I use a Spektrum DX9 transmitter to Fly RC models on my computer. The connection between this transmitter and and USB port is achieved wireless by a RX2SIM Wireless Multi-Sim Adapter (USB2SYS) from RCware together with a Spektrum AR610 receiver. For RC simulation of helicopters I using the HeliX simulator and for Airplanes I use Aerofly RC8.
Aerofly RC8: www.ikarus.net/en/rc8-features/ Youtube: watch?v=TxKbFo85qD0
Flying in Aerofly RC7 with ME109 at Bennet Flying Field Nevada