## Ethical Logistics . org

# Bikes

+Electric_Vehicles

+Tadpole_Trikes

+Delta_Trikes

+Other_Bikes

+Camper_trailer

+Mono_shock_front_suspension

+Tracks

+Wheels

+Suspension

+Miniature_car_body_replicas

+Induction_Motor_Systems

+Wheel_Building

Wheel Building https://www.youtube.com/watch?v=p2jTrJYJGd8

Nine Continents Hub Motor repair https://www.youtube.com/watch?v=vrUjPNIs348

./Recumbent Trike Design Primer.pdf

./Definition_Tool_for_Vehicles_with_Three_Wheels_or_Less.ppt

https://en.wikipedia.org/wiki/Variable-frequency_drive for non permanent magnet motors

Schlumpf geared bottom bracket (Mountain Drive)

**"Drag increases by the square of the speed, not the cube. Power required goes by the cube, though...**

**The power required to overcome the aerodynamic drag is given by:**

**Pd = Fd.V = 1/2 rho v(cubed) A Cd**

**Note that the power needed to push an object through a fluid increases as the cube of the velocity. A car cruising on a highway at 50 mph (80 km/h) may require only 10 horsepower (7.5 kW) to overcome air drag, but that same car at 100 mph (160 km/h) requires 80 hp (60 kW). With a doubling of speed the drag (force) quadruples per the formula. Exerting four times the force over a fixed distance produces four times as much work. At twice the speed the work (resulting in displacement over a fixed distance) is done twice as fast. Since power is the rate of doing work, four times the work done in half the time requires eight times the power."**

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