All world countries use the helicopter for rescue operations an for agriculture processes and many useful objects for all people ,
Here my new invention about using a new designed propeller for helping the main one.
As you see about the existing in use design depends on one main big propeller and another for direction control.
This addtional propeller works as assistance for the main one or backup at emergency for saving the people until successful landing and repair.
It can help all world countries and people
For useful processes like rescue operatoins and agriculture and transport and many useful things
