B5M Chassis Brace With Fan Mount

[Erik Brewster]

The B5M has a problem with motors getting hot (compared to the rear motor version) because the chassis mount blocks airflow to the motor, when the motor temp is marginal. Making one with a fan mount would solve the heat problem.

I thought that 3D printing one should be easy. It turned out to be pretty tough because with a hole for the fan airflow, there isn't much room for the structure. After lots of optimizing, I came up with a design that is durable and have them printed at Shapeways. I've been impressed with the accuracy, appearance, and durability of the SLS Nylon at Shapeways.







https://www.shapeways.com/shops/eriksparts

[Aire valley]

Really neat job, well done..
Not really sure that it is necesarry though..? not had overheating problems and there is potential for vents in the bodyshell.

[Erik Brewster]

Originally Posted by Aire valley

Not really sure that it is necesarry though..

I've found that in 17.5 classes, the motors get pretty hot because gearing them up and using all the timing advance available is critical to getting good performance. There are certainly other classes that are not affected by this problem. I use one of these braces in my stadium truck to get more testing miles on it, but I certainly don't need the cooling.