I have changed the "bucket" to be wider for bigger "projectiles" and added a thumb wheel of easy range adjustment.
But the bigger redesign is the fulcrum. I split it into two parts to be printed easier.
Now the hole for the axle goes now through all the way, so a longer threaded is needed
EDIT 4/30/2019
As mentioned below I managed to break/wear out the spring rather quickly.
Hence I added a beefed up version. This might not be the engineering approach of Leonardo as he had presumably no access to rubber bands. I use my catapult as an office toy and am therefore not too concerned with historical accuracy.
P.S. I will need to redesign the spring and strengthen it. It suffered material fatigue due to tightening the rubber bands to much, because I wanted to increase range and power. Stay tuned!
P.P.S: Here is the original:
https://www.thingiverse.com/thing:3436588
| Arm.stl | 42.9KB | |
| Arm_Rear.stl | 144.8KB | |
| Arm_Rear_wo_logo.stl | 96.3KB | |
| A_Frame_1.stl | 54.0KB | |
| A_Frame_2.stl | 94.4KB | |
| Back_Frame.stl | 116.5KB | |
| Bucket.stl | 1.1MB | |
| Bucket_big.stl | 878.2KB | |
| bucket_wheel.stl | 644.2KB | |
| Front_Frame.stl | 108.7KB | |
| fulcrum_bar.stl | 699.5KB | |
| fulcrum_ring.stl | 366.2KB | |
| Left_Spring_frame.stl | 99.3KB | |
| Ratchet.stl | 90.5KB | |
| Right_Spring_Frame.stl | 99.3KB | |
| Spring.stl | 123.3KB | |
| Spring_REENFORCED.stl | 160.8KB | |
| Trigger.stl | 58.6KB |
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