Reversible propellers have a discing/zero thrust pitch which is different for

every model. Pilots use beta range to adjust their taxi speed. The RPM should

begin from idle and increase up to a certain limit (95% for the PT6 engines).

What I see in MSFS is that initially my RPM decreases and then starts going up

to the limit I set in the prop tables. As an example, for the Kodiak, we have

the following reference values: *Low idle RPM: 1080 +/-20***Prohibited
Prop Operation RPM: 450-1050**

**What I’m**

*Max reverse prop RPM: 2090*getting in the sim:

*Low idle RPM: 1080 +/-20*

**Minimum RPM during beta**

cycle: 790cycle: 790

**Max reverse prop RPM: 2090**In the MSFS debug tools I

observed that when the propeller beta is between beta_min and reverse, power

absorbed and efficiency revert to a hardcoded 0.1 which leads to unrealistic

RPM (and thrust). The propeller decreases speed and almost always enters

underspeed mode. I am using legacy tables and even though I can explicitly set

the Cp and n, both are completely ignored and the sim reverts to these default

values.

**So it would be great if this hardcoded behaviour is removed in one**

of the next sim updates, which will allow us to flesh out our propellers and

turboprops fully.of the next sim updates, which will allow us to flesh out our propellers and

turboprops fully.