New project : La-9 (rc warbird) for 3D printing

Show off your FreeCAD projects here!
User avatar
Kunda1
Posts: 9222
Joined: Thu Jan 05, 2017 9:03 pm

Re: New project : La-9 (rc warbird) for 3D printing

Postby Kunda1 » Thu Oct 15, 2020 6:39 pm

HardRock wrote:
Thu Oct 15, 2020 6:07 pm
OK, hold on, I can reproduce lof of bugs in simple freecad project file :D
Open new threads for each bug.
Also can you add your About info to the original post of this thread ? Thanks!
Alone you go faster. Together we go farther
Want to contribute back to FC? Checkout:
#lowhangingfruit | Use the Source, Luke. | How to Help FreeCAD | How to report FC bugs and features
HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Thu Oct 15, 2020 6:45 pm

HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Fri Nov 13, 2020 7:58 am

Still in progress... 1/10 scale. Test print.

It will be for FPV aircombat.
Will be made by 3d printed + cnc foam cutted technology.
Attachments
IMG_20201112_100420~2_copy_1280x993.jpg
IMG_20201112_100420~2_copy_1280x993.jpg (347.91 KiB) Viewed 685 times
keithsloan52
Posts: 1577
Joined: Mon Feb 27, 2012 5:31 pm

Re: New project : La-9 (rc warbird) for 3D printing

Postby keithsloan52 » Sat Nov 14, 2020 6:22 am

Are the 3d printed parts sealed in any way? Like covering of 'dope' as used on balsa models covered in tissue.
HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Sat Nov 14, 2020 6:47 am

Not right now. Just printed and glued together with CA.
Similar to balsa construction will be for 1.4m wingspan. This is only 980mm version.
Most of parf will be made from foam, cutted with cnc hot wire cutter.
HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Sun Nov 15, 2020 3:11 pm

Image
User avatar
Zolko
Posts: 1189
Joined: Mon Dec 17, 2018 10:02 am

Re: New project : La-9 (rc warbird) for 3D printing

Postby Zolko » Sun Nov 15, 2020 4:26 pm

Really nice, I'm impressed. How did you print ? Do you have a picture of the parts separated, before putting together ?
try the Assembly4 workbench for FreCAD v0.19
install with Tools > Addon Manager > Assembly4 — tutorials here and here
User avatar
-alex-
Posts: 726
Joined: Wed Feb 13, 2019 9:42 pm
Location: France

Re: New project : La-9 (rc warbird) for 3D printing

Postby -alex- » Sun Nov 15, 2020 4:28 pm

Zolko wrote:
Sun Nov 15, 2020 4:26 pm
Really nice, I'm impressed. How did you print ? Do you have a picture of the parts separated, before putting together ?
+1
HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Mon Nov 16, 2020 7:23 am

Zolko wrote:
Sun Nov 15, 2020 4:26 pm
Really nice, I'm impressed. How did you print ? Do you have a picture of the parts separated, before putting together ?
Thank you. Sorry, there is no pictures of parts before putting all together. You may find more pictures on imgbb by clicking on the picture above. Trace parts by glue marks.

This print is not for flying, is was printed to see how parts are fit each other and to find a technical solutions for deeper design.
Internal structure is not optimized for 3d printing right now, so parts are heavier about 20-25% than it should be.
Because some parts will be made from foam, they don't have any internal structure, different setting of infill used instead directly in slicer.
Using foam parts should give about 50% weight reduction of airframe.
This significal because airplane is designing for FPV aircombat, not for 3rd view flying. It must be easier to handle than regular full printed airplane and main way for reach that is weight reduction.
Also it must be stronger to hold hard landings and crashes. Foam is more risistant to crashes, and again, less weight - less destruction.

In general, when you printing anything, you should keep all perimeters closed to allow slicer do his job correctly.
This is why on most 3d printed airplanes you should cut hatches after print.
Here is no parts that must be cutted because airplane consists only from parts with volume. For example, space on top of fuselage is not cutted, because fuselage will be made from foam parts in the middle. So top printed parts will have volume too (left and right side as extension of fuselage foam parts)
HardRock
Posts: 83
Joined: Tue Mar 13, 2018 5:50 am
Location: Russian Federation

Re: New project : La-9 (rc warbird) for 3D printing

Postby HardRock » Thu Nov 19, 2020 10:11 am

Almost ready for cutting foam parts ;)

Blue - 3d printed. Orange - foam.
Image
Image