Launcher for water rockets based on a Gardena coupler

myminifactory

As a small boy (a long time ago) I had a water rocket toy.I decided to build one for my grandchildren. The base idea that the toy will be (relatively) safe so that young children can play with it. I do not have the ambition to set height records etc. You can find many design on the internet, also some based on a Gardena type garden hose coupler. You can also find an adapter for the bottle, gardena faucet part and rocket fins here. This here is my design. Fort the launcher platform: Parts to buy:1) A Gardena garden hose coupler2) A piece of pvc tubing fitting the Gardena coupler3) A few meters of smaller pvc tubing approx 0.25 inch to be able to pump the rocket at a safe distance. With a special Gardena coupler you can connect directly to 12od pvc tubing.4) An air valve. I used a car type from an old bicycle tube (fitting in the 0.25 inch pvc tube)5) Tube clamps for the tubing you use.6) An 8 mm wooden rod for the trigger handle to be cut to size. 7) 4 camping type thin ground pins (max 5mm). To secure the launcher to the ground.8) A piece of rope (max 3 mm thick) to release the rocket from a safe distance.9) A M3 fastener and nut approx 10 mm. You have to cut it afterwards. Parts to be printed:1) The launcher. Print it with 0.3mm, 10% Infill and supports.2) The clamping ring around the Gardena coupler. Print it 0.1mm 30% infill and with supports3) The trigger ring. Print it with 0.1 mm, 30% infill and supports. Please be carefull! Anything under pressure can explode. Also objects falling down can hit someone! I do not take any reponsibility or liability for accidents or damages