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<blockquote data-quote="Magnetoman" data-source="post: 149863" data-attributes="member: 2806"><p>It will be easier and more accurate to make a measurement once the flanges are removed, but the following is good enough for now.</p><p></p><p>[ATTACH=full]46481[/ATTACH]</p><p></p><p>Unfortunately, now it gets complicated. Within experimental uncertainty, the 12.5° I measured with a ruler held against the flange is consistent with the 11.3° I calculated for the angle of the spokes in the previous post (10.4° for the inner-facing spokes because of the thickness of the flanges). This would mean the spokes would need a 90° bend on the end <em>if</em> each of them went straight from the flange to the nearest point on the rim. But, they don't. They skim along the surface of the flange almost tangential to it so the angle has to be greater.[*] But, by how much greater isn't by any means straightforward to calculate.</p><p></p><p>[*]Instead of a spoke aimed for the nearest point on the rim, which would require a 90° angle for the head, if it were aimed 180° away from that it would be well outside the rim so it would require an acute angle less than 90° for the head. The actual situation is somewhere between these extremes.</p><p></p><p>[ATTACH=full]46483[/ATTACH]</p><p></p><p>For what it's worth, as the next photograph shows, to within the accuracy I can determine it <em>in situ</em>,Vincent used the same angles for both inner and outer spokes.</p><p></p><p>[ATTACH=full]46482[/ATTACH]</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 149863, member: 2806"] It will be easier and more accurate to make a measurement once the flanges are removed, but the following is good enough for now. [ATTACH type="full" alt="1470Spokes.jpg"]46481[/ATTACH] Unfortunately, now it gets complicated. Within experimental uncertainty, the 12.5° I measured with a ruler held against the flange is consistent with the 11.3° I calculated for the angle of the spokes in the previous post (10.4° for the inner-facing spokes because of the thickness of the flanges). This would mean the spokes would need a 90° bend on the end [I]if[/I] each of them went straight from the flange to the nearest point on the rim. But, they don't. They skim along the surface of the flange almost tangential to it so the angle has to be greater.[*] But, by how much greater isn't by any means straightforward to calculate. [*]Instead of a spoke aimed for the nearest point on the rim, which would require a 90° angle for the head, if it were aimed 180° away from that it would be well outside the rim so it would require an acute angle less than 90° for the head. The actual situation is somewhere between these extremes. [ATTACH type="full"]46483[/ATTACH] For what it's worth, as the next photograph shows, to within the accuracy I can determine it [I]in situ[/I],Vincent used the same angles for both inner and outer spokes. [ATTACH type="full" alt="1480Spokes.jpg"]46482[/ATTACH] [/QUOTE]
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