Water Rocket Launcher

prusaprinters

<h3>Water Rocket Launcher v1.21 - 26 April 2022</h3><p>A modular water rocket launcher system designed for universal compatibility. Multiple bottle and PVC pipe interfaces currently with options for North America, Australia/New Zealand, and the UK. Message me if interested in helping me include your locally-available pipes or bottles.</p><p>Construction overview and discussions at Instructables: <a href="https://www.instructables.com/3D-Printed-Water-Rocket-Launcher/">https://www.instructables.com/3D-Printed-Water-Rocket-Launcher/</a><br>Detailed (but out-of-date) instructions and design notes at magicsmokestat.com: <a href="https://magicsmokestat.com/water-rocket-launcher/">https://magicsmokestat.com/water-rocket-launcher/</a></p><h3>Core Selection Guide</h3><p>The launcher base accepts several different “Cores”, which are the central interface to the bottle. Each Core optimizes for different tradeoffs, among them: ease of part sourcing, ease of construction, performance, and reliability.</p><ul><li>Core Type A: Strongest with the longest test record. Launch tube configuration, with stainless-steel bolt reinforcement; requires ASTM Schedule 40 1/2"-nominal PVC pipe and PVC cement.</li><li>Core Type B: Easiest to assemble and region-independent. Uses a “bottle stopper" configuration, which is inherently lower-performing than a launch tube configuration. No PVC pipe or adhesives required.&nbsp;</li><li>Core Type C US: Launch tube configuration with no adhesives, for ASTM Schedule 40 1/2"-nominal PVC pipe. Finicky in assembly. Developed December 2021 and testing has been limited.</li><li>Core Type C AUS-NZ: Beta-test version similar to Core Type C, sized for AS/NZS 1477 DN15 PN18 PVC-U pipe common in Australia and New Zealand. This is as yet UNTESTED as I do not have this pipe available where I live. Please message me with whether it works for you.<br>Core Type C UK: Beta-test version similar to Core Type C, sized for UK overflow pipe. As yet UNTESTED. Please message me with whether it works for you.</li></ul><h3>Clamp Selection Guide</h3><p>Several clamps are available for different bottle dimensions. Measure the height from the opening of the bottle to the far-side of the flange (this is “height”, or “h”) and the flange diameter ("d"). Select your clamp accordingly.</p><ul><li>17h 33d: For PCO-1881 bottles common in the US</li><li>21h 33d: For PCO-1810 bottles common in many parts of the world, including Australia and New Zealand</li><li>15h 29to33d: For GME30.37 bottles common in UK/Europe</li></ul><h3>Non-Printed Parts List</h3><ul><li><a href="https://www.amazon.com/TR414-Rubber-Snap-Standard-Vehicle/dp/B08LG6P1KY/?th=1">TR414 Tire valve stem</a></li><li><a href="https://www.amazon.com/gp/product/B07YTGYFVX/?th=1">O-ring 15mm ID x 3.5mm thickness x 22mm OD</a></li><li>Rubber bands, any, but <a href="https://www.amazon.com/Colorful-Non-Latex-Stretchable-Supplies-Durable/dp/B09412MPWW/">silicone #33 (3 1/2" x 1/8") are nice</a></li><li>String to tie to Launch Pin</li><li>PVC Pipe, 21.4-5mm OD (see note below), 15-20cm sections x3</li><li><a href="https://www.amazon.com/dp/B07QPNRKXC">Bike pump hose extension</a> (recommended for all cores, strong versions recommended)</li><li>Parts for specific Cores:<ul><li>Type A: ASTM Schedule 40 PVC pipe, 7.0cm and 15-20cm, 1/4"-20 bolt 2.5" and nylon-inlay locknut</li><li>Type B: <a href="https://www.amazon.com/ALINK-12-Pack-Reusable-Drinking-Cleaning/dp/B095K5ND7F/">Reusable straw, 7.6-8mm OD</a></li><li>Type C: ASTM Schedule 40 PVC, 15-20cm</li></ul></li></ul><h3><strong>PVC Pipe Compatibility List</strong></h3><p>This launcher is currently compatible with the below pipe sizes.</p><ul><li>North America: ASTM Schedule 40 1/2" nominal PVC pipe (OD 21.4mm, ID 15.6mm). Compatible with 3D models marked “ASTM” or “21.4mm”, Core Type A</li><li>UK: 21.5mm overflow pipe (OD 21.5mm, ID 18.7-18.9mm). Compatible with “21.4mm”</li><li>AUS/NZ: AS/NZS 1477 DN15 PN18 PVC-U pipe (OD 21.1-21.5, ID 17.8). Compatible with “21.4mm”</li></ul><h3>Example Part Printing List (US)</h3><p>For a launcher for US standard pipes (21.4mm ASTM) and bottles (PCO-1881):<br>- Base 21.4mm<br>- Core (3 options)<br>- Collar<br>- Launch Pin<br>- Clamp 17h 33d x6<br>- Foot x3<br>- Peg x3<br>- Carrier</p><h3>Fin Beta Tests</h3><p>Several beta designs for fins are available for download below. Fins are designed to snap onto the bottle flange AND be secured with a trimmed bottle lid (Or try DaveTheYellowDart's <a href="https://www.prusaprinters.org/prints/154334-retainer-for-2l-soda-bottle">printable version</a>). See the picture for reference. All designs allow for required Clamp clearance.</p><p>Current fin designs are designed around the PCO-1881 bottle spec common in the US. They will likely fit any bottles with a 33mm flange (e.g. PCO-1810). They may also fit other bottles (but not snap on).</p><ul><li>Fin 33d 200mm: 200mm outer fin diameter, 3 fins</li><li>Fin 33d Custom Mount: Interface for making your own fins out of 4mm corrugated plastic board</li><li>Fin 33d Mount Only 64mm: Flange mount for use in CAD remixes. Make your own fin design around a 64mm central cylinder. In your slicer program, arrange your design and this Mount coaxially so they print together. Or import the mesh into your CAD program.</li></ul><p>Please share your experiences with these fin mounts so they can be improved and moved out of beta. If you are interested in testing mounts for different sized bottles, please contact me and I will make one to fit your bottle.</p><h3>Print Settings</h3><p><i>Line width: </i>0.4-0.45mm<br><i>Layer height: </i>0.20mm<br>Walls/perimeters: 2-3<br><i>Infill: </i>20% <strong>except Core Type A Center: Infill 100%</strong><br><i>Filament: </i>PLA/PLA+ (though need to protect from high heat). PETG ideal but not required.<br><i>Supports: </i>None, <strong>except Core Type A Center: Supports touching build plate</strong><br><i>Print bed adhesion: </i>Some parts have small footprints and may benefit from printing with brims or rafts depending on your print bed's adhesion. These include Core Type B and Core Type C, Type A Valve Backstop, and Launch Pin (the narrow parts sometimes lift off the bed)</p><h3><strong>Changelog</strong></h3><p>2022-04-26: Uploaded Base 21.4mm v1.21 (updated model file reference to Printables); Changed names of Core TypeD (now Type C AUS-NZ) and Type E (now Type C UK); minor edits to file descriptions<br>2022-03-25: Linked DaveTheYellowDart's bottle lid fin retaining ring model<br>2022-01-02: Betas for UK and AUS/NZ pipe Core and Foot added<br>2021-12-31: Uploaded fin betas 33d: 200mm, Custom Mount, Mount Only 64mm<br>2021-12-21: Updated all items to v1.2 except Wrench<br>2021-11-22: Updated several items to v1.1<br>2021-11-11: Test import to PrusaPrinters.org<br>2021-11-05: Uploaded Tubeless Core beta 1. Instructions: <a href="https://magicsmokestat.com/water-rocket-launcher/tubeless-core-assembly/">https://magicsmokestat.com/water-rocket-launcher/tubeless-core-assembly/</a><br>2021-10-01: Initial v1.0 release.</p>