The rotors provide lift to keep them up.
They can stay air-born indefinitely - provided there are enough thermal air-currents to keep them aloft.
Helicopter flight schools offer a great training program to get you in the air. Wings Aloft is said to be a great place to learn the basics of flying.
A plane with no engine is a glider. They use the air currents to stay aloft.
A helicopter can stay in the air until it runs out of fule,oil etc. Or until the engine has some sort of failure ex. like it over heats.
Nope. they use a tow plane to get airborne and then ride the air currents to stay aloft.
The question is not well-formed. Similar questions may include: How many minutes does a helium balloon stay aloft? How long does a hot air balloon stay aloft? How long does a particular rocket motor burn?
no NO PLANE CAN STAY IN AIR EXPECT HELICOPTER JUST BECAUSE OF HIS WINGS
The spinning rotor lifts it. The rear rotor stabilises it.
Because the air gets thinner with more altitude, and at some point the thin air can no longer give enough lift for airplanes to stay aloft.
Cold air aloft is associated with a surface low pressure system. The reverse is true for warm air aloft. In a baroclinic low pressure system, the upper-level low/trough is usually situated over the cold air, while upper level highs/ridges are around warm air aloft.
Trial and error. There are many different ways to make a paper aeroplane - some may be better than others.
some toilets use air power to flush.A2. Most aircraft need moving air to stay aloft. They move relative to the air, which in mechanics, is the same thing.