YES you have read correctly and NO this is not a clickbait title (this is not YouTube after all) - This compound crossbow genuinely shoots 3 bolts simultaniously or in quick succession!
The concept of multi shot crossbows exists since ancient times but has never proven quite feasable - until now!
To the best of my knowledge there was neither a commercial product on the market nor a 3D model available that resembles a fully functional 3 shot crossbow. So I decided why not make one myself?
Historic designs used to simply stack two or three bows on top of each other, coupling their triggers together.
Rather than a primitive linear array, my innovative design approach is based on a circular one. It puts three complete compound crossbows around a prismatic mainframe, merging them into one rigid construction.
The fully modular rail system allows you to put together a custom-made body to you liking. Choose from different limb strengths to create either a toy or something more elaborate. The simple yet robust trigger unit was designed completely from scratch to allow for different fire mode set-ups.
The three bows can either be tensioned individually or at once with the integrated front grip/tensioner.
Make no mistake - this is not even close to a newbie thing!
It requires a fairly fine tuned printer, takes a cumalative 92 hours! (net print time) and costs about 13 €/$ total to make (energy cost excluded).
Did I just discourage you or are you uncertain a fully 3D printed crossbow might even work? Then check out my debut work in the field: The proven Miniature Compound Bow (https://www.thingiverse.com/thing:2764962). It delivers one third of the fun at a fraction of the expense ;)!
Please consult the documentation in the download section for detailed recommendations on print settings for each individual part. Listing all settings here would be far too complex.
The documentation in the thing files contains a detailed and pictured step-by-step assembly guide to help you with putting this thing together.
Feel free to contact me with any remaining questions, but please first consult the manual and see if you can find anything useful!
Step 14 from the Assembly Guide