Desktop Whomp Rocket

thingiverse

This easy-to-print desktop toy is a blast(off). Just slap the plunger down and the air-rocket launches into oblivion. Watch it go at: https://youtu.be/G7C68mPr0Vw Print with a 0.4mm line width. After printing, run the rocket up and down on the launch tube until it slides smoothly. Same with the plunger on the air-chamber tube. You can lubricate the both the launch tube and the air-chamber tube (inside and out) with a little vaseline for smoother operation. **CAUTION - HIGH SPEED PROJECTILE:** Do not shoot yourself in the face, or someone else in the face, or anywhere else, for that matter. **Notes on scaling:** If you want to scale this up, you need to scale the rocket and plunger by slightly different amounts from the launcher to maintain tight clearances. You can use the following formulas: LS = desired launcher scale factor (say 1.5) RS = rocket scale factor PS = plunger scale factor PS = 1.01444 x LS - 0.01444 RS = 0.95633 x LS + 0.04367 Or, just use one of these sets of percentage scalings: Launcher scale: 125%, Plunger scale: 125.4%, Rocket scale: 123.9% Launcher scale: 150%, Plunger scale: 150.7%, Rocket scale: 147.8% Launcher scale: 200%, Plunger scale: 201.4%, Rocket scale: 195.6% Launcher scale: 250%, Plunger scale: 252.2%, Rocket scale: 243.4% Launcher scale: 300%, Plunger scale: 302.9%, Rocket scale: 291.3%