2010, 08:31 PM   #3073
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You could be right. I was making it up as I went along.
No....really?
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Old 10-12-2010, 08:59 PM   #3074
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Old 10-12-2010, 11:18 PM   #3075
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Coco's astronomy tip of the day (No. 8).

What about focal ratios and the powers of magnification in your telescope?

Knowing what the power of magnification in your scope is, is of utmost importance. When you set out to buy a telescope, do not be fooled by claims of 240x, 360x and 575x in a small scope, because it simply will not happen. Too many beginners have been led astray by these false claims and have become disillusioned with the results...and too often this leads to the abandonment of a great hobby.

Now, the first thing you will want to know is what is the focal ratio (f/r) of your scope.

Let's say you have your eye on a refractor which has a focal length of 800mm, and the size of the objective lens - that's the big one in the front of the telescope - is 100mm. We divide the 800mm by 100mm and come up with 8. The f/r of this telescope is 8. You would refer to this as F/8.

Now let's say you have a 10" reflector with a focal length of 50". 10 goes into 50 5 times, therefore that scope is an F/5.

My 6" reflector has a focal length of 70.2". The method is still the same...6" goes into 70.2" 11.7 times, which makes that scope an F/11.7. This is a long focal ratio, and gives a higher power of magnification for any given eyepiece.

The second part of the power (magnification) equation involves the eyepiece. Most backyard astronomers will have a selection of eyepieces of differing sizes. Typical eyepiece sizes might be 10mm, 12.5mm, 15mm, 20mm, 25mm, 30mm and even 40mm.

Using our 800mm focal length telescope, let's see what power each of these eyepieces will produce.

To determine the power, we do the same as we did with the focal ratio, except this time we use the focal length of each eyepiece for the calculations.

So using the 10mm eyepiece, we would divide 10 into 800, which would go 80 times. Therefore, the end power of the telescope with that eyepiece is 80x. The 12.5mm yields 64x, the 15mm yields 53.3x, the 20mm yields 40x, the 25mm yields 32x, the 30mm yields 26.7x and the 40mm yields 20x. As you can see...the bigger the eyepiece number, the lower the magnification.

The result of all this is that you would use your lowest power, in this case 20x to find your object, and then you would switch to a higher power for a larger view.

These eyepiece sizes listed above are very common, as is the focal length of the imaginary telescope. Please note that nowhere do you see a magnification that even reaches 100x, so now perhaps you can appreciate that the 240x, 360x, or heaven forbid the 575x are for sales purposes only and have no place in the real world of backyard astronomy. Numbers like these should make you put on your running shoes and get out of that store...but fast!

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