Water Rocket Cork

thingiverse

Hey guys, today I'm bringing you a simple yet effective improvised cork that fits any bottleneck. You'll need: 1. 3D print 2. A scrap inner tube from a bike so you can use the valve and rubber to make an airtight connection with the bottle. 3. 4 x M3 bolts and nuts Method: 1. Cut a 10 mm wide by 10 cm long strip of rubber, wrap it in a spiral manner as seen in the pictures. 2. To secure the strip, cut a 40 mm x 35mm rectangle then make a small circle in the centre of the rectangle (see picture). 3. Slide the rectangle with the circle over the spiral as seen on pictures to hold everything together (see pictures). 4. Feed the valve through the hole and make small cuts for the bolts. You'll also need a second rubber gasket to ensure there isn't an air leak (see picture). 5. When inserting the cork into the bottle, you'll need to twist it as you push it in - this will give you a secure seal. 6. You can modify the Solidworks file if you want but sharing any improvements would be great. 7. I hope you enjoy the design and have fun making rockets. My YouTube channel is MrJefferson105.