Model Rocket for Estes E / F Engines

thingiverse

This is a 635mm or 935mm tall 3D printed model rocket for use with Estes E or F Engines. The body tube is 50mm in diameter and 1mm wall thickness and either 325mm or 625mm with the optional body tube extender. Nose cone is about 165mm in length. Total length of the fin can and fins is about 215mm. Fin can was designed right side up, but needs to be printed upside down. Flip it 180 degrees in your slicer. The engine components consist of a threaded tube that the engine slides into...ejection charge end first. A threaded cap is screwed onto the end to contain the engine. There are two spacer donuts that need to be glued to the inside of the fin can. The one with the threads is glued up inside about 74mm for E engine installation, from its bottom edge to the bottom of the fin can. To do this, assemble the engine tube with an engine installed. Slide the donut spacer without threads over the engine tube and let it rest on the screw on engine cap. Screw the threaded donut onto the top of the engine tube and insert this whole assembly into the fin can. It is easier to apply super glue from the top of the fin can down inside and push the threaded donut into it from the bottom with the whole assembly. NOTE***Before you glue the engine assembly spacers in place, screw a small eye bolt into the small hole on the threaded donut spacer. Hook either a 18" or 36" steel fishing leader to it, then glue the spacer with the fishing leader eyebolt side facing the top of the rocket. This is for attaching the shock cord rubber band. Finish by gluing the other donut spacer flush with the bottom of the fin can. You can now screw the engine tube up inside the rocket and secure the engine with the cap at the bottom. These parts are probably consumable due to heat and you will have to print another engine tube and cap. Screw a small eye bolt into the bottom of the nose cone to attach the parachute and also a rubber band shock cord. Attach the other end of the shock cord to the fishing leader that comes from the fin can...up inside the body and out the top. Make sure to glue the fin can to the body. Might need to sand the nosecone a bit so that it slides easily on and off the body tube. Entire rocket without engine should weigh about 7.7 oz, or 9.9 oz. with the extended section.