Paper Plane Lancher

thingiverse

Fun little paper plane launcher I built with my kids this weekend. What you will need: * Makeblock set * 25mm DC engines (lowest gear ratio you have), 4mm axis. I am using Polulu, 12V HP 4.4:1 (https://www.pololu.com/product/3201) * Battery (depends on engine, I use an 11.7V LiPo battery) * Assorted screws * Two of each of the printable parts * Two O-rings (R-32, I/D 50.39 mm, O/D 57.46 mm, Section 3.53 mm) I printed mine with both extruders at the same time to save time, and didn't have patience to switch out the color - that's why half the parts are black and half the parts are white. Build notes: * Print two of each part. * Build the Makeblock structure as shown in the images. * Mount the DC engines loosely in the motor brackets and the brackets on the structure. * Put the O-rings on the wheels, and the wheels on the motors. * Adjust the distance between the motors until the O-rings, at most (when turning them), very slightly touch. * Remove one wheel and verify the direction of the other, then switch and verify direction of the other wheel (when the battery is connected), then wire it all up (I put a switch on it, to the delight of my youngest kid). * Make sure to adjust the distance between the motors so that the O-rings just meet - too close and the rig will vibrate a lot. In the pictures, they are _too_ close to each other. * Mount the runway parts. * Having around 7.5mm distance between the runway parts seem to work well. Here is a (very) short video of me launching one: https://youtu.be/dZiiq_Z4jpU