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Free RC airplane

by Eclipson Jan 16, 2019
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Thanks for sharing this great project. I just started printing and hopefully all goes well. I started printing fus5 (i still need some new rolls of PLA for the most of the hull prints) i think i'm going for a white with fluorecent orange tips looking print. If all is well and a maiden flight will be succesfull i will report back. Just thanks for sharing, this kind of action is what makes the internet a very happy place :P.

I would like to ask something about the set-up, would a 1800kv motor + 45A esc be to much for this plane?
I actually have these left-over from an old plane i had.

I had some trouble printing the ailerons right, i had printed Aileron 1L and 2L but they didn't fit. First i thought maybe 2L and 2R are mixed up but that wasn't the case. I have now turned aileron2L 180 degree in Cura and for now it looks to be printing the right way around (so it will connect straight with 1L instead of with a angle which im sure isn't the way to go when looking at completed pictures). For now all stil seems to go well.


You won´t need 45 amps for this airplane, but if this is the motor you have use it.
About the problem that 1L and 2L does´t fit, there should be something wrong because all those parts have been tested and all them fit well. Remeber the should be printed hollow, follow our parameters otherwise you may have assembly issues.

They both do fit perfectly i just had to rearange them on the build plate because Cura (or maybe it's in the file) loaded both 2L and 2R upside down and the first attempt therefor did not fit (they where at an angle of eachother) after rotating the part in Cura everything fits perfectly. I do have one question now about the main wings, when assembling the whole wing there looks te be 2 openings in the wing where the gaps for the ailerons are, does that gap have any influence inflight? or should i tape them shut so no wind will grap inside those gaps as soon as the ailerons move from idle position? I will post a picture as soon as the whole wing is done printing.

I'm following your assembly guide as best as i can, parameters are good and parts are comming out great. For the motor set-up i've ditched the idea of using the 45A set-up im afraid either vibration,speed or power will break the plane, so i'm going to order something in the range of 20A/25A.

I'm still very thankfull for you guys to share this project, it's just awesome ;-)

thanks for letting us print this demo version of the model T! Though i'm having some troubles with printing. the print head is not retracting on all layers, just on the top few layers where the little connecting parts are. i have checked all my settings and nothing seems to fix this problem..

Hello. Can you attach some pictures to see the problem?

as you can see it's stringing really bad in the fuselage, but on top it is not. it's only retracting on the top part..
i guess it won't really affect flight quality, but it might be adding some weight.
printing with and ender 3.

edit: maybe i should just buy the cura files, that might fix it..? :)

What do you mean with "on the top part"?
I see the stringing problem, I guess you have already tried retraction from 0,3 to 6mm and with different speeds. if so, maybe the extruder is a bit blocked, try to uninstall it and clean everything well making sure that nothing is blocking the filament.
Try also to reduce the layer height, this can help.

the problem is that it's not retracting at all on most of the layers, but only on the top few layers, where the connector clips are.

The reason is that at this area you need more travels,and them the problem appears. Try to minimize the stringing, if not don´t worry too much. they are just adding a bit of weight, but they won´t be seen once assembled.

yeah thats what i was thinking. Thanks for the fast reply's and good luck on the next models. if i can get this thing up in the air i'll definitely buy the model t to get it on the water and maybe even some other models!

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Thanks for sharing this fantastic design! It would be really useful if we could know the target weight for each part, otherwise we're a bit blind until we finish printing all parts! Is this information available somewhere? I couldn't find it in https://www.eclipson-airplanes.com/modelt.



If you respect the parameters in red (our drawing) and the actual wall thickness you are getting is around 0,45 or 0,5 mm, the weight will be fine. ;)

Fingers crossed then! Thanks for the answer anyway.

Hola, e impreso y volado el avión. Felicidades por el gran diseño!.
Solo tengo una pregunta, se puede modificar algo en el avión para que vuele mas despacio.
Para mi gusto y mi experiencia vuela demasiado rápido.
Muchas gracias.


Mucha gracias, el diseño ya está enfocado para que vuele lento, si quieres que vuele lo mas lento posible usa batería ligeras sin descuidar el CG claro.

I started printing today, left wing. Thus far it is all coming out great.
I would say that the guide on how to print each part has been spot on, but it was difficult to figure it out at first.

I have watched the videos and enjoy them. they are a bit corny but productive. keep up the work, when I have spending money I plan to buy the file for the floats!

Thanks for your comment and good luck for the maiden flight!

Can I use HIPS instead PLA? If yes, can you recommend any specific settings for HIPS (Creality cr-10 with termobox)?


I do not recommend you to use HIPS for a 3D printed airplane, PLA is the best option, PETG is a good alternative but it is more difficult to print.

Have a look our article about materials for RC airplanes.

what all parts do you haft to buy? are they important?


You can fly the airplane with the files available here, but in case you want to add landing gear or floats you will need to buy the full version here: https://www.eclipson-airplanes.com/modelt

ok thank you, also would a hair dryer motor be strong enough?

No, you need a motor designed for RC airplanes, have a look the specification here: https://www.eclipson-airplanes.com/modelt

Do you need a y harness for the Ailerons? How do you connect the 2 servos on the wings?


Harness is not necessary if you have a radio transmitter with mixer and more than 4 channels.
Here you have the list of all the necessary items: https://www.eclipson-airplanes.com/modelt

You can see how to connect the servos on the wing on the assembly video.

Obrigado!! Estou começando a impressão do meu agora mesmo.

Finished printing and glueing together this plane. What do you use for hinges? Packing tape does not stick well and feels flimsy.
tia for your answer

What is "good" tape? What's "good" to one is "bad" to another. Can you give a specific?


You can find at our website all the necessary parts to fly the airplane, you can just click on the image and you will go to the recommended product page.


my printer is 230x150x150

some of the parts are to tall for my printer

See msg. I sent you.

MIN PRINTING VOLUME - 210x210x180 (X,Y,Z)
You can find this info here: https://www.eclipson-airplanes.com/modelt

Unfortunately you can not scale the parts.

Where is the file for the part that connects the landing gear to the fuselage?

Hello. This part is not available for free.

Do you have a wiring diagram for this?

I bought this model and I've been printing off the fuselage first. I used the specified parameters and saved my own gcodes for my printer (a Tronxy X3A - I was very careful to match the parameters in Cura). I'm very concerned about fus2 and fus3, because the side walls are wafer thin....and I mean really thin...like tissue paper! I even increased the thickness to 1.6mm, but that hasn't helped. They are so thin I don't think it will be strong enough to hold the wing and fly. I've had to reprint these several times because I've broken them getting them off the print bed they are so fragile. Also I've noticed the floor layer has delaminated...there is a sub mm gap when it prints.
I've also increased the quality to 0.06mm and it's still very grainy and wavy. It needs a good sanding to smooth out the lines...making the alreasy thin fuselage sections even thinner! I've printed some very good quality things with this printer so I'm not sure if it's the printer hardware here. Some help with Cura advanced settings would be a big help here please!

If not then think I'll have to import these into fusion360 and redesign.


I see lack of material, bad adhesion between layers, maybe lack of material after travels and stringing, those are the reasons of the weakness of your parts.
Try to start printing "float1" because is easier , once you achieve a good quality go a head with other parts more complex like the fuselage and finally the wing.

Did you try to use directly the G-codes we provided?

Here you have a guide that will help you.

Hi, I've printed float1, no problems. I've tried the native gcodes and it was terrible. So I resaved with cura. I'm trying to print fus2 again, this time with layer height 0.2mm and brand new filament that arrived today. I am having trouble with only fus2 and fus3. Last night I printed off a wing tip and it is near perfect, just a bit of sanding needed. Look at the attached file, You can clearly see there is a gap in the printing, what looks like de-lamination is actually two walls. They are not together.

EDIT: I have aborted the print again. The walls are way too thin and bendy, they measure 0.6mm they should be 0.82mm - i imported the .stl files into Fusion360 and measured them. I think something is wrong with fus2.stl and fus3.stl files.

EDIT2: Looks like fus1 has the same problem with the gap:

Ok I see the problem, if you have a look our drawing note 6 tells you "Adjust flow to ensure actual wall thickness of 0,5 mm (tol ±0,05)"
At this area of the fuselage there are 2 walls together so the real thickness should be closer to 1mm.

So what do I adjust it to? Flow % is already at 100 as per the instructions (100 - 105). I'll knock it up to 110 and see what happens.

OK, so I increased it to 110 and it's still the same problem. I also increased it to 140, and no change. Why are there two walls?? That makes no sense. There should be a single thick wall, 0.8 or 1mm thick. I think these files need correcting. It looks like they are built like an onion, many thin layers instead of a single thick layer.

Files are ok, I don´t recommend you to modify anything, they have been more than tested with different printers and with different slicer softwares and everybody have been able to print it with quality. Keep in mind that this is an airplane that will fly and should be very light, conventional design concept you are used to are not valid here.
I see an improvement but still an strange gap located at the floor.. it seems that some parameter is doing something strange there, it separating the walls, did you create your own profile from scratch? or did you modified the one we provided you? try the second option.

I'm using the .stl files that I bought off your website. I'm using Cura I'm noticing a lot inconsistencies. I printed off a wing edge and it printed fine. Then with the same parameters I tried printing off the centre wing. Same problems as the fuselage...thin multi walls, very weak. I think I'm going to have to import the stl files into fusion 360, convert to solid, edit and resave because I don't know what else to try here.

So I think I have finally found the problem and a solution!

I showed the pictures to a professional 3D printer and the first thing he said to me was - Make sure the 'Fill Gaps Between Walls' is set to 'Everywhere'. I do not have this setting with my slicer, Cura 15.04.2 and this is not mentioned in the printing parameters. So I downloaded Utimaker Cura and it has this setting! I set it to Everywhere and I'm not having the delamination problem...

Good news. To be honest I have never tried to modify this parameter, I have seen that by default is set as "Everywhere". I was sure that the problem was some strange parameter because the files are ok. Anyway this parameter was already set as "everywhere" with the cura profiles we provide when you purchase the airplane.

Yes, not all slicers seem to have this setting, (I cannot find it on Cura 15.04.2) so it's worth bearing in mind. I'm printing off the wing sections, and still concerned by how very thin and bendy they are.I can compress the front wing section between thumb and forefinger with virtually no effort - and this is with the paramaters exactly as specified. I'll have to coat the entire plane in some sort of sealant to harden it

I have abandoned this in favour of something from 3DLab Print. I'm not convinced on the structural strength of this aircraft. I think a few hard landings will break it. The one I'm printing off now from 3DLabPrint is very strong; it has internal cross bracing and the wing is very strong - and no issues with delaminations.

We are engineers, we have done a lot of stress calculation to add just the necessary reinforcement, more reinforcement are not necessary and are just adding weight, extra weight is not so important for a RC car or boat, but is critical on a flying machine like this, more weight means more energy consumption, speed is higher, load factor is higher.... the wing loading of this model is only 46g/dm2, really good value for a 3D printed plane.
Here you have the prove of the strength of the airplane, after this hard crash, any damage.

If you want to learn more about stress you can also have look these articles:

Try turning off your cooling fan so that the layers adhere to each other better

What, the fan that sits on top of the heatsink? That's the only fan it has.

Then you don´t have cooling fan for your parts, only for the extruder. Reduce speed to allow cooling down the material.

Why wing2 have the bottom full? Wing2 don't have hole to receive wing1. It does not fit with wing1 unless I cut the bottom of wing2L.

Wing2 has no bottom layers.

ok, found the problem

Hey. on what settings to print.

Have a look the drawing to find this info.

Just wanted to say thanks for sharing your work it's very much appreciated!

I'm looking forward to purchasing and printing this as my first RC-Plane. Is the landing gear on the purchased model swappable between land and water (with screws etc), or is it a different body part?

Same fuselage for water and taildragger version.

cool looking design. FYI, I did find several files that needed to be repaired in Netfabb as the mesh was not closed. I have yet to print, but looking forward to it.
Aileron1L (repaired).stl
Aileron1R (repaired).stl
Elev2R (repaired).stl
Fus1 (repaired).stl
Fus3_FV (repaired).stl
Fus4 (repaired).stl
Fus5 (repaired).stl
Wing_C (repaired).stl
Wing1L (repaired).stl
Wing1R (repaired).stl
Wing2L (repaired).stl
Wing2R (repaired).stl

You don't repair the meshes on 3d printed planes. They are made with a technique to allow for single wall printing and a premade internal structure.

Hello, don´t worry for that, it is not necessary to modify the original files, those parts have been already tested with different slicer softwares and no problems.

indeed it is really great design! In case i decide to print it , all files needed are here or should i pay at your site for more files needed?

You have here everything you need to fly the airplane, but if you want also the landing gear, floats, gcodes and sheme you need to buy the full version.

So Awesome. Thanks a mill guys :)

I actually printed a hybrid of your last two planes....
Fuselage from the one and the wing from the other, with few custom bits and fittings in-between, just for my own enjoyment. Hasn't had it's maiden flight yet tho.

You guys are great, keep doing a good work. Felicidades !!!

May I suggest a new style? A small (1.5m) slope glider, handlaunched, no motor, just something easy to carry on.