T still does what it's always done, even in 1.16.2. It's 'force trim' like in a helo with a long pole cyclic... similar to the trimmer button in DCS BS and using the CWS AP button in X-Plane (or controls magnetic lock button for X-Plane helos without AFCS or AP). The biggest difference with EECH's, though, is you don't hold it when you maneuver and then release when you have the attitude you want, rather you maneuver in EECH with whatever background trim you've got and instead just tap the force trimmer button again when you have the combined cyclic input (prior and new together) you want the sim to hold in the background. This means it's technically an additive force trimmer or attitude designation button... the latter with the caveat that you can trim in a continuous rate rather than an actual attitude if that's what's going on at the moment you tap it. As Andy said, shift + T clears it which means it reverts to canned omnipotent perfect wings leveling like Comanche Gold.
There is also the ability to do cyclic axis fine trimming in EECH now by just tapping the keyboard main arrow keys a lot that you can assign to a hat. Cobra-Zulu/Viper actually has a trim hat on its side hydraulic cyclic that's often flown with when manual attitude hold is activated, but I believe the Apache lacks a trimmer hat.
If you don't have a FFB stick or a long pole cyclic (i.e. you own a normal spring-loaded deflection joystick or pressure stick) and also you don't want to be bothered with manually forcing trim or a trimmer hat, I recommend people install a PPJoy virtual joystick and use GlovePIE instead for auto-trimming scripts... more like the real Comanche, and also like Janes Longbow Anthology. I believe there was a setting in the Gunship! ini or config file to also get that one to do the attitude hold automatically and you command the temporary rotation rate with your stick inputs (you put some value at 0 or 1 or something from its default). This is one of my beefs with DCS helos: most people are using centering joysticks at home and no such joysticks in real helos require a trimmer button. The experimental ADOCS, Comanche, the Raider, and the envisioned Invictus are all side deflection or pressure sticks with rate-command / attitude-hold and maybe optional wings leveling or velocity command/hold modes. No one flies a real helo with a stick where they hold or tap a button then release the stick back to center or zero pressure while it either bobbles with the extra input or blanks input until re-center or zero pressure. It's frankly a half-@ssed solution to an issue that was long addressed with far superior results to long pole cyclics or FFB, and is the primary method used for newer AFCS helos. To be fair to DCS, though, the Dodosim 206 for FSX trimmer button is probably the worst such implementation, but it's easy enough to code a manual trimmer script in GlovePIE for the Dodosim just as good as DCS's default one and the Dodosim is still otherwise the best helo for FSX I can find.
Last edited by Reticuli; 05/06/21 10:03 PM.