Concorde fuselage

[Lukas Programme]

Hello!

I've been running the Concorde script from the regression folder and wanted to display it with OpenVSP. The tail looks somehow odd (see picture). In the paper MacDonald, Botero et al. 2017  "SUAVE: An Open-Source Environment Enabling Unconventional Vehicle Designs through Higher Fidelity" the tail is much more pointy.

I already altered the parameter fuselage.fineness.tail, but it didn't lead to a more pointy tail.

Where could the error come from?

I also didn't understand why the position of the first nacelle defined by nacelle.origin = [[36.56, 22, -1.9]]  is located elsewhere than the other three.

Thanks in advance!

Lukas

[Emilio]

Hi Lukas,

The fuselage is a plotting artifact from going to OpenVSP that doesn't affect the result. The nacelle is clearly a typo. This is not the model that was used in the paper.

To get a pointy fuselage in OpenVSP you have two options, first is to provide segments to the fuselage. The second is to use some custom VSP settings. Not sure if these are the exact ones from the paper but would provide a good starting point.

    fuselage.OpenVSP_values = Data() # VSP uses degrees directly
   
    fuselage.OpenVSP_values.nose = Data()
    fuselage.OpenVSP_values.nose.top = Data()
    fuselage.OpenVSP_values.nose.side = Data()
    fuselage.OpenVSP_values.nose.top.angle = 20.0
    fuselage.OpenVSP_values.nose.top.strength = 0.75
    fuselage.OpenVSP_values.nose.side.angle = 20.0
    fuselage.OpenVSP_values.nose.side.strength = 0.75  
    fuselage.OpenVSP_values.nose.TB_Sym = True
    fuselage.OpenVSP_values.nose.z_pos = -.01
   
    fuselage.OpenVSP_values.tail = Data()
    fuselage.OpenVSP_values.tail.top = Data()
    fuselage.OpenVSP_values.tail.side = Data()    
    fuselage.OpenVSP_values.tail.bottom = Data()
    fuselage.OpenVSP_values.tail.top.angle = 0.0
    fuselage.OpenVSP_values.tail.top.strength = 0.0 

-Emilio