Nerf Rival Flywheels and Cage

thingiverse

This is a flywheel cage and flywheels for a brand-new Rival style blaster. This design will not work in any current production model. Instead, it's intended for a future blaster I'm currently designing. Feel free to use this as you see fit. Keep in mind that this is still a working piece, but it's evolving rapidly. Some features might seem out of place at the moment, but they'll make sense in the larger scheme of things. Wheels: Print these with the highest resolution possible. My wheels were printed at .06mm layer heights and 50mm/s outer shell speed. The more precise your print, the better it will turn out. You may need to ream the holes to 2mm since they can be tricky to print. Use a drill or a legitimate reamer to avoid over-boring them. A 2mm or 5/64" diameter hole works great. Cage: You'll definitely need to use supports for this part. Lay it with the open face up, so that the motors bolt on from underneath. When using Cura, the supports will pop out of the motor mount holes fairly easily and can be cleaned off the mounting tabs without much trouble. I printed this at .15mm layers and 50mm outer shell speed. I highly recommend using a rigid plastic for both the flywheels and the cage. PLA has worked well for me (using Solutech 1.75mm at 210C), but you can experiment with other materials if you'd like. The motors are secured with 2.5 x 6mm screws, so I recommend stocking up on those if you plan to follow this project. Assembly: Insert the motors and secure them down with the screws. Then, place the wheel on the shaft and push it flush using a flat surface. You can glue them together if you'd like, but try not to glue the motor solid. The wiring is relatively straightforward. I used solder and electrical tape. If you're unsure what goes where, just plug some wire into the battery terminals and experiment until you get it right. Don't short circuit anything – that'll create an instant fire. You've got two parallel motors here, one of which has switched polarity. You could add a switch, but this was designed to be plug-and-play on different blasters, so it might not work in the future. Use wire that won't melt when plugged in. Safety: I'm not responsible for whatever you stick into this thing. It's fast, it's got torque, and it'll melt or burn your skin if you're not careful. This was only designed to shoot Rival balls, but it might also work with mega darts (though I haven't tested that yet). Keep in mind that this is significantly more powerful than a standard Rival gun – roughly 120-130fps. Larger wheels and motors on a battery like this have serious potential. Please be safe with it. It can shoot cheese balls too. What I used: * Battery connectors: https://www.amazon.com/gp/product/B00XQ91998/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 * Battery (use whatever you want): https://www.amazon.com/keenstone-Butterfly-Nunchuck-Connector-Discharge/dp/B0132TPIBQ/ref=sr_1_4?keywords=airsoft+battery+9.6v&qid=1553209103&s=gateway&sr=8-4 * Motors (5 pack): https://www.amazon.com/gp/product/B01M0XOOS5/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 * Screws: https://www.amazon.com/gp/product/B072NZY69F/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1