They tilt the hub down at front, this makes the thrust go backwards.
Helicopters are not like airplanes. They hover up and start to move forward.They do not take off like airplanes.So they do not move slowly before taking off.
Density is a measure of the amount of atoms of an object per unit of space. Thurst is the remains of a fallen roof in a mine shaft.
for the thrill or thurst of it
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No, birds cannot hover in place like helicopters. Helicopters use rotors to generate lift and stay in one spot, while birds rely on flapping their wings to stay airborne and move forward.
Helicopters has a limited range compared to planes. Planes need a long pave to operate while helicopters can take off and land a lot more places. Also helicopters can "stand still" in the air while planes need to move all the time. So depending on what you want to do they have different (dis)advantages.
gives it thrust to help airlift
Planes, helicopters, paper airplanes, kites, and birds are objects that can move through the air. They utilize various aerodynamic principles to achieve flight.
They fly helicopters.
Abdul Sttar Edhi; assisted by his wife Bilqees Edhi
Helicopters are about 200 feet
A group of helicopters.