TROY'S 3D PRINTED RC DC-6/DC-7 AIRLINER

This is a RC DC-6 Airliner that flies very well on 4x 2212 1400Kv brushless motors using 4s or 3s lipo batteries.

Build Volume required for this airplane is 200x200x200.

RTF weight: 3,600g
Wingspan: 1.8m
Length: 1.6m
Print time: 150hrs
2kg of PLA

I have a full step by step assemble guide on my YouTube channel.
https://www.youtube.com/watch?v=Vp3yEOzvFtg

Here is an rcgroups build thread:
https://www.rcgroups.com/forums/showthread.php?4266059-Troy-s-3d-printed-rc-dc-6-dc-7-airliner#post50326309

This plane has flaps and retractable landing gear. I designed this to use a 6ch receiver. A key feature that allows this to happen are the special design of the servo brackets that allow you to mount the servos in any orientation. This makes it possible to use a y harness to connect all the control surfaces.

You can print this with regular PLA and get a ready to fly weight of 3600 grams. I do not use any carbon fiber rods in this build to make it easy to source the parts required. There is a spar intentionally designed into the wing sections, that make it very strong.

*If you would like to print the wing using LW-PLA it will save around 400grams, but it is not required. I have not flown it in LW-PLA, but I designed it with LW-PLA in mind. Printing it fully out of PLA shows how well it flies with that additional weight. I would still print the fuselage out of regular PLA, the fuselage is already very lightweight using PLA.

I have a complete list of parts required for this build on my YouTube assembly guide.

Here is a link to the Decals:
https://cults3d.com/en/3d-model/gadget/dc-6-dc-7-doos-and-window-decal-file

All The Fuselage Parts are designed with a 15mm ring this is a key feature for strength so before you print the parts make sure this ring shows up on your slicer software.

Fuselage 1-8 Print will 15mm ring on the build plate. Set the Extruder closer than standard to the bed. This is also referred to as Z-Offset, I set mine up so the extruder is almost touching the bed. The first layer will print on the bed without the 15mm ring, the second layer will start a 15mm ring. You want the second layer to adhere to the bed, the first layer does not matter.

Fuselage 1-8
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 4
Initial Bottom Layer - 0
Extra Skin Wall Count - 5
Skin Removal Width - 2.6mm
Infill Density - 0%
Surface Mode - Normal
Build Plate Adhesion Type - None

Fuselage 3:
Support: Normal
Overhang: 50%
Pattern: ZigZag
Density: 15%

Fuselage 9:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 4
Bottom Layer - 0
Initial Bottom Layer - 0
Infill - 0
Surface Mode - Normal

Center Wing 1, Left & Right Wing 1-5:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 0
Initial Bottom Layer - 0
Infill - 0
Surface Mode - Normal

Center Wing 2:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 4
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 0
Surface Mode - Normal

Left & Right Ailerons 1, Flaps 1, Elevator 1,Ruder1:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 0
Surface Mode - Normal

Left & Right | Ailerons 2,3, Flaps 2, Elevator 2,Ruder 2,Horizontal Stabilizer 1 & 2,Vertical Stabilizer:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 0
Initial Bottom Layer - 0
Infill - 0
Surface Mode - Normal

Left & Right Flap 3:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 4
Bottom Layer - 0
Initial Bottom Layer - 0
Extra Skin Wall Count - 0
Infill - 0
Surface Mode - Normal

Motor Mount ABS:
Print Temp - 235c
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 5
Top Layer - 5
Bottom Layer - 5
Initial Bottom Layer - 5
Infill - 25%
Surface Mode - Normal

Cowl:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 0
Surface Mode - Normal

Pratt&Whitney Engine:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 2
Top Layer - 3
Bottom Layer - 3
Initial Bottom Layer - 3
Infill - 0
Surface Mode - Normal

Right/Left Outer & Inner Nacelle: the part that connects two the wing
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 0
Surface Mode - Normal
Skin Removal Width - 2.5mm

Right/Left Nacelle:the part closes to the cowl
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 0
Bottom Layer - 4
Initial Bottom Layer - 0
Infill - 0
Surface Mode - Normal

Nose Gear, TPU Hinge, Control Horns, Flap Horns, Servo Mount:
Infill - 100%

Battery Tray:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 5
Top Layer - 6
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 8% Grid
Surface Mode - Normal

Battery Hatch:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 1
Top Layer - 5
Bottom Layer - 5
Initial Bottom Layer - 5
Infill - 0
Surface Mode - Normal
Skin Removal Width - 2.5

Wing Mount, Motor Mount Tool:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 3
Top Layer - 5
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 15% Grid
Surface Mode - Normal

Tires printed with TPU:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 2
Top Layer - 4
-Nose Wheel zero bottom layers
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 15% Grid
Print Temperature - 210
Flow - 115%
Infill & Wall Speed - 20mm/s
Surface Mode - Normal

Tires printed with Varioshore TPU:
Layer Height - 0.2
*Initial Layer Height - 0.15
Wall Line Count - 3
Top Layer - 4
-Nose Wheel zero bottom layers
Bottom Layer - 4
Initial Bottom Layer - 4
Infill - 20% Grid
Print Temperature - 240
Flow - 60%
Infill & Wall Speed - 30mm/s
Surface Mode - Normal