Rubber Band Rocket Push-Button Launch Pad

prusaprinters

<p>A refactored launch pad for the <a href="https://www.thingiverse.com/thing:2753831">Rubber Band Rocket Mk ii</a> that prints as a <strong>single job</strong> and launches with a <em>spring-loaded</em> <strong>push button</strong>.</p> <h3>Back Story</h3> <p>I originally printed the <a href="https://www.thingiverse.com/thing:2753831">Rubber Band Rocket Mk ii</a> about a year and a half ago and, after some initial play, put it on the shelf...until...this year my 5th grader's class started studying 3-D printing is science.</p> <p>I lent it to her and she took it in to class where they had so much fun with it that they broke the launch pad.</p> <p>Instead of just re-printing the original, I went ahead and made some modifications.</p> <h3>Print instructions</h3><p><strong>Supports:</strong> Yes</p> <ul> <li>Supports are only needed for the pegs that lock into the rocket fins</li> </ul> <p><strong>Infill:</strong> 20%</p> <ul> <li>I always print with 3 perimeters with a 0.4 mm nozzle, so even though infill is 20%, most walls (including the armature and spring) are solid</li> </ul> <p>Note: Launch pad prints upside-down</p> <h3>Post-Printing</h3> <p>The moving parts (springs and launch armature) need to be jiggled loose from the pad after printing. I found that pushing on the armature from the inside toward the external button worked well.</p> <p>The hole is designed for pencils of 7 mm diameter or, if hexagonal, 7 mm across the flats (that's what I used).</p>