Helicopter design has changed every year. New components are used and new materials appear
Yes, helicopters were used in WW1. Don't be silly, helicopters were invented towards the end of WWII.
There were no helicopters in WW1
at least 10 from a total of 50 helicopters downed
Vertical Envelopment, or the use of helicopters in combat, was first introduced in the Korean war.
Soon after WW2 helicopters became very popular, reaching a peak of use in the Vietnam war, when the US Army and Marines had more helicopters than all the services regular airplanes
No, there were no helicopters 2,000 years ago
how did a fan change over the years
How did the train change over years?
Yes. Military helicopters have flown over Chicago for carrying the president and for the movie, Transformers 3.
over 1,000
how did the typewriter change over the years i would like to know answer.com please for my project
Helicopters can land on small ships, clearings in forest, on top of buildings etc. Airplanes can not do these things
By tilting the main rotor forward or backward.
Helicopters have improved and changed since they were first made. Many people and companies still work daily on improvements.
the computers have change a lot over the years
Yes it has
Only RC Helicopters can be flown at small age. That too is restricted to about 8 years. Real helicopters should only be flown by licensed pilots of age more than 18.