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Thread: Why Starret?
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24th May 2015, 09:50 AM #31SENIOR MEMBER
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If I remember correctly, a triangle with sides 3 : 4 : 5 should give a "perfect" square. All to do with this truly ancient codger Pythagoras.
The challenge remains the accurate measuring of 3 4 & 5 in the first place, which now brings us to the accuracy of the measuring tools used!!!!
And on we go....
Yvan
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24th May 2015 09:50 AM # ADSGoogle Adsense Advertisement
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24th May 2015, 09:59 AM #32
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24th May 2015, 10:07 AM #33
Yep, Luke, as FF says, that's it. I usually only scribe a single, thin line; when the edge of the square lies wholly within or along the scribe line when the square is flipped, you've got it pretty close. The obvious caveat is to be sure the edge you use to butt the stock against is as straight as it can be.
The beauty of this method is that you see double the error because any divergence from a true 90* is mirrored. When you get to my age, you'll realise how necessary that can be.....
Cheers,IW
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24th May 2015, 10:08 AM #34SENIOR MEMBER
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24th May 2015, 10:14 AM #35
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24th May 2015, 10:14 AM #36
Actually, I think it was the Egyptians who figured out the 3:4:5 ratio, quite a while before young Pythagoras figured out that the squaw on the hipopotamus was equal to the sum of the squaws on the other two hides (or something like that!). At least he didn't go running down the street naked, yelling "Eureka" like that exhibitionist Archimedes......
The things we remember from our school days, eh?
IW
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24th May 2015, 10:19 AM #37
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24th May 2015, 10:19 AM #38
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24th May 2015, 10:20 AM #39SENIOR MEMBER
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24th May 2015, 10:24 AM #40
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24th May 2015, 01:38 PM #41
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27th May 2015, 10:37 AM #42GOLD MEMBER
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My go to square is the Nobex - not El cheapo but does great work. Had it for many years and still going accurately.
http://www.carbatec.com.au/nobex-multi-squares_c4620Regards,
Bob
Absence of evidence is not evidence of absence.
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27th May 2015, 01:13 PM #43GOLD MEMBER
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Another variation of Pythagorus Theorem is 5, 12, 13 where 5 and 12 are the two sides of a right angled triangle and 13 is the hypotenuse.
Sometimes useful when you cannot use 3, 4, 5 or any multiples of themTom
"It's good enough" is low aim
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