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A single-speed bicycle is a type of bicycle with a single gear ratio and a freewheel mechanism. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle. Adult single-speed bicycles typically have a gear ratio of between 55 and 75 gear inches, depending on the rider and the anticipated ...
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
Gain and Watts Calculator; Mike Sherman's gear calculator Archived 2011-03-10 at the Wayback Machine Online calculator for derailleur gears, with useful graphic displays; HPV Drivetrain Analyzer A drivetrain analyzer and gear calculator for HPV's (Human Powered Vehicles) that will handle compound drives and geared cranks and hubs.
In accordance with federal law, all power-assisted bicycles, regardless of province, must 1) have a maximum of three wheels; 2) have steering handlebars and pedals; 3) use an electric motor of 500 W output or less for propulsion; 4) must not be capable of speeds faster than 32 km/h (20 mph) on level ground using motor power alone; and 5) bear a ...
The power band of an internal combustion gasoline automobile engine typically starts at midrange engine speeds (around 4,000 RPM) where maximum torque is produced, and ends below the redline after reaching maximum power (above 5,000 RPM but less than 7,000 RPM). Diesel engines in cars and small trucks may develop maximum torque below 2,000 RPM ...
The consumer price index released on November 13 showed the prices of consumer goods and services rising 2.6% year over year, ... which means about $5,000 on a $500,000 home loan, with each point ...
Power and torque curves for two example car engines. Since the torque and power output of an internal combustion engine varies with its rpm, automobiles powered by ICEs require multiple gear ratios to keep the engine within its power band to produce optimal power, fuel efficiency, and smooth operation. Multiple gear ratios are also needed to ...
Save up to 50% off major appliances including deep freezers, ranges and cooktops at Best Buy through Dec. 2. We're eyeing this 4-door Samsung refrigerator and ice maker combo.
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