The Crane includes provisions for mounting a DJI/Caddx digital FPV system or traditional analog. We built ours with DJI and it was an absolute blast to fly. There is also an option for no FPV.
The highlight of the Crane - The use of 6 digit laminar flow airfoils on both the wings and stabs. The root of the wing features a NACA 63412 a=1.0, which morphs into a NACA 63410 a=1.0 and ultimately becomes a NACA 0010 at the very tip. The stabs on the V-tail are a NACA 63010 a=1.0
Huge thanks to Conor C for beta testing and printing the Crane alongside us! We had a lot of fun wiring and flying it together
Spars
(2) 8x1000mm (main wing spars)
(2) 4x600mm (flap/aileron hinge)
(2) 2x200 (wingtip)
(2) 4x400 (wingtip)
(2) 4x200 (vtail)
(2) 2x200 (vtail control surface hinge)
(2) 4x400 (fuselage floor - optional)
Materials
Polycarbonate or other high-temp filament for the motor mount and wing bay plates
Medium CA glue
6x3mm magnets for the canopy and hatch
M3 threaded inserts (~6mm height)
M3 bolts of various sizes
220x220x220 minimum size print bed (Ender 3)
Control horns (this one)
Tips & Tricks
Recommended electronics:
Video: DJI or analog 1.2/5.8ghz
Control link: Dragonlink / TBS crossfire / ELRS
Motor: Crane supports a wide range from 2212 to 3510. We used a 3510 700kv motor
Prop: 9/10/11/12x8.5 or 13x7 folding prop. We used a 12x8.5 folding APC prop
Battery: 4000mah 4S Lipo / 4S2P 7000mah to 4S3P 10500mah or similar
Flight controller running Ardupilot (such as Matek F405-WTE)
Matek M8Q-5883 GPS
Blheli 35a ESC (lighter the better)
Emax ES08maii servos (for wire clearance)
Print settings
Single wall
4 top/bottom layers
0.3mm layer height
3% cubic subdivision infill
Avoid warping by using a glass bed + glue stick
Set horizontal hole expansion setting correctly (try 0.25) for spar fitment
NO supports needed!
Other recommendations
Land with half flaps - full flaps hinders pitch authority ever so slightly at low airspeeds
Autotune or bump PIDs significantly for snappy performance
Aim for an AUW between 1.6kg and 3kg
Place CG 52-57mm from leading edge (wing is marked at 55mm underneath)
Give it a nice run up + hard throw into the wind on launch
Reinforcement
Apply rubberized tape / duct tape to the bottom of the fuselage for protection against harsh landings
Brush epoxy on the nose area of the fuselage to reinforce it for landings
Additional Info
Wingspan: 2200mm
Wing area: 3250cm^2
Max takeoff weight: 3kg
Fuse3.stl has been updated as of 1/16/22. Please download it here
Licensed under the Creative Commons - Attribution - Non-Commercial license.