network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 8 months |
| seen | May 4 at 5:14 | |
| stats | profile views | 4 |
I'm a commuter cyclist and mechanic. I occasionally enter collegiate races.
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Mar 8 |
answered | How long will a battery last in a Garmin GSC 10? |
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Sep 29 |
awarded | Scholar |
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Sep 29 |
comment |
Are there any high power bicycle generators? @lmre, The source you cite gives the efficiency of a pedal-powered generator system (with a bad topology and worst-case sub-system efficiencies) as 30%. The source claims the generator itself is 80% efficient at turning mechanical work into electricity. 80% is in line (though at the low end) with what I've seen in other literature. Assuming 90% efficient converters is reasonable given the static load in this application, so I would expect the mechanical power to be under 15W, including the drive train. |
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Sep 29 |
accepted | Are there any high power bicycle generators? |
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Sep 29 |
comment |
Are there any high power bicycle generators? This is good information, but we're going to have to agree to disagree on the issue of power. The ultimate purpose is for night commuting, which passes through some unlit areas with potholes. Car headlamps output 1500Lm to 2000Lm (two incandescent or Xenon on low), so I fundamentally can't get behind the position that a bicycle light should be restricted to below half that (I can back the idea that each element of the light should be below 800 Lm, though) |
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Sep 27 |
comment |
Can cars legally drive in the bike lane down the street? The questioner says he's in LA. If he's in the city of Los Angeles (as opposed to Los Angeles County) the anti-harassment ordinance might come in handy: articles.latimes.com/2011/jul/21/local/… |
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Sep 27 |
awarded | Student |
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Sep 27 |
asked | Are there any high power bicycle generators? |
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Aug 23 |
awarded | Analytical |
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Aug 23 |
answered | Are Hövding helmets safer than regular helmets? |
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Aug 23 |
awarded | Supporter |
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Aug 23 |
answered | Is it possible to perform tricks with 100% safety during commuting? |
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Jul 16 |
answered | Can I damage my brakes by testing them vigorously? |
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Jul 15 |
awarded | Teacher |
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Jul 15 |
answered | Converting crankset from 28-38-48 to 30-39-53 |
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Jul 15 |
awarded | Editor |
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Jul 15 |
revised |
Clip-on to temporarily convert Look pedal to stand-on style? added a few details |
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Jul 15 |
answered | Clip-on to temporarily convert Look pedal to stand-on style? |
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Jun 29 |
answered | “Clacking” noise coming from drivetrain |
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Oct 4 |
answered | Fuji Thrill shimano gears |
