rec.sport.unicycling · Public discussion

Adjustable Cranks

semach.the.monkey · 2007-05-30T23:28:25+00:00

Ok, so forget your double-drilled cranks, or even your tripple drilled cranks, I've been giving some thought to adjustable on-the-fly cranks recently. I've had some ideas, but the best idea I came up with last night was to look at the patents to see if anyone else has beaten me to it. So, whilst looking, I stumbled across 'this' (http://tinyurl.com/2hau7x) I wonder if Kris Holm has looked in to making these? Oh, seriously though, I know its probably an obvious assumption, but the main forces put upon a crank are when the pedals are in the horizantal position right? Decreasing to virtually zero when they're vertical? STM -- semach.the.monkey ------------------------------------------------------------------------ semach.the.monkey's Profile: http://www.unicyclist.com/profile/12078 View this thread: http://www.unicyclist.com/thread/61313 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** ---------------------------------------------------------- http://www.usenet.com

Started by semach.the.monkey · 30 May 2007 · Last activity 6 June 2007 · 9 posts · 579 views

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01 / Original postAdjustable Crankssemach.the.monkey · 30 May 2007 02 / This pagePosts 1–9Page 1 of 1 · chronological order 03 / Latest replyPost #9thejdw · 6 Jun 2007

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Original section: rec.sport.unicycling
Published: 30 May 2007
Last activity: 6 June 2007
Original author: semach.the.monkey
Posts: 9
Discussion status: Public discussion
Total views: 579
Views / 30 days: 3

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Original post
semach.the.monkey
Archived post

30 May 2007, 23:28 UTC #1

Ok, so forget your double-drilled cranks, or even your tripple drilled
cranks, I've been giving some thought to adjustable on-the-fly cranks
recently. I've had some ideas, but the best idea I came up with last
night was to look at the patents to see if anyone else has beaten me to
it.
So, whilst looking, I stumbled across 'this'
(http://tinyurl.com/2hau7x)
I wonder if Kris Holm has looked in to making these?
Oh, seriously though, I know its probably an obvious assumption, but
the main forces put upon a crank are when the pedals are in the
horizantal position right? Decreasing to virtually zero when they're
vertical?
STM
--
semach.the.monkey
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unisk8r
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31 May 2007, 00:08 UTC #2

Like Smokey the GEICO Biker says: Neat!
But the system would have to be made of a semi-solid gas to keep the
weight down.
--
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unisk8r
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31 May 2007, 03:38 UTC #3

semach.the.monkey said:
Oh, seriously though, I know its probably an obvious assumption, but the
main forces put upon a crank are when the pedals are in the horizantal
position right? Decreasing to virtually zero when they're vertical?
Yes. In both forward & backward mode.
--
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enahs
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31 May 2007, 03:54 UTC #4

unisk8r said:
Like Smokey the GEICO Biker says: Neat!
But the system would have to be made of a semi-solid gas to keep the
weight down.
I agree the weight would be too high, plus imaging catching the
sprocket to the shin!
--
enahs
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Brian O.
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31 May 2007, 04:02 UTC #5

Talk about q-factor, I've seen better solutions before. Search the
forums for crazy cranks.
--
Brian O.
mscalisi said:
We only need one 36" rim, one that doesn't suck. A properly sized KH rim
(like the 29er only larger) would be awesome.
'ProjectUNI' (http://www.otherworldsociety.org/projectuni) - The
Unicyclist PC Game - In Early Development.
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ahollow
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31 May 2007, 12:51 UTC #6

Here's an idea for a crank plate. It starts at 170mm and goes around in
10mm increments, all the way down to 90mm. Plate would be aluminum,
approx 3/8" thick for threading. The black areas are cutouts, and the
circles the pedal holes. This one is for a cotterless hub, but I guess
you could do a splined one also.
If you did a crank grab with these, you could continue to ride on the
crank itself!
[image: http://ahollowell.com/uni/crank.jpg]
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texasuninut
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6 June 2007, 15:47 UTC #7

Another view?
+-------------------------------------------------------------------+
|Filename: pathtall.gif |
|Download: http://www.unicyclist.com/attachment/20437 |
+-------------------------------------------------------------------+
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mornish
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6 June 2007, 15:55 UTC #8

ahollow said:
Here's an idea for a crank plate. It starts at 170mm and goes around in
10mm increments, all the way down to 90mm. Plate would be aluminum,
approx 3/8" thick for threading. The black areas are cutouts, and the
circles the pedal holes. This one is for a cotterless hub, but I guess
you could do a splined one also.
If you did a crank grab with these, you could continue to ride on the
crank itself!
[image: http://ahollowell.com/uni/crank.jpg]
I think that that would bend sooooo easily.
--
mornish
aim:kiloornish
email: mornish AT gmail DOT com
Spencer said:
well, at least I'm not drinking my own blood, I only drink other
people's blood...

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thejdw
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6 June 2007, 16:33 UTC #9

mornish said:
I think that that would bend sooooo easily.
+1, would have to be CrMo
--
thejdw
dunawan said:
why are koxx one unicycles so costly???
forrestunifreak said:
They are expensive because they use only the finest soft drink cans.
Quoted message said:
Quoted message said:
don't follow Jesus, follow me!<<

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