An animated helicopter pull, push, downhill toy. The main and tail rotors spin as this toy is pushed, pulled or sent down a hill. I printed the prototype gear trains in various colors and designed an open cockpit in order to highlight the operation of gears both beveled and linear to up and coming engineers.
Video of the prototype is here: https://www.youtube.com/watch?v=0c_GuncghxQ.
My wonderful wife, sister in law, kids, grandkids, nieces and nephews had fun producing the video and audio. Hope you and yours like it as did I. I'm printing more of these things for them, schools, and labs.
Designed using Sketchup Make 2015, and printed in PLA on a Makerbot Replicator 2 using Makerware 220.127.116.11 "Standard" Settings (.2mm layer height, 2 shells, 10% infill).
Supports are optional, depending on your printer and settings, for printing "Nose.stl" and "Tail.stl". Mine printed fine without supports.
Study "Assembly.skp" or "Assembly.stl".
Print all pieces as shown in "Assembly.skp" or "Assembly.stl". Supports are optional, depending on your printer and settings, for printing "Nose.stl" and "Tail.stl". My prototypes printed fine without supports.
Test fit and trim, file, sand, etc. all parts as necessary for smooth movement of moving surfaces, and tight fit for non moving surfaces. Depending on the colors you chose and your printer settings, more or less trimming, filing and/or sanding will be required.
Place wide rubber bands around the circumference of all wheels for traction.
Assemble as shown in "Assembly.skp" or "Assembly.stl".
Apply light machine oil on the moving parts.
To make a pull toy, slip a length of yarn into the lower front hole in "Nose.stl", tie a large knot, secure it with glue, then pull the yarn back so that the knot rests against the inside of the hole.
Once fully assembled, tested and aligned, a small dot of thick cyanoacrylate glue between the gears and axles will aid in holding the gears in position.
Feel free to comment if you have questions.
Hope you like it!
The more mistakes I make, the more knowledge I gain.