SU15 Beta: Where is the multi-rotor documentation?

[MSFS 2020] Bug Reports
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  • Added multi rotor support for helicopters (Chinook, dual rotor, etc.)

Hello. Where is the documentation? We find nothing here: SU15 Flighting information & release notes

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Bump. We are still looking for this documentation.

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Same here. Have a FM somewhat functioning but missing key parameters due to lack of documentation.

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Ka-10 waiting for upgrade

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SU15 launched today.

Over 3 months since a bug was logged and documentation is still seemingly not available? Am I missing it in the final docs?

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@davux3
Documentation for multirotor FM is available here: flight_model.cfg - [HELICOPTER]

However, I still find it nearly impossible to create a decent FM for a tandem rotor configuration. The cycl_y_on_cycl_y and cycl_y_on_collective introduce non-desired effects, such as a tendency to yaw upon pitch up/down

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Thanks, I did miss it. :slight_smile:

Applicable config:
cycl_y_on_cycl_y
cycl_y_on_collective
pedal_on_bank
pedal_on_cycl_x
pedal_on_collective

But it seems your thread here that the doc still isn’t quite enough: New tandem FM - Unable to keep it stable

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Not enough is putting it gently. It’s just incorrect, if you don’t know how this is supposed to work, you will definitely not learn from this description.

pedal_on_bank - Tandem Rotor layout (Chinook, Sea knight). Pedal input causes positive lateral cyclic in fwd rotor and negative lateral cyclic in aft rotor. Lateral cyclic differential between fwd and aft causes yaw

pedal_on_cyclic_x - Side-by-side twin rotor (Drache, Mil V-12). Pedal input causes positive longitudinal cyclic on left rotor and negative longitudinal cyclic on right rotor. Longitudinal cyclic differential between left and right rotor causes yaw.

pedal_on_collective - single mast coaxial (all kamov helicopters). Pedal input increases collective on clockwise rotor and reduces collective on counter-clockwise rotor, or vice versa. Collective differential results in torque induced yaw of one rotor being greater than that of the other, which causes yaw.

@EPellissier feel free to just copy this description into the docs so people can finally read something useful for a change.

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