Testing sim/aircraft/view/acf_asi_kts now.
EDIT: sim/aircraft/view/acf_asi_kts stays at 1 for all planes. Seems to be an enum from the description. Will look further into it.
As for the change, I had changed to indicated airspeed, but have held back the release because the change introduced a new bug.
Namely that failures on the pitot tube will kill the forces on the yoke.
So I am trying to get a better solution from the community,
before I allow choosing between TAS and IAS as a last solution.