Phatbob,
When I set up my F-15 Eagle, I put the air brake on a separate channel on my receiver and did some flap / aux mixing.
I have the flaps on a 3 position switch and the brake deploys at full flaps down. The brake closes on positions 1 & 2 for take off settings and flaps up.
I run a Spectrum DX-18 gen 1, but you should be able to do the same on a DX-9.
This is just my personal preference but here is a break down of how I set all my flight controls for all my EDFs:
1) Throttle
2) Aileron
3) Elevator
4) Rudder
5) Retracts
6) Flaps
7) Steering
8) Aux 1 / special feature { Air Brake }
9) Aux 2 / special feature
10) BEC / E-Fuel
11) expansion module out to channel 18
When I set up my F-15 Eagle, I put the air brake on a separate channel on my receiver and did some flap / aux mixing.
I have the flaps on a 3 position switch and the brake deploys at full flaps down. The brake closes on positions 1 & 2 for take off settings and flaps up.
I run a Spectrum DX-18 gen 1, but you should be able to do the same on a DX-9.
This is just my personal preference but here is a break down of how I set all my flight controls for all my EDFs:
1) Throttle
2) Aileron
3) Elevator
4) Rudder
5) Retracts
6) Flaps
7) Steering
8) Aux 1 / special feature { Air Brake }
9) Aux 2 / special feature
10) BEC / E-Fuel
11) expansion module out to channel 18
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