TACANs like that at Nellis AFB on channel 12 (1036 MHz) do not work on the Aerofly F-18. 17X 1041 MHz TACAN /108.00 MHz VOR-DME is the lowest TACAN with a civilian use paired DME frequency.
(The 108.20 MHz VOR-DME at Durango near Telluride with a channel 19 pairing works as Ch 19 with the Aerofly F-18).
The F-18 airbrake operated from a joystick button only, with no slider axis in use, is very slow to extend, it retracts quickly.