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Catapult

trajectory_display_large.jpg Catapult
first_version_display_large_display_large.jpg Catapult
catapult_openscad10_display_large_display_large.jpg Catapult
catapult_openscad_display_large_display_large.jpg Catapult
Widget_Guiness_display_large_display_large.jpg Catapult
catapult_display_large_display_large.jpg Catapult
arm_skp.stl Catapult
base_skp.stl Catapult
catapult_v2.stl Catapult
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Creation quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.
  • 8.8k views
  • 17 likes
  • 159 downloads
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  • 3 makes
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3D design format
STL Folder details Close
  • arm_skp.stl
  • base_skp.stl
  • catapult_v2.stl

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Publication date 2018-11-16 at 13:53
Design number 37651
Azagal

Azagal

3D printer file info

3D model description

The first version is a floating widget catapult (those patented plastic balls that you find in some black cans of beer).

Watch it in action:

http://vimeo.com/29575935

 

The second is an OpenSCAD catapult with one single parameter.

Just enter the diameter of your projectile and let it build arm and base accordingly.

Short animation showing variation of "projectile_diameter" from 10 to 35 millimeters:

http://vimeo.com/29589013

If you want a longer arm catapult also adjust the "catapult_length" parameter.

 

Floating widget image from:

http://en.wikipedia.org/wiki/Floating_Widget

3D printing settings

If you're a beer drinker, impress your kids by not injuring yourself extracting the floating widget.

If not, impress them anyway by measuring the shadow of your projectile at a known distance from a light source and by doing the math to determine its diameter.

Throwing power determined by infill solidity at printing time.

0.3 in the demonstration above.

Thanks to Igor

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