Castle 1717 Cooling Fan Shroud - 40mm and 30mm Fans - (Remixed)

thingiverse

UPDATE 2022.01.23: I added a reinforced base at the far cantilevered end of the motor to help absorb shock on hard landings. This was only done to the 40mm XL version as that is what most people are using. UPDATE 2021.11.20: I've added an "XL" version that has a much larger jacket size based on [some feedback from the Arrma forums](https://www.arrmaforum.com/threads/castle-1717-cooling-shroud-fits-kraton-etc-for-40mm-and-30mm-fans.45643/post-641241). The update increases flow rate and cooling and has clearance for the propshaft, diff mount cover, and side skirts. ORIGINAL: A cooling system that works! Supports 30mm or 40mm fans. Most approaches use fans blowing on one side, or poorly coupled heatsinks. The mighty Castle Creations 1717 is powerful but runs hot! This shroud keeps it cool. Features: 1. The shroud forces 100% of the fan's air directly to the body of the motor and exhausts out the bottom -- no bypass, and uses all the surface area of the motor body 2. The shroud simply slips on and is securely held in place with a ring that locks in between two of the motor cooling fins 3. The AC input posts are covered to avoid shorts with the cover held tight win an (optional) strap 4. The AC wires are managed with a set of knuckles that keep them from moving around during bashing 5. The sensor wire has a guide channel to keep it from getting snagged on things. You can also put the motor wires in the guide too No more cooling issues, and a very tidy install as well. Confirmed to fit on the Arrma Kraton, but likely on any Arrma 1/8 or 1/5 scale car. Not sure about other brands, but if chassis plate clearance is an issue you can simply use Meshmixer to cut 1-2mm off the bottom of the shroud. The fans install with M3 fasteners and tap directly into the TPU. Print vertically with supports. This may be a challenge for some printers, use 0.1mm support interface spacing to help keep the edges clean. Inspired by a [40mm shroud design](https://www.thingiverse.com/thing:4736620) but I decided to start from scratch in Solidworks. Enjoy!