Closed askprash closed 1 month ago
@ngomezve does this make sense to you?
A more "thorough" fix (probably later) would use the actual floor height and only add insulation for the portion of the cabin above the floor.
This is an improvement over the existing model. I agree that the insulated fraction parameter could be eliminated by using the actual cabin layout, but this is probably OK for now.
The insulation weight is estimated by assuming that some fraction (defaults to 55%) of the fuselage circle is part of the cabin and is insulated but the remaining 45% is part of the cargo hold that is not insulated.
The existing calculation looks like this: https://github.com/MIT-LAE/TASOPT.jl/blob/90a11ce611b7dee323d2b4dab7c57c618baf11e1/src/structures/fuseW.jl#L220-L224
Firstly, the 0.55 default factor implies it should be $2.2\theta$ not $2.0\theta$:
Winsul = Wppinsul*((1.1*pi+2.2*thetafb)*Rfuse*lshell + 0.55*(Snose+Sbulk))
Secondly, this does not actually take the perimeter correctly if there is a downward bubble shift.
Proposed fix is something like:
Fixing in #57