Bricycles

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Bricycles

Description: 

This is a three wheeled electric bike enclosed in a full fairing. It is still in development with a prototype having been built.

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Speed Versus Power For Different Cycle Types

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Speed Versus Power For Different Cycle Types

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A chart compiled by the NVHPV (Dutch HPV Club), using their SRM measuring thingummy-doodah, showing the power efficiency of different kinds of bicycles. The bicycles range from a normal typical bike to a recumbent with full fairing. It shows a drastic range of power required to attain a given speed (40 km/hr) and the speed attained for 250 watts of power.

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Another 30s Cycle Car

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Another 30s Cycle Car

Description: 

An example of a motorcycle with an aerodynamic fairing.

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5th generation civic hatchback - improving aerodynamics

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5th generation civic hatchback - improving aerodynamics

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A discussion by one guy modifying his Honda Civic hatchback to be highly aerodynamic.

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Finding out stock drag coefficient?

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Finding out stock drag coefficient?

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A discussion about drag coefficients, listings of "stock" (unmodified vehicle) drag ratings, etc.

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Index to Coefficient of Drag for Many Vehicles Plus Index to Horsepower vs Speed Curves

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Index to Coefficient of Drag for Many Vehicles Plus Index to Horsepower vs Speed Curves

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This is a long table of drag coefficient data. It was harvested from a small computer program that has the capability to show speed through the gears, top speed, time to get there plus a lot of other neat stuff.

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Measure the drag coefficient of your car

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Measure the drag coefficient of your car

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The purpose of this experiment is to determine your vehicle's drag coefficient Cd and coefficient of rolling resistance Crr. This is done by measuring your vehicle's speed as a function of time while coasting in neutral.

Why would you want to know Cd and Crr for your vehicle? Well, suppose you're interested in modifying your vehicle for improved fuel efficiency. You might consider modifications such as air dams, wheel skirts, removing mirrors, switching to low rolling resistance tires, etc. Cd and Crr offer a quantitative method of comparing vehicle performance before and after these types of modifications to see if you made any improvement.

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metrompg.com

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metrompg.com

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First, a source of info for anyone wondering whether to get one of the Suzuki-designed 3-cylinder fuel economy champs: Geo Metro / Chevrolet Metro, Sprint / Pontiac Firefly / Suzuki Swift, Cultus, Forsa. Second, a source of info about DIY efficiency mods, fuel-efficient driving, and fuel economy in general.

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Ecomodders make fuel good to the last drop

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Ecomodders make fuel good to the last drop

Description: 

A series of pictures showing 'ecomodding' which is a practice to make modifications to a vehicle to make it more efficient. It's possible with a small amount of work and with inexpensive materials to greatly improve fuel efficiency. Turner spent $400 on hardware store materials including aluminum bars and sheeting; polycarbonate, corrugated plastic; screws; and pop rivets. Now he says he gets up to 74 miles per gallon in the summer. A Civic from that era might normally achieve an average of 33 miles per gallon.

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