Medium twin on wheels

UH-60, Mi-8/17, SA 330 Puma, NH90, AW139. Template: Mi-8MT.

This is what's different from the normal step-by-step conversion:

1. Topology. Copy the Mi-8's.
   • Two sources with the same Load Share Weight, the supervisor on, and your normal and contingency power fractions.
   • Put the main rotor inertia on shaft.main, and set the shaft.tail ratio and inertia.
2. Main rotor. Articulated. The Mi-8's values use every hub field, so they're a good reference.
   • UH-60: 4 blades, anticlockwise (−1), elastomeric articulated hub.
   • Puma: clockwise.
3. Tail rotor.
   • UH-60: canted about 20° (tilt the Shaft Axis up, like 0.94 0.34 0).
   • Mi-8 and Puma: flip the axis for a clockwise main rotor.
   • If the pedal's neutral pitch is off-centre, use the three-point yaw curve.
4. Wheels. Copy the Mi-8's struts and tires, and move every PointInfo onto your model.
   • Tricycle with a nose wheel (Mi-8): nose strut Steering Mode 1 (linked to the pedals) or 2 (free caster).
   • Tail wheel (UH-60): move the steerable strut to the back and use Steering Mode 2.
   • Mark the braked tires with Braked.
   • Twin wheels are just two tires with the same Strut Index.
5. Stabiliser. Fixed incidence (the PointInfo angle), or linked to a pilot control with the control-linked incidence fields (see Airframe aerodynamics). The UH-60's stabilator moves with airspeed, which RFM can't do yet. Pick its cruise angle and expect the nose to pitch up when you transition out of the hover, since a fixed stabiliser sits right in the rotor downwash at low speed.
6. Stability augmentation and autopilot. See Controls, flight assist, SAS and autopilot. The Mi-8's AP-34B cockpit buttons are just normal user actions, so they work on any aircraft.
7. Gauges. Most twins show torque in %. Set Torque Gauge Full Scale Psi to 100 for a % gauge (see Visuals, sound, gauges and displays). With Engine Zones, each engine can get damaged and fail on its own (see Damage, engine switches and rotor brake).