No they do not. Only military and government planes do this. Commercial airlines will land at an airport to refuel.
Airplanes refuel in the ground. Trucks carrying airplane fuel come and refuel the aircraft.Some jet aircraft have the capability of refuelling in the air.
Aircraft built by the military to refuel other capable aircraft (other military craft basically) in midair.
yes, you can buy an extra refuel tank ( is like a big bag ) and sit it in the interior of the aircraft, of course you will need extra room behind you.
Not a good idea, as the fuel is considered contaminated. The fuel is usually recycled.
The LCC-airlines are trying to refuel in 25 minutes, and charter on 60 minutes. Remember that an aircraft also need catering, lavatory and water services, air conditioning ++, so the refueling takes as long time as the plane is on the ground. I think you might have seen the handling agents connect the aircraft to the fueling system before the passengers even have get off, and the last thing they do before push-back is to connect from the aircraft from the fueling pump. For short flights, it doesn't need to take long ti refuel, because the aircraft will have much left from the previous refueling, so that can go fast. On IC-flights, it can take 1 hour ++. Hoped it helped! Sincerly, Handling Supervisor at Gardermoen Airport, Oslo (OSL)
50 feet with engines off.
Yes
to be fair it all depends on the size of the aircraft. a Hercules could but it is slightly smaller than your average civil aircraft. i would suppose so yes. yes its possible
Separation Valve
The same way they would fly from New York to Los Angeles. If they were attempting to fly around the world this would require in-flight refueling or they will have to stop and refuel.
They haft to refuel the plane so it can make it to Italy.......