barrage
Blimps
It leaves 18 balloons.
Yes. In WW2 barrage balloons were used to protect cities from aircraft bombardment.
gravitetion and science of aircraft
Weather balloons are sometimes used to obtain meteorological data from high altitudes.
The barrage balloon was simply a bag of lighter-than-air gas attached to a steel cable anchored to the ground. The balloon could be raised or lowered to the desired altitude by means of a winch. Its purpose was ingenuous: to deny low-level airspace to enemy aircraft. This simple mission provided three major benefits: (1) it forced aircraft to higher altitudes, thereby decreasing surprise and bombing accuracy; (2) it enhanced ground-based air defenses and the ability of fighters to acquire targets,since intruding aircraft were limited in altitudes and direction: and (3) the cable presented a definite mental and material hazard to pilots. Many people think that a barrage balloon system was designed to snare aircraft like a spider web capturing unwary flies. Not so. Any airplanes caught in these aerial nets were a bonus; the real objective of the balloons was to deny low-altitude flight to the enemy. Mindful of these capabilities, the British saw the barrage balloon as a viable means to counter low-level attackers during the world wars.
Yes, airplanes are aircraft. However, not all aircraft are airplanes. Helicopters, blimps, and balloons are aircraft- but they are not airplanes. Airplanes are generally fixed wing machines that move through the air.
They fly into the stratosphere. Weather balloons can reach altitudes of 40 kilometers (about 25 miles).
Gliders and hot air balloons have no engines. (also paper darts, if you count them!)Gliders
Aircraft, such as aeroplanes, hot air balloons, helicopters etc are used for many different things. Often they are used for recreational purposes. Some aircraft, such as fighter jets or helicopters such as the Apache are used in warfare, both to fight and to transport weapons, food and troops. Some balloons are also used as scientific researching devices such meterology balloons.
No. A barometercan only take measurements from its own location, and barometric pressure alone is not enough to track storm activity. Weather balloons or planes with packages of instruments are needed to take readings from different altitudes.
There are various types of air transportation such as commercial aircraft, privet planes, amphibious aircraft, helicopters, lighter than aircraft, hot air balloons, blimps, zeppelins, airplanes, and rockets.