Thanks @Dav-25 ! I am baking in some defaults to my code, which efoil builders can get from my preset dropdown.
There are 4 different things my program will produce:
*. foil sections (for the “lifting” foil wings, and for the low-drag strut)
*. shroud for the prop (with optional lifting effect)
*. prop itself
*. cowling - the nose for the motor, and tail after the prop
I want to supply some as-close-to-real defaults as possible for each of the above. Your insight into the prop conditions is excellent - I probably would not have thought of that. I’m using the combination of “turbulence” and “finish” to derive the flow separation criticality - it just seemed easier to ask users “real questions” than ask them for an arbitrary number they won’t understand…
These are my defaults for the foil section and strut:
‘turbulence’: (Laminar, Average, Turbulent
‘finish’: (Rough, Average, Clean, Very smooth)
Do they look sensible to you? My plan for the mass option is to tell them the chord if they tell me the length, so the foil is the perfect size for them (optimal performance for their weight). If they leave that out, they’ll need to hope they picked a suitable chord and span themselves.
What is a typical span and chord of a front foil on an efoil, do you know?