Have just maidened the Speedy Red Midi Wing (https://www.thingiverse.com/thing:2386440). It’s a plank wing with a 1m wingspan.
Printed it with LW PLA. The prints were excellent – essentially no stringing at all when printing the wing sections. Fuse sections had some stringing, but no worse than Eclipson fuse sections.
Some print settings on my Ender 3 using Cura 4.4.0 are:
0.3mm layer height
0.4mm nozzle
260deg nozzle
65deg bed
52.5% flow rate
1.5mm retraction at 20mm/s
20mm/s print speed
Completed the build with the following:
2205/2300KV quad motor with a 7×3.5 prop
30A ESC
2X 9g MG servos
Balances well with approx. 1000mAh 3S battery. AUW is 450g – this is about half that published for the plane printed with normal PLA. CG is 35mm from LE. I have added a little reflex (a few mm) for launches/landings and slow flight, but switch to less reflex for faster flight.
This is an awesome plane to fly! Hand launches are stress-free, and landings are slow and stable.
I haven’t used any CF tubing. The wings have a bit of flex, but even at reasonable speeds and with some tight loops/Immelmans/etc, the wings seem fine.
I’m very pleased with this plane. The prints and assembly were easy, and it’s flies really well!
