I used this;
http://www.maplin.co.uk/module.aspx?...23256&doy=10m4
Converts analogue potentiometer input to usb that Microsoft Flight sim recognises as joystick inputs.
Can use a maximum of 3 which gives 10 analogue and 12 switch inputs.
Use 1Megohm linear pots, which will = 250kohm over 70 degree turn for elevator/aileron/rudder and engine controls. As 1k seems to = 1 count on Microsoft Flight sim setup.
better still:
http://www.lbodnar.dsl.pipex.com/joystick/
More than enough inputs for the that 4 engined behemoth if you string them together.