Graham - Last comments http://nonplatonic.com/index.php?blog=9&disp=comments en-US hourly 1 2000-01-01T12:00+00:00 In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1374 2006-02-16T13:19:58Z collin [Member] Ok, mea culpa, I screwed up with the chainlength thing. But I can't see where I screwed up. chainlength=0; chainlength+=cogteeth; chainlength+=rteeth; chainlength+=2*(sqrt( pow(staylength, 2) + pow((rteeth/pi)-(cogteeth/pi), 2) ) ); So, where am I wrong... If pin-to-pin is 1/2", then for an n tooth ring/cog the circumference is 2*n. Hence, half the circumference is n, lines 2&3. Which gives 2*n=2*pi*r => 2*n / 2*pi = n/pi = r. And then the last line is just the pythagorean thm. And yeah, this assumes the chain leaves the ring/cog at theta=0, I'll fix this and then try a more complicated version.

chainlength=0;
chainlength+=cogteeth;
chainlength+=rteeth;
chainlength+=2*(sqrt( pow(staylength, 2) + pow((rteeth/pi)-(cogteeth/pi), 2) ) );


So, where am I wrong... If pin-to-pin is 1/2", then for an n tooth ring/cog the circumference is 2*n. Hence, half the circumference is n, lines 2&3.

Which gives 2*n=2*pi*r => 2*n / 2*pi = n/pi = r. And then the last line is just the pythagorean thm. And yeah, this assumes the chain leaves the ring/cog at theta=0, I'll fix this and then try a more complicated version.]]>
In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1368 2006-02-11T16:53:19Z ben [Member] It looks like the Bianchi is about 49.5" with a 50-18 and 15.5" for the stay. It's so depressing that a random stranger is riding something bigger than me. I hope you live somewhere flat Rodrigo Hernando de la Sosa... if you're from San Francisco, I'm going to be extremely depressed. In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1366 2006-02-11T03:13:03Z ben [Member] Ha ha. Let's see you do it... In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1365 2006-02-11T02:15:00Z graham [Member] http://en.wikipedia.org/wiki/Paris_roubaix In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1363 2006-02-11T01:52:12Z ben [Member] I almost made it down the hill without walking. There were cobblestones. It doesn't count. In response to: Fucking Dispatch http://nonplatonic.com/index.php?blog=9&title=fucking_dispatch&more=1&c=1&tb=1&pb=1#c1362 2006-02-11T01:50:29Z ben [Member] No you suck. Like totally. In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1361 2006-02-11T00:02:57Z Rodrigo Hernando de la Sosa [Visitor] I think your chain length got messed up somewhere. That's one hell of a long chain. For 50x16 gearing with a 14.5" stay, i get a ~45.65" chain. That's about 1/10" off from the chart (which has completely lost me by now) if I read it correctly.
For 50x16 gearing with a 14.5" stay, i get a ~45.65" chain. That's about 1/10" off from the chart (which has completely lost me by now) if I read it correctly.]]>
In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1358 2006-02-10T21:02:06Z admin [Member] That took me longer than it should have to figure out what the hell he was talking about. Ugh, "40=0+/- 1/2" meaning "40=0 mod .5". Whatever. Since pin-to-pin on a regular chain is 1/2" the number of teeth on a ring/cog is half the circumference in inches. Took me a while to figure that out too. Sigh. I agree with ben that the difference between cog and ring should make a difference. I wrote something to compute total chain length, it's in ~/vertdrop/. Sample output: Enter stay length in inches (c-to-c): 14.5 Enter number of cog teeth: 14 Enter smallest ring size (even number): 30 Enter largest ring size (even number): 54 cog: 14 ring: 30 chain length: 74.7368 cog: 14 ring: 32 chain length: 77.1819 cog: 14 ring: 34 chain length: 79.672 cog: 14 ring: 36 chain length: 82.2049 cog: 14 ring: 38 chain length: 84.7787 cog: 14 ring: 40 chain length: 87.3912 cog: 14 ring: 42 chain length: 90.0403 cog: 14 ring: 44 chain length: 92.724 cog: 14 ring: 46 chain length: 95.4403 cog: 14 ring: 48 chain length: 98.1871 cog: 14 ring: 50 chain length: 100.963 cog: 14 ring: 52 chain length: 103.765 cog: 14 ring: 54 chain length: 106.593 So, unless I'm retarded, the total length has to be slightly bigger than an integer so you can actually put the chain together... My numbers don't match up with his, ie 14+30=44 -> 74.7368 inches, which doesn't sound like it would work at all. [edit: this was collin]
I agree with ben that the difference between cog and ring should make a difference. I wrote something to compute total chain length, it's in ~/vertdrop/. Sample output:

Enter stay length in inches (c-to-c): 14.5
Enter number of cog teeth: 14
Enter smallest ring size (even number): 30
Enter largest ring size (even number): 54

cog: 14 ring: 30 chain length: 74.7368
cog: 14 ring: 32 chain length: 77.1819
cog: 14 ring: 34 chain length: 79.672
cog: 14 ring: 36 chain length: 82.2049
cog: 14 ring: 38 chain length: 84.7787
cog: 14 ring: 40 chain length: 87.3912
cog: 14 ring: 42 chain length: 90.0403
cog: 14 ring: 44 chain length: 92.724
cog: 14 ring: 46 chain length: 95.4403
cog: 14 ring: 48 chain length: 98.1871
cog: 14 ring: 50 chain length: 100.963
cog: 14 ring: 52 chain length: 103.765
cog: 14 ring: 54 chain length: 106.593


So, unless I'm retarded, the total length has to be slightly bigger than an integer so you can actually put the chain together... My numbers don't match up with his, ie 14+30=44 -> 74.7368 inches, which doesn't sound like it would work at all.

[edit: this was collin]]]>
In response to: Fucking Dispatch http://nonplatonic.com/index.php?blog=9&title=fucking_dispatch&more=1&c=1&tb=1&pb=1#c1357 2006-02-10T19:57:12Z graham [Member] I was like "Do you have 'The General'?" and she was like "This IS 'The General'!" and I was like "NO WONDER IT SUCKS SO MUCH!" In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1356 2006-02-10T19:31:43Z graham [Member] That's the part that caught my attention also. Yes, brakes are for girly-men. If there's ever a really steep hill I'll ride around it or walk my bike down.
Yes, brakes are for girly-men. If there's ever a really steep hill I'll ride around it or walk my bike down.]]>
In response to: Fixed with Vertical Dropouts http://nonplatonic.com/index.php?title=fixed_with_vertical_dropouts&more=1&c=1&tb=1&pb=1#c1355 2006-02-09T22:03:23Z ben [Member] I'm skeptical about this: "The difference in length due to the chainring being larger than the cog is not worth calculating." I'd just try whatever combinations you can with whatever you have around. And no brakes. Safety is for the weak.
"The difference in length due to the chainring being larger than the cog is not worth calculating."

I'd just try whatever combinations you can with whatever you have around. And no brakes. Safety is for the weak.
]]>
In response to: Bill Nye the Rich Guy http://nonplatonic.com/index.php?blog=9&title=bill_nye_the_rich_guy&more=1&c=1&tb=1&pb=1#c1354 2006-02-09T08:27:19Z xenon [Visitor] online pokerOnline Pokerpoker chipsChips OnLinefree pokerFree Pokerpoker tablesCASINO POKERparty pokerParty pokerfree online pokerPoker Chipspoker rulesGambling Rulespoker tablePoker Tableinternet pokerInternet Poker In response to: iPAQ not so useless after all http://nonplatonic.com/index.php?blog=9&title=ipaq_not_so_useless_after_all_1&more=1&c=1&tb=1&pb=1#c1351 2006-01-30T15:15:01Z graham [Member] Fixed the volume... I'm a moron. In response to: Bye bye SPG http://nonplatonic.com/index.php?blog=9&title=bye_bye_spg&more=1&c=1&tb=1&pb=1#c1341 2006-01-23T22:23:22Z creaming [Visitor] http://www.femmesdenudees.com/lesbienne/hosenda/pantyhose/tops/index.html garyhoodlumnow In response to: iPAQ not so useless after all http://nonplatonic.com/index.php?blog=9&title=ipaq_not_so_useless_after_all_1&more=1&c=1&tb=1&pb=1#c1338 2006-01-23T08:02:11Z graham [Member] Newton? OK... sure. So I have the HP headset headphones now (the nicer Samsungs didn't play in both ears, which I don't understand), and the max volume is a 3 or 4 out of 10, but being able to listen to KEXP 24/7 is the sort of thing I could get used to.
So I have the HP headset headphones now (the nicer Samsungs didn't play in both ears, which I don't understand), and the max volume is a 3 or 4 out of 10, but being able to listen to KEXP 24/7 is the sort of thing I could get used to.]]>
In response to: iPAQ not so useless after all http://nonplatonic.com/index.php?blog=9&title=ipaq_not_so_useless_after_all_1&more=1&c=1&tb=1&pb=1#c1334 2006-01-22T22:54:29Z graham [Member] I'm not sure what the jack on the bottom is, but it's not 1/8". In response to: iPAQ not so useless after all http://nonplatonic.com/index.php?blog=9&title=ipaq_not_so_useless_after_all_1&more=1&c=1&tb=1&pb=1#c1329 2006-01-22T15:17:47Z collin [Member] I want a Newton. In response to: iPAQ not so useless after all http://nonplatonic.com/index.php?blog=9&title=ipaq_not_so_useless_after_all_1&more=1&c=1&tb=1&pb=1#c1328 2006-01-22T12:42:04Z ben [Member] I think it has one on the bottom. In response to: Which Frame Should I Use? http://nonplatonic.com/index.php?blog=9&title=which_frame_should_i_use&more=1&c=1&tb=1&pb=1#c1319 2006-01-21T16:33:39Z collin [Member] Hmmm... I kinda like the Lotus. Doesn't the LeMond have big brazed on deraileur cable tensioner doohickies on the down tube? Kinda breaks up the clean lines of a fixy. Maybe a 1x8 setup? Or... You could make little led blinkers that fit in the tensioners. You might be able to turn the threaded tensioner part into a switch. And blue led's. That would be cool. And you should paint it, red glitter. I kinda like the Lotus. Doesn't the LeMond have big brazed on deraileur cable tensioner doohickies on the down tube? Kinda breaks up the clean lines of a fixy. Maybe a 1x8 setup? Or... You could make little led blinkers that fit in the tensioners. You might be able to turn the threaded tensioner part into a switch. And blue led's. That would be cool. And you should paint it, red glitter.]]> In response to: More radio - M.I.A. http://nonplatonic.com/index.php?blog=9&title=more_radio_m_i_a&more=1&c=1&tb=1&pb=1#c1318 2006-01-20T10:52:00Z practically [Visitor] http://www.sexeici.com/gai/mmmak/voyeur/bathroom/woman.html beckonframedrotating