Air Plane Design Workbench - discussion thread

[adrianinsaval]

will it take NACA profiles
as the Python addon for Linuxcnc XYUV Gcode does
http://wiki.linuxcnc.org/cgi-bin/wiki.p ... _EDM_Style

Hello,
thanks for you suggestion. I integrate a NACA 4 and 5 digits in the workbench.
Capture d’écran 2019-10-20 à 10.41.37.png

After creation you can change the NACA profil/Number of points and choord or switch to a DAT file.


Capture d’écran 2019-10-20 à 10.42.06.png

The result

Capture d’écran 2019-10-20 à 10.41.50.png



Enjoy.

Frédéric

Great! Thanks!

[pl7i92LCNC]

wonderfull work
now hotwire Foam cutter
profile XY UV shoudt be considert to bring a good gcode to the mashine from the WB not over path

[miniellipse]

Fred,

Thank you. I tried playing around with your WB. Can you or someone show which WB or tool to make holes in the ribs and give them thickness so I can 3D print them. I tried to use the part design work bench and sketch but Freecad didn’t like that because there was no body container. I think I am mixing work benches so a step by step instruction would be nice.

[a179308]

Fred,

Thank you. I tried playing around with your WB. Can you or someone show which WB or tool to make holes in the ribs and give them thickness so I can 3D print them. I tried to use the part design work bench and sketch but Freecad didn’t like that because there was no body container. I think I am mixing work benches so a step by step instruction would be nice.

I confirm there is a problem , until I find a solution here are two workarounds :
two ways to resolve your problem :
-after the rib creation, go to draft WB
-first way : transform the rib in a sketch : a clic on

Capture d’écran 2019-10-26 à 20.55.03.png (10.19 KiB) Viewed 1471 times

, after this operation you can extrude the rib, use the part WB etc..
-second way : downgrade the ribs: a clic on

Capture d’écran 2019-10-26 à 20.54.58.png (6.96 KiB) Viewed 1471 times

Capture d’écran 2019-10-26 à 21.04.08.png (41.57 KiB) Viewed 1471 times

Frédéric

[a179308]

Fred,

Thank you. I tried playing around with your WB. Can you or someone show which WB or tool to make holes in the ribs and give them thickness so I can 3D print them. I tried to use the part design work bench and sketch but Freecad didn’t like that because there was no body container. I think I am mixing work benches so a step by step instruction would be nice.

I confirm there is a problem , until I find a solution here are two workarounds :
two ways to resolve your problem :
-after the rib creation, go to draft WB
-first way : transform the rib in a sketch : a clic on Capture d’écran 2019-10-26 à 20.55.03.png , after this operation you can extrude the rib, use the part WB etc..
-second way : downgrade the ribs: a clic on Capture d’écran 2019-10-26 à 20.54.58.png
Capture d’écran 2019-10-26 à 21.04.08.png


Frédéric

Some precision, there is a problem only with Part Design WB, but you can use directly the rib in the Part WB.

Capture d’écran 2019-10-26 à 21.15.12.png (618.99 KiB) Viewed 1466 times

Frédéric

[adrianinsaval]

In part design you can use a shapebinder inside a body

[miniellipse]

Thank you for the quick replies to help me out. I will work on your instructions.


Eventually, this is what I would like to learn how to do. There is a new technique to create 3d printed airplanes and it requires really good CAD technique because the wing ribs are not at the standard angle. See here:

https://www.thingiverse.com/thing:2209989/files

Screen Shot 2019-10-26 at 11.30.50 PM.png (261.15 KiB) Viewed 1417 times

[GlouGlou]

Nice work!
Open end could be an option to build a bspline. Could be x% of the chord.

[hammax]

… 2 BSplines in sketcher with 5 - 6 Points one on suction side and also one on pressure side gives already a solution.
https://forum.freecadweb.org/viewtopic. ... 22#p343522

Ex_Profiles.PNG (31.86 KiB) Viewed 1371 times

[adrianinsaval]

HI! I've made a Pull Request implementing the usage of BSplines, please review! Currently, there is no GUI to choose to use either BSpline or lines since I don't really know how to do that, please make one if you can.

To anyone interested, head to my branch if you wanna test.

Thanks!