Ultimate helicopter physics UNITY3D

This is a tool that can be used to create any type helicopter Physics, support any type of propeller and it is also combat ready (i.e) there is a built-in gun and missle Control, the well organised inspector makes it easier for Devs come with varieties of copter by just tweaking the values
please read
Documentation
controls:

H to descend
study controls before you Play demo
-have doubts try demo out (PC build)
Physics_1

Physics_2

Physics_3
Features
-it Can make use of its own wheel Physics or the built-in unity wheel Collider
-it does not difile the Unity3d Physics system (meaning: it makes use of unity relativeTorque and relativeforce in other to give that realistic helicopter feel)
-uses Unity3d rigid body system
-able to clamp rotation on individual Axis or set free Axis
-tweak yaw and tilt Angle
-Airdrag
-Apply drag to individual Axis rotation
-realistic proppeller system (ANY KIND).