3D Printed WORKING Roman Catapult (Onager)

Unleash ancient engineering on the tabletop with this fully functional Roman Catapult (Onager) - a torsion-powered siege engine.

Smaller yet more versatile than a Trebuchet,  this weapon of destruction was fast, fearsome and formidable!

This 3D printable catapult is designed for real launches using twisted skein, just like the original Roman artillery. Whether you're staging a tabletop battle, building a diorama, or just flinging things across your desk, this Onager brings authentic action to your miniature world.

🪢 Powered by twisted cord — mimicking real Roman torsion engines
⚙️ Designed for printability and ease of assembly
🖨️ Optimised for FDM printers — sturdy, tested, and desk-safe
📄 Includes a detailed PDF guide and full video tutorial

🧠 Want something with more bite? Check out the Premium Skull Edition on Cults3D!

MATERIALS
It's all in the Instructions PDF, but nothing major… PLA, a little TPU, a few M3 bolts, sleeving, strong thread, and the spring from an ordinary click-top-pen... stuff most makers have lying around.

SAFETY
Seriously, don’t fire this at anyone. It packs a punch. Hurting people, even that annoying neighbour, isn’t what this build is about. Play responsibly!
Always supervise children and pets when using the Onager, and keep fingers clear of fast-moving or pinching parts. Also, be mindful of the choking hazard associated with small parts around pets and young children. 

This model is provided “as-is” without any warranty or guarantee of fitness for purpose. By downloading or printing this file, you assume all risk. The creator (VogMan) accepts no liability for injury, damage, or misuse. Models should be assembled and used with care and under supervision where applicable. Not suitable for children.

LEGALITIES & USE
© VogMan, May 2025. Please respect my copyright and authorship.

These files are strictly for Personal Use Only.

You may:
✔️ Print physical copies for yourself
✔️ Share images of your prints online (credit to VogMan is appreciated)

You may NOT:
❌ Sell printed versions (unless licensed)
❌ Modify, share, or redistribute the digital files
❌ Use these files commercially without a license

Personal Use means just for you!

COMMERCIAL LICENSES
If you're a Registered VogMan Patron Commercial License holder, you're permitted to print and sell this item in line with that license.

However:
– The digital files remain the property of VogMan
– You may not share, modify, or distribute the digital files under any license

In short: the STLs are mine — printing is yours, with permission.

For full details about commercial licensing, click here:
https://www.vegoilguy.co.uk/commercial-license-info.php

FIND ME ONLINE
https://www.patreon.com/vegoilguy
https://www.youtube.com/@vogman
https://linktr.ee/vogman
https://www.instagram.com/the_vogman
https://www.facebook.com/thevogman
https://www.etsy.com/shop/VegOilGuy
http://www.vogman.co.uk

CONTACT
Have questions, feedback, or ideas? Reach out here:
https://www.vegoilguy.co.uk/contact_general.php