#21
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Hi David,
Great find. The chart is based on a width of arc of 60 Inches The radius of 3600.063 inches with an arc width of 60 inches has arise at the center of .125 inches. The way the chart is written is In keeping with the formula on page 4 So you must double the lengths given to have the width of the arc To visualize Draw a straight line 60 inches long At the mid point draw a straight line to the top of the page at 90 degrees to the 60" line and make this line .125 inches long. The radius that will connect the three line ends is 3600.063 inches long If you move the 60" long line up till it is 30 inches then the rise will be whatever the chart indicates it is for 15 inches Mike |
#22
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The numbers in the red headings are the X. The rest of the numbers are the Y
All per the formula on page 4 Mike |
#23
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Thanks David and Mike,
That explains the large difference in the radiuses that I could not understand. Another good member called me today and helped me with this issue as well. I now understand that the constant difference in height of 1/8" across the constant 60" span accounts for the wide range of radii. Man, there are some smart folks here. Thanks for letting me hang around.
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Will |
#24
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info
DSCN6437_800x600.jpg
DSCN6439_800x600.jpg DSCN6440_800x600.jpg DSCN6441_800x600.jpg DSCN6444_800x600.jpg DSCN6445_800x600.jpghi guys, when i was in the US a few months back my Uncle got out some of my cousins old car design text books and I took pics of this page in a book on clay modeling. Not sure if they are of any help.
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Tony Katterns Last edited by route56wingnut; 11-08-2012 at 08:05 AM. |
#25
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Quote:
Looking on Fay Butler's website they are listed as a set of up to 85 sweeps and are shown in 2 lengths but doesn't say what number they reach before dropping down to the shorter lengths. Any help appreciated.
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Gareth Davies |
#26
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i have a company that will water jet a set for around 250.00$
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Mark |
#27
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Quote:
Peter PS ....I am not sure (check with Fay) but I think that the 85 piece set cost $2950 US???
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P.Tommasini Metalshaping tools and dvds www.handbuilt.net.au Metalshaping clip on youtube http://www.youtube.com/watch?v=WEAh91hodPg Making Monaro Quarter panel: http://www.youtube.com/watch?v=KIpOhz0uGRM |
#28
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Quote:
Pretty sure I can get every single 1 from 01 up to 100 for less money than that. I'm just trying to understand at what point you go from a 60" long sweep to shorter.
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Gareth Davies |
#29
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Quote:
His are milled... he will tell you that yours need to be milled for accuracy, then give you a long rant. Especially if you tell him you want to get a set laser cut for cheaper.
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Steve |
#30
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Quote:
I have a set of 50 sweeps that I don't use much simply because the radius is never EXACTLY right for what I'm doing. Usually, I find the one that fits the best and try to maintain a consistent relationship side to side.
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Kerry Pinkerton |
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