Excellent work and very useful thank you..
A question though - I have unlocked the sheet to look at the formulae and wonder how you arrived at those for materials cost and build time, also am I right in thinking those would be for composite sandwich construction?
I am going to try and compile a database of similar designs which can be linked from another sheet within the workbook - perhaps this could be a collaboration from the group too - although I will kick it off, time permitting...
I also have the thought to try - although I am not sure it is 'doable' - to add scantlings to the 'parameter' sheet for various regulating bodies.
Once again thank you for sharing this
Kind regards Andy