OpenVSP Set Up for Propeller Modelling

[Babansoro Sanusi]

Hey dear, I will like to inquire in regards to the input variable for propeller modelling. so the Vinf when I select 0 for a static case, I get the NAN error. I tried a very low Vinf value for still facing in accurate result in respect to the experimental result, how ever when I use 3 m/s or 100 m/s, the result seems to make sence. so what happen when am going for cases without experimental cases especially optimization?. Can someone explain how do best select the initial values?. 

Also in regards to the pitch value eg a Prop9x6, I know how to integrate the 9 as diameter input, how about the pitch? how could I input that into the OpenVSP. 

Thirdly, when integrating calculation that contains the drone frame alongside actuators disk or propeller, how does openvsp consider the boundary conditions? are things like the downwash velocity of the forward propeller having any impact on the drone frame/body. The Cl, CD, values for a combine research is quite interesting, sometimes we get a large value for the coefficients or sometimes negative values, can someone explain to me what is going on? how do I improve the accuracy?. Thanks. 

[lzzha...@gmail.com]

Hi,  Babansoro

As for your second question, you can input the pitch angle in the propeller design tab. The Beta 3/4 means the blade pitch angle. Prop9×6 means the pitch is 6 inch, you should trans it to degrees. In this case, it equals 15.8°.

So, input the value in the box   Beta 3/4.

Yours

Long

[Babansoro Sanusi]

Thank you so the prompt response. 
It make sense now. In regards to the Vinf, do you suggest we put Vtip values in  it place instead or to maintain the default 3 m/s?. 
Though I think the result becomes abit off after 45,000 reynold number and 5000 RPM.