Torque is force times radius. Assuming crank length 175mm and rider’s weight of 140 pounds, that gives us 80ft.lb or 109 NM torque when rider is standing and crank is *parallel to the ground*. The average torque will be much lower, something about 50NM.
How much torque is needed to move a bike?
If you want to connect a motorized drive wheel, you will need to be able to generate that much force on the edge of the drive wheel. If you have a 5 cm radius wheel you would have a torque of 10 Nm (0.05 x 200), with a speed of 400 rpm (5 times greater than the speed of the pedals).
How much power can a cyclist generate?
During a bicycle race, an elite cyclist can produce close to 400 watts of mechanical power over an hour and in short bursts over double that—1000 to 1100 watts; modern racing bicycles have greater than 95% mechanical efficiency.
How much torque can a bike chain handle?
A strong rider can put about 1,500 Newton propulsive force on a pedal which, depending on the gearing, can translate into a propulsive torque of 1,000 Newton-meter. That’s a huge number, even compared to a lot of cars.
How much torque is required to move a car?
so rotational speed = Power / torque = 50,000 / 160 = 312.5 rad/s = 2984 rpm. Therefore a 50 kw motor, running at almost 3,000 rpm and producing a torque of 160 Nm, can accelerate a 200 kg vehicle at 4g up to a speed of 14 mph providing the vehicle is fitted with a suitable traction system.
How do you calculate starting torque?
We know that at the start the rotor speed, N is zero. So, the equation of starting torque is easily obtained by simply putting the value of s = 1 in the equation of torque of the three phase induction motor, The starting torque is also known as standstill torque.
Is 200 watts good cycling?
Most pro cyclists produce about 200 to 300 watts on average during a four-hour tour stage. The recreational rider, on the other hand, might be only able to sustain this wattage during a 45-minute or hour-long spin class. … “That’s what’s great about wattage.
What was Lance Armstrong’s FTP?
Lance Armstrong said he used to be able to average 495 watts for 30-40 minutes.
Is 4 watts per kg good?
So it is that many club level cyclists have the goal of being able to achieve a functional threshold power (FTP) of 4W/kg. … However, 4W/kg is still better than most club level cyclists, and is literally lapping everyone on the couch. So it’s a great goal to target.
How can I increase my cycling torque?
5 Simple Ways to Increase Bike Power
- Ride in bigger gears. Riding in bigger gears at the same cadence in a particular set of conditions makes for a consistently higher power output. …
- Ride uphill. …
- Ride into headwinds. …
- Use block training. …
- Follow the 75-percent rule.
Does more torque mean faster acceleration?
A car with more hp than torque will always be quicker since this gives a car acceleration and speed. … This is why low-end torque becomes important for better acceleration in many scenarios. Higher torque doesn’t mean one vehicle will necessarily be faster than another, though.
Do bike chains break?
Chains, like anything else on your bike, can be damaged if it gets hit hard enough. While not as common, chains can break if they are involved in a rock strike or other impact. Impact damage to chains can be more difficult to repair than if the chain breaks due to wear.
What can you say about the acceleration of bicycle?
The acceleration of the bicycle will depend on how much force exerted doing the pedal for the bicycle to accelerate. The muscle of your legs will be the source of force for the bicycle to move and you together with the bicycle provides the mass. Lesser mass and strong force will result to higher acceleration.
How much force can a bicycle chain take?
A typical bicycle chain has the breaking strength on the order of 1000 kgf. It must withstand 200 lb of tension for hours on end without permanent deformation, merely because that’s the amount of tension it would experience during pedaling out of the saddle.