Bike porn

More... bloody reposts

.

Love those silver 'dales

call it kermit, you fu*kers!

Sharing disabled, but definitely worth a click: http://www.flickr.com/photos/oyj/5495599925/sizes/z/in/photostream/

Sharing disabled, but definitely worth a click: http://www.flickr.com/photos/oyj/5495599925/sizes/z/in/photostream/

worth embeding i feel

In your last paragraph, you are struggling towards the basic understanding of mechanics which will allow to see that measuring at the crank is the best way to determine the effective power output of the rider. For all practical purposes the rear wheel power measurement is fine too, the number will be slightly lower as transmission losses are already gone, and not consistently or linearly related to crank power as transmission loss varies slightly with gearing and condition of the chain.

ok, i'm not totally thick, and i can see much of what you said is word vomit.

P = W/T = F*V

so when measured at the crank, what velocity is being used to calculate power?

I ask because it will take much less force to move a bike at X miles an hour in the big cog than in the small cog. you just have to pedal faster.... in which case you use cadence as the velocity... which is rotational among other confusions... which seems very strange...

i'm not trying to be inflammatory, just wondering if the two points of measurement are truly interchangeable.

although now that i'm thinking about it, they have to be interchangeable. otherwise there's a hidden source/lose of power.

so final question... they must use cadence as the velocity?

Gitane Super Pista

:(

^^ Anti porn is that way >>>>>>>>>>>>>>>>>>>>>>>>>>

^^^ needs:

...

so final question... they must use cadence as the velocity?

Cadence is proportional to angular velocity.

Angular velocity is measured in radians per second. If cadence is measured in revolutions per minute, you have to multiply by pi/30 to get angular velocity.

Repost and WANK!

Loose the front wheel and it's fine

Casualties everywhere.

Feels at home

Loose the front wheel and it's fine

+1

so final question... they must use cadence as the velocity?

Have a gold star. Power is, as you say, force times velocity, but it is also torque times angular velocity.

One could, in principle, measure the power driving a bicycle by measuring the forward speed and the horizontal reaction where the wheel is bolted to the dropout. In fact, that's essentially how railway locomotive power is measured using a [ame]http://en.wikipedia.org/wiki/Dynamometer_car[/ame]

Repost and WANK!

Yes and no. What is it?

Cycling WMD guy's "dark" Pista Concept.

Ah thanks now I remember. It is indeed an ancient repost but I've always kind of liked it.

Gitane Super Pista

Don't like that bike to plain

No.

No No No No No.

nooo

[ame="http://www.youtube.com/watch?v=WWaLxFIVX1s"]YouTube
- ‪Darth Vader NO!‬‏[/ame]

What rear hub is that?

this thread is going into anti instead of porn