Homemade autopilot/transmitter switcher

Hello.

I'm building and programming my own UAV using an Arduino Duemilanove. Yesterday I made a leap and the board is now controlling the servos and with fake position (no GPS connected yet) it tries to turn the plane to the right direction. 

 

The maid

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Engine and prop for Predator

I'm considering buying a Predator from Verticalhobby but I don't really now what engine I should use. I'm not all that interesting in flying this by my self since it is supposed to be an autonomous vehicle in the future. I'm looking for something pre

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