TY91-style COM

A compact COM control head in the style of Trig's TC90 for the TY91, with a blue LCD showing active over standby. MEM browses the frequencies of the airports around and nine memories into the standby; MON shows dual watch. Comes as COM 1 or COM 2.

Modeled on: Trig TY91 (TC90 control head)-style COM
Category: Radios and panels
Size: 1 cell
Version: 1.0 · 2026-10-19
Plan: Pro
Simulators: MSFS 2020 · MSFS 2024 · X-Plane 11 · X-Plane 12

Variants

COM 1v1.0

Tunes and shows COM 1

Picker: RADIO > COM 1

COM 2v1.0

Tunes and shows COM 2

Picker: RADIO > COM 2

Features

LCD: the active over the standby, the step (8.33k / 25k) at the bottom right, SQ when automatic squelch is on
TX in reverse video while transmitting, RX while receiving; +2 while monitoring (dual watch)
MEM: GPS entries (each nearby airport's frequencies with ident and type) then Mem 1-9, each tuned into the standby as you browse
MEM held stores the active in the memory shown (or the next free one)
MON held opens the configuration (intercom, AUX, sidetone, squelch, 8.33 kHz, brightness) with a bar graph (display only)
Display dark without avionics power; dimmed at night, faceplate under the red flood light

On the iPad

Drag the dual knob: outer MHz, inner kHz; in MEM outer jumps airport to airport, inner steps through entries; in the configuration outer picks, inner sets
Push the dual knob (PUSH STEP) to toggle the 8.33 / 25 kHz indication
Tap the down / up arrow key to swap active and standby (leaves MEM)
Tap MEM to browse memories (again to leave); hold to store the active
Tap MON for dual watch (+2); hold for the configuration
Push the SQ knob to toggle automatic squelch (display only)

Settings

Which radio: COM 1 or COM 2 (picker variant)
In-unit configuration items have no simulator effect

Keys and controllers

Map any of these to a key, a game controller's button or axis, or a MIDI knob (how):

COM 1 MHz +
COM 1 MHz -
COM 1 channel +
COM 1 channel -
COM 1 swap

Simulator data

What the Hub reads from the simulator for this instrument, and what the instrument sends back. Names are the simulators' own: MSFS SimVars and events, X-Plane datarefs and commands.

Reads

Value	MSFS	X-Plane
COM1 active frequency (kHz)	`COM ACTIVE FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/com1_frequency_hz_833`
COM1 standby frequency (kHz)	`COM STANDBY FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/com1_standby_frequency_hz_833`
COM2 active frequency (kHz)	`COM ACTIVE FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/com2_frequency_hz_833`
COM2 standby frequency (kHz)	`COM STANDBY FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/com2_standby_frequency_hz_833`
COM transmitting: 1, 2, 0 none (enum)	`COM TRANSMIT:1 (bool)COM TRANSMIT:2 (bool)`	`sim/cockpit2/radios/actuators/audio_com_selection`
COM1 heard (1/0) (bool)	`COM RECEIVE:1 (bool)`	`sim/cockpit2/radios/actuators/audio_selection_com1`
COM2 heard (1/0) (bool)	`COM RECEIVE:2 (bool)`	`sim/cockpit2/radios/actuators/audio_selection_com2`
Aircraft latitude (deg)	`PLANE LATITUDE (degrees)`	`sim/flightmodel/position/latitude`
Aircraft longitude (deg)	`PLANE LONGITUDE (degrees)`	`sim/flightmodel/position/longitude`

Sends

When you…	MSFS	X-Plane
Dual knob (com1 MHz, com1 + 1 channel), swap key (com1 + 2), MEM entries tuned into the standby; com2 on COM 2	`COM_STBY_RADIO_SET_HZCOM_STBY_RADIO_SWAP`	`sim/cockpit2/radios/actuators/com1_standby_frequency_hz_833sim/radios/com1_standy_flip`

Add-on aircraft with their own systems may use other variables; the Hub reads the standard ones.