i am trying to turn a complex shell into a thickness of 5mm

[carlweitman50]

I am trying to turn a complex shell into a thickness of 5mm. I have tried everything but i cant solve it. The design has no warnings so thats propably not the problem. Is there someone who maybe could help me out.

[carlweitman50]

nope, only has an infill option but i need it to be a fixed 3mm thickness

[Drewpan]

Hi,

I wouldn't worry too much about the aerodynamics of relatively small windows and a much bigger fuselage. For

starters, Boeing doesn't on the real thing, (well they do but it is way to complicated to do on a model)

and secondly if this is an RC model then if it doesn't fly it isn't the windows that are the problem, it will be something

else. As a general rule, in relative terms most RC models or scale models of any kind are exactly that, a SCALE model.

If you actually scaled up the amount of thrust or speed that the model was ACTUALLY doing it would be a totally

unrealistic number. I recently saw someone calculate a speed of a boat model. The real thing was speed limited to

about 20 knots, if the scaled version was doing the scaled up speed it was actually doing on the water it would have

been thousands of knots. I think you will find the same thing with your model. It might need say 20 Knots to get

airbourne and not stall, if you scale up a 1/25 scale model then 25 x 20 = 500 knots to avoid stalling - I think the FAA

might have something to say about that and there is not a runway on the planet it could take off from.

Cheers

Andrew

[wersy]

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@carlweitman50  schrieb:

Hello. Very many thanks to the help. However if you look closely on the top of the window, there is unfortunately an uneven shape. This is problematic because then i cant join them and properly print them. Very many thanks tho, and i would greatly appreciate if you maybe took a look at the problem.

Thanks,

Carl

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It seems that this corner makes the part partially unworkable. For example, the shell cannot be split lengthwise.

Forget this body, it's just an attempt to thicken the surfaces by hook or by crook.

I don't quite understand why you can't print without infill. Which slicer do you use?
If you print without infill, the wall must not be thicker than 1 mm. That means 2 perimeters of 0.5 mm each.

[wersy]

I think you will need 3 perimeters.

[wersy]

You can also insert spars for reinforcement.

[carlweitman50]

What slicer are you using. Mine couldnt do that. 

[carlweitman50]

is it possible if you also showed me how you did that. Tried to do it in cura but didnt succeed.

[wersy · Accepted solution]

First you need to cut slots.

I use Prusaslicer.

If you use Cura take 3 lines (perimeters)
And no infill.

[carlweitman50]

very many thanks. Its nice to see other people designing other airplane builds too,

Carl

[wersy]

I would add bars to stabilize the hull.

[carlweitman50]

Decided to do an a321 neo instead. If you want to build the same plane, I am going to link a file. I strongly suggest designing a passenger airplane because its very fun and challenging...

Carl

[carlweitman50]

Hi. I am now done with my plane, however when i slice it, it looks horrible. Is the preview just faulty or will it look like that after i have printed it. I will link both the fusion file and the stl file.

[wersy]

Slicing surfaces is very complicated.
You also have to set the slicer to "Surface".

[carlweitman50]

yes thanks. However it skips some parts of the design. Is there any way to do it more accurately so that every part of the design is included, considering that there is a former at the bottom of the model with a different thickness than the rest of the model.

[wersy]

In "Surface" mode, the nozzle only follows surfaces. To achieve a certain thickness, a corresponding number of surfaces must be placed next to each other.

In addition, the center of the surfaces is followed. That means outer and inner surfaces must be offset by half the extrusion width.

And there are many more rules that need to be observed.

As I already mentioned, slicing surfaces is very complicated.
If I can give you some good advice - forget it.

[carlweitman50]

Yes okay, but i still want the nose. Is there any other way that i can slice it. Maybe making it a solid and then slicing it, keeping in mind that the bottom part is supposed to have a different thickness than the Shell. Please check out the attached file in my previous message.

[wersy]

You have to print the ring separately.

[carlweitman50]

yes. Now i have tried to slice it as a surface, but all of the slots dont show up, only the vertical spars, but not the horizontal. I have checked that the horizontal spars touch the shell, and i have also tried making it a solid. None of this has worked however, while also keeping in mind of the windows, so that they are a part of the finished product.

[wersy]

Designing more complex parts in surfaces is something for specialists, I don't count myself among them.
I would do as I have already recommended.
And just move the windows slightly inwards. To do this, the window surface must be split.

[carlweitman50]

ok. I think i have an idea to solve the problem now. Could you please tell me how you did the slots on the nose cone.