[jthomaslm]

Love the enthusiasm - it's definitely a very fun project to be working on!

Discussed a few of your questions elsewhere in the comments, but here are some thoughts on scaling laws:

Over-simplifying a bit for the sake of brevity: In general, for larger aircraft structural mass scales up more quickly than wing area (check out “indoor free flight models”). By using a span-loaded structure (i.e. having weight distributed along the wing span to match the way lift is spread over the wing) you can avoid some of these constraints and have an approximately constant structural mass fraction.

The aircraft is actually very quiet - it needs to be very aerodynamically efficient so it doesn't require much thrust. You can’t really hear it in flight, but I’m no audio engineer - so I don't know how useful microphones would be. Genuinely curious about this so if you have any pointers let me know!