▲ 30 r/3d_printed_RC_planes+2 crossposts

Hey everyone!
I'm 17 and designing this 1955mm wingspan UAV for a project to put in my profile, and it's going to be my first ever.
I know I should've gone for something small, but I felt like I'd be able to pull this off.

It's a twin-boom inverted V-tail pusher style UAV, and I want to integrate autopilot and GPS later on once I can prove it flies.

I'm trying to get the whole thing under 3 kilograms using pla-lw.

some specs:

wing:
root chord: 0.281m
tip chord: 0.163m
semispan (including body as the top is the same shape as the airfoil) : 0.977m
wing area: 0.449m^2 (both wings combined)

body:
length: 985mm
width: 232mm (widest point) and 158mm mostly other than nose and tail
height: 151mm (max)

this is designed for a min airspeed of 8.5m/s, and a cruise airspeed of 12m/s or more.
I went for a Selig S3021 airfoil, as it had the thickness I need to pass through carbon spars.

I'm going for a 1500mm 10x8 carbon fiber spar for the main wing, and 12mm spars for the support boom, which have a 1m moment arm from 20% chord, which should give me enough pitch sensitivity.

I'll be using a 12 inch prop with a 950kv 3536 outrunner brushless motor and an 8000 milliamp 3S LiPo battery.

my spec calculator gives me a 52 minute flight time and 37km calculated range if I follow the parameters that I used for that calculation.

I'm using the anycubic Vyper, which has a 245*245*260mm bed size (L*W*H) so I'll have to print a few parts diagonal. I want to know whether my parts can even be printed properly without facing structural issues.

It's still a rough model, and I have things that I need to improve or add on.. I hope the pros on this subreddit can help me out with picking parts such as servos (which im still having trouble with picking) , validating/invalidating my design and giving me more advice.

because I'm living in Japan, it's going to be hard for me to get into student groups and clubs, as they are rare, and mostly part of universities rather than common hobby spots, so this will be a solo project unfortunately.

as long as AliExpress exists, sourcing parts will not be hard for me, and things deliver quickly here.

I can send my fusion 360 design files or just a .step file to whoever is willing to help me out, and the calculator spreadsheet I'm using (which i got from a course that I did online)

and once again, thank you so much! I am more than willing to clarify any doubts that you guys may have about this!

(ill be posting this in other subreddits too)

u/dat-randomplaneguy22 — 1 month ago