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Simple Hercules - RC Semi scale 1:32 C-130 Hercules - 129 cm wingspan

3D model description

EDIT - 04.03.2019:

Added skis. The main gear skis clamp around the rear wheels and use a rubber band around the front main wheel axle. Assemble them using M3x25 mm screws. Countersunk screws are best fir this but any will work. I made rubber bands for this by cutting up a road bicycle inner tube. They make extremely strong rubber bands. Mirror the main skis in your slicer to get skis for the other side. Video of the ski teeter function: https://youtu.be/XbbhEMCZWEw

The front ski secures to the nose wheel axle and should be glued together before installation.

I've also changed a lot of parts lately so check the parts list update time stamp. The new nose has more room for steering of the wheels and the new Vstab has a more scale outline.


EDIT:

Added a cargo door and scale propeller. The new parts are Cargohatch01, Fuselage03, Fuselage04-hatch, Fuselage05 and Scaleprop01. The propeller is suitable for low rpm use. For example 1500 kv motor on 2S. or 1000kv motor on 3S. High rpm will cause the propeller to flutter, which can break it. Use full cooling fan on to print the prop.


Check the file list for updates to the files if you have downloaded before.

This is a larger version of my micro Hercule (https://cults3d.com/en/3d-model/various/micro-c-130-hercules-rc-model).

Wingspan: 1290 mm
Length: 910 mm
Est. AUW: 500 g
CG: ~45mm from the leading edge of the wing center section.

I have not flown this yet but it should fly fine as it's a very conventional airplane.

General modeling skills and understanding of rc plane mechanics is required to assemble it.
Use CA hinges for all control surfaces.
Use 1 mm piano wire to connect elevators together.
Use 1 mm piano qire to create rudder torque link through the fuselage.
Use 1 mm piano wire to create aileron torque links if you're building a lightweight slow flyer. Important: If you intend to fly fast use separate servos for each aileron, mounted under the outer wing.Use an 8 mm carbon tube, or other 8 mm tube, to join the four center wing sections.
4mm, 3mm and 2 mm carbon rod is used to index, join and latch fuselage and wing parts together.
Nacelles can be fastened with an M3 screw in the rear hole and a little pin in the front hole for alignment.
The wing center section has 4mm channels for creating a latch mechanism after printing.
Fuselage 02, 03, and 04 should be printed with no top layers so that the top is open ended. That way the other parts slot into them.
Cut away the excess material on the bottom print layers of Fuselage 01 and other parts to reduce weight. Only a thin ring around the inside of the skin is needed.
Nose wheels should be 25 mm.
Main wheels should be 38 mm.

Suggested electronics:
6g servos or smaller recommended.
Suitable for ~28 mm drone motors. Sub 15 g motors recommended but the plane can carry <40g motors.
10 A ESCs.
2S 1500 mAh lipo or smaller.

Feel free to experiment. I made it all up, and so can you.

3D printing settings

Suggested settings:
Print everything with 0,12 mm layers, 0% infill and 0,25 mm extrusion width. This is easily done even with a 0,4 mm nozzle by simply setting the extrusion width to 0,25 in Simplify3D, for example. Use only enough top and bottom layers to close up the part. No need for super thick bottoms and tops.

Important part specific recommended settings:
Fuselage01: Use 2 bottom layers and 20 top layers.
Fuselage02: Use 2 bottom layers and 0 top layers.
Fuselage03: Use 2 bottom layers and 0 top layers.
Fuselage04: Use 2 bottom layers and 0 top layers.

  • 3D model format: STL

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Norwegian inventor/designer/cat owner.

License

CC BY NC

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