When I run the motor calculators, often there is a warning when I run my setup and others: I actually just ran the program for an 18x12 and got this warning even on 1S and 800rpm, so now I wonder what it actually means. I also run the program on other (successful) setups and get the same warning.

What does it mean? Does anyone experience this in flight?

Also wondering what the correlation is between "Static Thrust" and "Prop Stall Thrust".

Thanks

Joe,

My crude understanding is something like this -

Static thrust is simply the amount of thrust without any forward movement of the propeller. Assuming the propeller is not stalled, the thrust produced is generally the greatest when static. If the prop is stalled (when static), it will not produce as much thrust, and the amount of thrust will increase when sufficient forward motion occurs, allowing the prop to unstall. The biggest reason we care about this, is that amps will be lower when the prop is stalled, and can (likely) increase when the prop has enough forward motion to become unstalled.

Higher pitched props are more likely to be stalled when static.

I believe prop stall thrust is the maximum thrust produced by the prop prior to it stalling. This may or may not occur when static.

Regards,