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Aircraft
An aircraft is any machine
capable of atmospheric
flight. A first division by
design among aircraft is
between lighter-than-air,
aerostat, and
heavier-than-air aircraft,
aerodyne. Examples of
... > full story
Automotive aerodynamics
Automotive aerodynamics is
the study of the
aerodynamics of road
vehicles. The main concerns
of automotive aerodynamics
are reducing drag, reducing
wind noise, and preventing
... > full story
Flexible-fuel vehicle
A flexible-fuel vehicle
(FFV) or dual-fuel vehicle
(also sometimes called only
flex-fuel) is an automobile
that can typically alternate
between two sources of fuel.
A common example is a
vehicle that can accept
... > full story
Alternative fuel vehicle
Alternative Fuel Vehicle
refers to a vehicle that
runs on a fuel other than
traditional gasoline or
diesel; any method of
powering an engine that does
not involve petroleum. Due
... > full story
Browse Reference Articles
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Cruise missile
A cruise missile is a guided missile which uses a lifting wing and most often a jet propulsion system to allow sustained flight. Cruise missiles are, in essence, unmanned aircraft. They are generally ... > more -
Military aviation
Military aviation is used to attack or defend a country through the sky. There are many types of military aircraft, but the basic types of military aircraft are bombers, fighters, Fighter bombers, ... > more -
Multistage rocket
A multistage (or multi-stage) rocket is, like any rocket, propelled by the recoil pressure of the burning gases it emits as it burns fuel. What characterizes it as "multi-stage" is that it ... > more -
Model rocket
Model rocketry is a hobby similar to building model airplanes. In the hobby today, there are two distinct areas of rocket activity: amateur (or experimental) rocketry, and model rocketry (including ... > more -
Aerodynamics
Aerodynamics (shaping of objects that affect the flow of air, liquid or gas) is a branch of fluid dynamics concerned with the study of forces and gas flows. The solution of an aerodynamic problem ... > more -
Energy and the Environment
Renewable Energy
Environmental Science
Fuel Cells
Alternative Fuels
Sustainability
Liquid nitrogen economy
A liquid nitrogen economy is a hypothetical proposal for a future economy in which the primary form of energy storage and transport is liquid nitrogen. It is proposed as an alternative to liquid ... > more -
Automobile emissions control
Automobile emissions control covers all the technologies that are employed to reduce the air pollution-causing emissions produced by ... > more -
Internal combustion engine
The internal combustion engine is a heat engine in which combustion occurs in a confined space called a combustion chamber. Combustion of a fuel creates high temperature/pressure gases, which are ... > more
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