human

The Recumbent Bicycle and Human Powered Vehicle Information Center

Most
of the information about car aerodynamics seems to be centered around generating
downforce. While this may be needed for race cars, the average 3000+
pound car driving at speeds below 90 MPH does not need to be concerned
with downforce. If you are trying to improve the efficiency of your
vehicle, reducing the
coefficient of drag (Cd) should be the main
concern. 



Rationale 




In this day and age of expensive fuel and inefficient vehicles, it makes sense
both economically and ecologically to conserve as much fuel as possible. To
accomplish this, you could go out and buy another car with better
mileage, but there are other options. This article focuses on how to optimize your current vehicle. 


The example vehicle is a 1998 Nissan Maxima. This is a rather boxy
4 door sedan with quite a lot of ground
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Historically, societies have always located near water, due partly to the
fact that water enables more efficient travel compared to going over land.
Waterways are critically important to the transportation of people and
goods throughout the world. The complex network of connections between
coastal ports, inland ports, rail, air, and truck routes forms a
foundation of material economic wealth worldwide.

Within the United States, waterways have been developed and integrated
into a world-class transportation system that has been instrumental in the
country’s economic development. Today, there are more than 17,700
kilometers of commercially important navigation channels in the lower 48
states.

Early History of Water-based Transportation

The historical development of water-based transportation is connected to
the importance of domestic and international trade. Early exploration of
North America identified large amounts of natural resources such as
fisheries, timber, and furs. Trade centers were established along the
east coast of North America

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