Control maps

The pilot has four controls:

Channel	Range	What it is
Collective	0 … 1	Lever down … up
Long (longitudinal cyclic)	−1 … +1	Stick back … forward
Lat (lateral cyclic)	−1 … +1	Stick left … right
Yaw (pedals)	−1 … +1	Left pedal … right pedal

Each rotor's Control Map mixes those four into that rotor's own collective, long and lat:

rotor collective = Collective From Collective × collective + Collective From Long × long
                 + Collective From Lat × lat + Collective From Yaw × yaw + Collective Bias      (clamped 0…1)
rotor long       = Long From Collective × collective + Long From Long × long + … + Long Bias    (clamped −1…1)
rotor lat        = Lat From … (same pattern)                                                   (clamped −1…1)

If you leave the map empty, you get collective to collective, long to long, lat to lat and no yaw. That's what a normal main rotor wants. Setting a rotor's Role does not make a map for you though, so every tail or secondary rotor needs one.

Starting maps for each layout. The signs here are a starting guess, so confirm them with the ground test:

Layout	Rotor	Non-zero entries
Main + tail (anticlockwise main)	tail	Collective From Collective 0, Collective From Yaw −0.5, Collective Bias 0.5, Long From Long 0, Lat From Lat 0
Main + tail (clockwise main)	tail	same, but Collective From Yaw +0.5
Tandem	front	Collective From Collective 1, Collective From Long −0.15, Lat From Lat 1, Lat From Yaw +0.3, Long From Long 0
	rear	Collective From Collective 1, Collective From Long +0.15, Lat From Lat 1, Lat From Yaw −0.3, Long From Long 0
Coaxial	upper	defaults + Collective From Yaw +0.08
	lower	defaults + Collective From Yaw −0.08

Three-point pedal curve. If the tail rotor's neutral pitch isn't halfway between its limits, one gain and bias can't hit both pedal stops. Turn on Use Yaw Collective Curve and type in the rotor collective at full left pedal (Collective At Yaw Minus One), centre and full right. The Mi-8 uses 0 / 0.428 / 1.

Ambient pedal limiter. The Mi-8's tail rotor has a stop that moves with air pressure and temperature, and Use Ambient Positive Yaw Endpoint Limiter copies that. Leave it off unless your aircraft actually has one.

Scheduled cyclic trim (LCT). Tandems like the Chinook tilt both swashplates forward with airspeed (longitudinal cyclic trim), so the fuselage doesn't end up nose-down at speed. Turn on Use Scheduled Long Bias on a rotor's control map and give it airspeed breakpoints in knots (Scheduled Long Bias Ias Kt) and the cyclic bias at each one (Scheduled Long Bias, normalized cyclic, + is forward). Scheduled Long Bias Kt Per 1000 Ft slides the schedule to lower airspeed with height (the CH-47D chart is about 3.5), Scheduled Long Bias Ground is where it sits on the ground, and Scheduled Long Bias Rate is how fast the actuator moves. Each rotor gets its own schedule (the real aft rotor moves further than the front). It goes on top of that rotor's mixed cyclic, so it isn't one of the pilot's four controls.