Modelling - Help

[RJMathiyazhagan]

I’d greatly appreciate any ideas or perspectives on how best to model this in Fusion. 

Thanks in advance!

[Drewpan]

Hi,

Is it the airfoil that you are having trouble with or the whole thing?

I am currently working on some complex airfoils for wings and ducted fan blades.

If you know how to model the empenage section that tail surfaces are joined to then it really

is just a matter of shaping the profiles and using them as rails and then lofting the airfoil

along the rails. If the airfoil shape is a common NACA or something then you should be able to

set up scale section and mount it onto you rails and loft. There are software plugins for fusion

that allow you to download the .dat files and other airfoil files from places like www.airfoiltools.com

that create a Sketch outline using the points. They are really useful if you have blended airfoils or

aerodynamic twist as you can place them, often further scale them, and loft directly between the

two.

If you have a file then post it to this thread and we can have a look and see what you need help with.

Cheers

Andrew

[davebYYPCU]

Build from the Outside > In, add details after the outlines, etc. Only do half and then Mirror all of it with one button press.

Looks like a plug from here. Large job there compared to the hand.

How much have you got done?

Happy to help, need a file of what you have already got done.

[RJMathiyazhagan]

Thank you @davebYYPCU and @Drewpan  for your interest in helping me. 

I’m currently working on modelling a fuselage, and I’d like to achieve a similar V-tail blending at the rear as shown in the image I uploaded.

Right now, I’m using symmetric NACA airfoils for the V-tail surfaces. I’ve gone through many versions and ended up discarding most of them because the blending wasn’t quite what I had in mind.

I’ve shared two versions for your reference. Thanks again for your support!

[davebYYPCU]

Couple of things.  First the tailplanes are too low to get to the pic example,

lifting them up a bit (sketch 10 suggestion) will help avoid the fuse chine that is currently causing drama (highlighted), avoiding that will help a great deal.

The airfoil at the trailing edge is not helping the transition, not checked but looks like it misaligned to the sketch 8 articles. (Loft error there)

Generally, build your transition, with more sketching and loft with tangency to body edges, LE Lofted fillet, is connected nicely.

The fillet attempt is bugged.

Demo only, this type of modelling is advanced if you are lost, I can add more explanations.

Might help...

[RJMathiyazhagan]

Thank you @davebYYPCU for your detailed explanation.

Would it be possible to merge the fuselage chin with the airfoil’s leading edge, allowing the leading line to transition smoothly into the airfoil and flow continuously toward the trailing edge at the tip? I've uploaded the design I'm working on for your reference.

From a modeling perspective, is it generally advisable to keep the airfoil’s trailing edge completely closed, or should it have a bit of thickness to avoid filleting problems?

[RJMathiyazhagan]

Tried a new version.

[davebYYPCU]

That's much better.  In fusion better to have a sharp TE, but in real life, a flat edge say 1 to 1.5mm is the norm, for strength and build ability.

I would expect the chin to be filleted for the same reason, easier to build, but makes some things in Fusion harder to manage.

In this example I think the tailplane join is too close to the fuse, cramping things over the top.  As a designer you have the license for appearance.  

Might help...

[RJMathiyazhagan]

I also ran into a few issues while printing with a closed, sharp trailing edge.

I'll take a look at the tailplane joining with the fuselage. 
Thanks again for your time.