ZF 3 The 100% 3D Printed Rocket

thingiverse

Hi my name is Zander, for weeks I've built three model rockets using 3D Printing. Why? Because rockets are incredibly cool! This is the third revision and the first public version. The rocket uses one C6-7 Rocket Motor. This rocket does not need superglue unless you add a parachute or glue the motor to the engine compartment and the EC to the Body tube, which adds more safety and makes the craft more rigid recommended. The craft flies very stable at high speeds. The center of mass is also quite low, so you can put weight anywhere above the Engine Compartment without messing it up, giving the rocket even better flight characteristics! So feel free to stick in a parachute and some altimeters and have fun! BTW the circuit diagram is for an igniter if you're interested. I left out resistor values for the LED; 360 Ohms will do. Print Settings Printer Brand: RepRap Printer: Prusa I3 Rafts: Yes Resolution: 0.25 Infill: 25% for Engine Compartment, 100% for everything else Notes: I'll be adding different size engine compartments for different motors, so use your best judgment when choosing infill for them. Post-Printing Finishing Some sanding or gluing may be needed for loose or very tight clearances. How I Designed This When designing this rocket, I used Autodesk Inventor 2017, a calculator, and lots of Google. The fins are large to put the center of mass above the center of pressure because having the COP above the COM makes the rocket unstable, and it will almost certainly fly with a dangerous unpredictable flight path. I also took into consideration engine sizes when designing my engine compartment so that a larger or smaller motor may be used if needed. Custom Section How to Calculate the Height of a Rocket Using Trigonometry Here is a video to help you understand how to calculate the height of the rocket. You will need a tape measure and a movable protractor with a sight.