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.
When you pedal a bicycle maximum torque is produced?
When you pedal a bicycle, maximum torque is produced when the pedal sprocket arms are in the horizontal position, and no torque is produced when they are in the vertical position.
How much horsepower can a human generate on a bike?
The power a human can generate is highly dependent on the duration of the effort. In a four-second burst, a weightlifter might generate 3 horsepower. A world-class cyclist will generate 0.65 hp for a 1-hour time trial — all-out effort. Most recreational cyclists generate about 0.35 hp for a sustained (2 hour) ride.
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 standard 41 chain is rated to 2000 pounds. A chain lesser than a bicycle chain was rated at 900 pounds so that should give you some range to go by. My marginally educated guess would say that a multi speed bike chain would be around 1000 pounds and a 410/BMX chain I would say in the 1200 pound range.
Can a force produce a torque when there is no lever arm?
Can a force produce a torque when there is no lever arm? No because there needs to be a lever arm to produce torque.
Which will have the greater acceleration rolling down an incline?
Which will have the greater acceleration rolling down an incline, a hoop or a solid disk? Why does this happen? A solid disk because regardless of mass or radius, the object with the larger inertia relative to its own mass has the greater resistance to a change in its motion.
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. … Watts are unbiased. “That’s what’s great about wattage.
Is 20 mph on a bike fast?
Most cyclists can achieve 10-12 mph average very quickly with limited training. More experienced, short-medium distance (say 20-30 miles): average 15-16 mph. Reasonable experience, medium (say 40 miles): average around 16-19 mph.
Is 1hp equal to 1 horse?
Does one horsepower equal one horse? Not quite. It’s a common misconception that one horsepower is equal to the peak power production of a horse, which is capable of a maximum of around 14.9 horsepower. By comparison, a human being is capable of approximately five horsepower at peak power production.
Is 400 watts a lot of power cycling?
As you can see, the best human efforts at producing power over the course of an hour on a bicycle are around 300-400 Watts.
How many watts is 25 mph?
|Speed – kmh (mph)||Power (watts)||Increase in power needed to increase speed by 2.5kmh|
How do I turn my bike into a generator?
- Step 1: PowerPoint Presentation. …
- Step 2: Obtain a Bicycle and Remove the Back Tire. …
- Step 3: Build a Stand to Elevate the Bicycle Off the Ground. …
- Step 4: Attach the Drive Belt Along the Back Rim. …
- Step 5: Attach the Motor to the Stand. …
- Step 6: Place a Diode in Series With the Motor and Battery.
How do I exert more torque?
Increasing the length of a lever arm, like a wrench, exerts more torque on its bolt. The longer the lever arm, the more torque is produced by the same amount of force pushing on the end of the lever.
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 is the strongest bike chain?
Pragmasis Protector 16mm Chain – Strongest Stationary Bike Lock. The Pragmasis Protector 16mm is the strongest stationary bicycle chain lock on the market. This chain is made from hardened Boron steel and weighs a whopping 3.02lb per foot (4.5kg per metre).