How to obtain a traditional helicopter mannul about DD tail?

Hello, erveryone!

I can browse the wiki website, and find traditional helicpter guides, but I need an tranditional helicopter mannul about DD(DirectDrive) tail rotor. where can I have it?

It is appreciate if you can give me a mannul about DD(DirectDrive) tail rotor.

My email address´╝Ügaojizhong@163.com.

Welcome to email me to give me the helicopter mannul!

Thank you very much!