Catapult Inspired By Leonardo da Vinci (remix)

prusaprinters

<p>I have changed the "bucket" to be wider for bigger "projectiles" and added a thumb wheel of easy range adjustment.</p> <p>But the bigger redesign is the fulcrum. I split it into two parts to be printed easier.<br/> Now the hole for the axle goes now through all the way, so a longer threaded is needed</p> <p> <figure class="media"> <oembed url="https://youtu.be/aHacG3KJ2HM"></oembed> </figure> </p> <p>EDIT 4/30/2019</p> <p>As mentioned below I managed to break/wear out the spring rather quickly.<br/> 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> <p>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>P.P.S: Here is the original:<br/> <a href="https://www.thingiverse.com/thing:3436588">https://www.thingiverse.com/thing:3436588</a></p> <h3> Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p><p class="detail-setting printer"><strong>Printer: </strong> <div><p>i3 MK3</p></div><strong>Rafts:</strong></p> <p>No</p> <p><p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div><strong>Resolution:</strong></p> <p>.1</p> <h3> Custom Section</h3> <p><strong>Materials Needed</strong></p> <div><p>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)</p></div></p></p> Category: Engineering