Helicopter Gabriel 124

The need for the helicopter is that in 1972 Igor Sikorsky wanted to make a machine that could fly straight up or down with overhead blades. The helicopter can fly straight up or down. Also it can hover in on spot and it can land in a small space on the ground. It doesn’t use wings like airplanes. The need is to transport cargo and faster transportation.

sa-341

the process of the helicopter.

The process for the helicopter was that in 1972, Igor Sikorsky finally made vertical flight safe, practical and reliable. He learned that the helicopter needed power- to- ratio .It needed the right controls to be steered without catastrophic failures .It also needed a lightweight frame and wall to reduce vibrations .It needed counteract rotor to work.

Timeline 1: In, 1930 Harold pitcan made the ac-35 the changes were that the helicopter had both a wing and a rotor.

roger that!

Timeline 2: In, 1967 the French made the sa-341 the changes made were that it had tail rotor for the first time.

Robinson r22

douglas 500

Timeline 4: In, 1984 Mcdonnel Douglas made the ah-64 the changes made were that it had guns and rockets on it.

Timeline 5: In, 1991 Mcdonnel Douglas made the douglas 500 it had no tail rotor.

need for the helicopter.

Timeline 3: In ,1979 Robinson made the Robinson r22 the changes were that it reduced noise.

ac-35

Harold Pitcan

by Gabriel Room 124

Roger That!!! history of the helicopter

http://s011graym.edu.glogster.com/helicopter-gabriel-124/