Tethered Drone from Car Battery

I am looking for some one with electrical engineering background built step down transformer for Tethering drone. The power source is Car battery. I will provide the equipment required to build.

See the below link for more details.
Ramesh 
http://diydro

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need help programming my turnigy 9x.

i am a rookie flyer and have absolutely no clue regarding how to program my radio tx to fly the apm 2.5 powered quad rotor. my configuration is 4 1200kv motors,30 amp esc, apm 2.5 flight control board. turnigy 9x tx/rx on a hiller x525 quad frame. 

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