### vehicle | aircraft:

Airplane
* All airplanes follow the same laws of physics
  - have a limit to the amount of weight they can safely carry into the air
* Every airplane has a specific takeoff speed, where lift overcomes gravity.
* Make Markets.
* Many airplanes fly in the stratosphere, because it is very stable.
* Most airplanes also have flaps attached to the wings
  - are fixed wing
  - burn fossil fuel with air to get energy, but that has no future
* Most airplanes carry air cargo
  - fly in paths
* Most airplanes have computers
  - horizontal and vertical tails to make the airplane stable
  - instruments
* Most airplanes use combustion engines
  - gas turbines
  - internal combustion engines
* Some airplanes fly in stratosphere.
* Some airplanes have different types of propellers
  - lose power
  - reach ages
  - use propellers for the propulsion system instead of jets
* also create a great deal of pollution.
* also have wing flaps
  - provide platforms for remote sensing, and some sensors operate from land
* always try to take off and land into the wind.
* are aircrafts.
* are also good places to catch colds or the flu
  - notoriously dry environments
* are capable of bombs
  - crashs
  - near airports
  - stalls
  - taxis
  - designed to withstand even the most wicked of storms
  - films
* are located in air
  - aircraft carriers
  - hangars
  - skies
  - war
* are mechanical hawks
  - objects, subject to imperfections and faults
  - more expensive to purchase and maintain than automobiles
  - mutually interchangeable human flying tools
  - notorious for having high levels of positive ions
  - one of the worst places for people who have allergies
  - responsible for air, noise, and water pollution
  - safer because of their increased sophistication, newer power plants pollute less
  - tradeoffs in performance, time, and lifestyle
  - up in the air spreading sound waves
* are used for air transportation
  - flies
  - flight
  - traveling
  - warfare
  - vehicles
  - very top-heavy, so they tip easily
* cabins, for example, consist mostly of plastics, or polymers.
* can find their altitude by using air pressure
  - fly because the law of aerodynamics higher law than the law of gravity
  - only fly so fast and turn only so sharply
* come in many different shapes and sizes
  - shapes and sizes, but they all have similar parts
* come with manuals
  - their own call letters
* coming in to land often fly over car parks.
* connect distant points on the globe.
* contrails only form under certain conditions.
* crash down to earth when pilots and crews disappear.
* create dreams
  - thrust using propellers, jet engines , or rockets
* don t just go down at airports
  - take off until everyone is wearing seat belts
* drop toxic chemicals regularly from the air.
* expand horizons.
* fall from the sky.
* fly because their wings throw air downward
  - they push air down
  - between cities without having to pay for air space
* have a lot of surface area
  - major influence on lives' of society
  - maximum load they are capable of carrying safely
  - weight force, too
  - dual flight controls
  - strict weight and balance limits
  - two magnetos for safety reasons
  - wheels
  - bases
  - ceilings
* includes fuel gauges
  - pods
* includes gasoline gages
  - navigation light
  - radar domes
  - sections
  - the most expensive means of communication
* make noise that disturbs residents of homes near the flight path.
* move fast enough to get around bad weather
  - large numbers of business passengers or vacationers
  - very fast through the air
* need runways.
* often take off and land against the wind.
* produce huge amounts of greenhouse gas emissions.
* provide safe travel for two main reasons.
* regularly carry several hundred passengers.
* retract their landing gear in flight for the same reason.
* seek the widest areas to fly.
* slide from earth to air, bound for distant parts of a smaller world.
* sometimes crash, and it is always a shock to the system when one goes down
  - roar as they approach their runways
* stay up because air currents along the wings create pockets of no resistance, or vortexes
  - the wings move air downwards
  - in the air because they have wings
* still fly four to five times faster than zeppelins.
* take off by using full speed
  - horizontally and can move in a forward direction only
  - on angles
* takeoff and land at airports.
* use altimeters to estimate their height as well
  - areodynamics to make less drag and go faster
  - propellers or jet engines
* usually take off and land into the wind.
* watching popular pastime all over the world.
+ Altitude, Altitude in aviation and in spaceflight: Aviation :: Physical geography
  * Airplanes can find their altitude by using air pressure. This pressure can be measured and this can be converted into a height above sea level.
+ List of aviation terms, Aircraft
  * It has wings that do not move. The wings on some fixed wing aircraft can move a small distance but are generally fixed in one position. Most airplanes are fixed wing.
+ Wing, Artificial wings: Animal anatomy
  * Airplanes also have wings. Those wings cannot be moved, they are stable, but the wings also produce lift, so the airplane will get off the ground if you move it fast enough.