MANUEL IN FILES

Summary

Muffin is my own full 3D printed RC airplane.

It is tested, so if you want to print it, you can have a very stable and fast model.

About the weight:

Like the others full 3D printed rc planes, it's a bit heavy respect a balsa or foam plane having the same dimentions. So it requires a bit of skill during the landing, because of the more speed needed to avoid stalling.

To get around this problem, I made an upgrade of this model, built with some balsa wood parts and small tricks, which allowed me to obtain a lighter model aircraft of 300g, which flies like a classic aircraft.

The light weight upgrade, is avaliable here: https://www.***********.com/thing:4697586

Istory:

Added file "1X + 1X mirrored wing 1 V1.411" with renforced centering pin.

Avaliable a light weight upgrade: https://www.***********.com/thing:4697586

Wingspan: 100cm

Lenght: 71.5cm

Weight in order of flight: 1080g

Wing load: 67.5g/Cm2

Needed:

1 x spool of PETG or PLA filament

2 meters of D8mm aluminum tube (I bought it in a brico center)

1 x 2208 1800KV 4S brushless motor (I used one motor recicled from one drone)

1 x 30A 4S ESC

1 X 4S 1400/1500 mAh LIPO battery

3 x 4g servo (I suggest this for ailerons: https://hobbyking.com/it_it/corona-digital-servo-2-2kg-0-11sec-12-5g.html?affiliate_code=ZDFVCEGPTZOFGVZ&_asc=9939418894)

Min. 4CH radio control system

1 x 6040 propeller

1 x 2mm steel rod (for landing gear)

2 x 1mm steel push rod (for rudder and elevator control)

1 x 1.5mm steel rod (for elevator)

2 x 2 mm wire hanger for aileron controls (or other)

2 x Clevis for Non Threaded Control Rod

3 x M3x8 self tapping screw

2 x M2x6 self tapping screw

1 X M4 self tapping screw (for wing)

2 x Landing Gear Wheel Stop Set Collar 2mm hole

D4mm carbon tube or other, for tail planes assembly

Lead or other, for balance the plane

CA glue medium density

CA spray activator

Print Settings

Printer:

D-bot

Resolution:

0.25

Filament brand:

Filament material:

PETG

Notes:

NB:

For wings and tail printing, are needed special slice settings, like disable "union overlapping volumes", and not all the slicers can do it!

One suggested slicer is "****" and another is "Simplify3D"; the CURA settings file, are attached.

The wing 3 is very hight: if you haven't a big printer, are avaliables wing 3_1 and wing 3_2, that must be glued using CA glue and CA spray activator.

Some components are also required in the mirrored version: please be care to mirror it using your slicer software.

My planes are printed using PETG, because it have best layer adhesion respect other materials, but it's also possible to use PLA filament.

Post-Printing

Wings

Cut two 8mm aluminium tubes log 975mm and belt them in the middle, like the picture.

Mount the wings 1 RH and LH on the aluminium rods and fix them with the ciano glue + activator (don't appy glue on the rods), then also fix the screw renforcment and the servo plate.

If yow have difficult, it's possible to enlarge the holes using a 8mm drilling tool.

Belt and cut the aileron controls like the picture using a 2mm rod (it's good to use a 2 mm wire hanger), payng attention to make one right an one left control

The hinges are obtained directly in the printing, but the excess parts must be eliminated.

Put in position the alileon controls and the covers, mount wing_2-3-4 and fix them using some adesive tape.

Please do not use glue!

The hinges are obtained directly in the printing, but the excess parts must be eliminated.

Since it is possible to fly using only the ailerons, the rudder can also be left fixed. In this case, there is no need to cut the hinges and mount the rudder servo.

The hinges are obtained directly in the printing, but the excess parts must be eliminated.

Center of gravity

Very important!! Move the components and add weight to bring the center of gravity down to the position indicated under the wings.

Muffin full 3D printed RC airplane

0.2mm layer, 2 walls, 15% infill