Catapult Inspired By Leonardo da Vinci (remix)

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

Print Settings

Printer Brand:

Prusa

Printer:

i3 MK3

Rafts:

Supports:

Resolution:

Custom Section

Materials Needed

M4 x 25mm Cap Screws - 6rnM4 Nut - 1rnM4 x 15mm Cap Screws - 2rnM4 x 20mm Cap Screws - 3rnM4 x 35mm Cap Screws - 1rnrnM6 x 35mm Cap Screws - 6rnM6 Threaded rod 150mm longrnM6 Hex Nut - 9rn(M6 Nyloc Nut - 2, replace 4 regular nuts)rnM6 Washers - 7rnrnAn assortment of elastic bands (smaller ones will give greater power for the arm)

Category: Engineering

Catapult Inspired By Leonardo da Vinci (remix)

by Jörn · original on Printables ↗

Learning / Engineering

♥ 512⬇ 941🖨 5 prints

License: Creative Commons — Attribution ↗nsfwthingiverse

Print profiles

A_Frame_1.stlDEFAULT
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Right_Spring_Frame.stl
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Ratchet.stl
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Trigger.stl
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fulcrum_bar.stl
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bucket_wheel.stl
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Arm_Rear_wo_logo.stl
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Bucket.stl
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Front_Frame.stl
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Left_Spring_frame.stl
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A_Frame_2.stl
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fulcrum_ring.stl
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Arm_Rear.stl
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Arm.stl
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Spring.stl
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Back_Frame.stl
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Spring_REENFORCED.stl
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Bucket_big.stl
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