Riding a Bicycle Uphill: How Much Torque Is Needed?

[ahad_yekta]

how much is the turk that a usual person enter over the bicycle pedal ? ( the range )
i want to know . is it enough to ride a bicycle through drastic uphill bye foot power? or use some booster to drive better . i want to design a hydraulic transmition for bicycle . do i have to use pressure booster to increase the force on rear wheel or the 1:1 transmited turk is enough ?

 

[Danger]

Welcome to PF, Ahad. I'm afraid that your question is a little vague. The torque that you provide depends upon both your weight and the length of the pedals (lever arms). The gearing system determines the torque/speed ratio. Generally speaking, it works the same way as in a car. You start in low gear for acceleration, and then gradually shift up until you reach your desired speed.

 

[minger]

I think that maximum and typical energy outputs for humans are relatively standard. Perhaps you could take the energy and back calculate the torque based on the angular velocity?

 

[dr dodge]

in my opinion, its going to be real hard to beat the simplicity of the conventional bike gear. With a hydrostatic system, you will have more mass on the bike, from the system to generate, transfer, and possibly cool the fluid, along with the mass of the fluid. plus, I suspect, slippage will further reduce the efficiency. Interesting idea, though

dr

 

[Danger]

Agreed. It would make a cool conversation piece, but the space and weight that such a system would require would be better occupied by a motor.

 

[Mech_Engineer]

The real question is how much torque can a turk generate?

http://weslowery.files.wordpress.com/2009/07/turk-745163.jpg

 

[Bob S]

An experienced bicyclist can produce ~100 watts continuously at ~ 90 RPM.Bob S

 

[sophiecentaur]

"The real question is how much torque can a turk generate?"
You can torque the torque but can you worque the worque?

 

[dr dodge]

I don't think you know what you're torquing about

dr

 

[Danger]

I see that this thread is getting twisted...

 

[stewartcs]

I see that this thread is getting twisted...

Hey wait a moment!

 

[dr dodge]

the bad jokes keep going round and round

its almost "tau" much

dr

 

[Lsos]

I think with a mountain bike you can produce way more torque than you need. I tried going up a STEEP hill once, and the limiting factor was the front wheel coming off the ground, not the lack of torque...

 

[sophiecentaur]

That's a wheely wheely serious problem.