F4006-740KV Brushless Outrunner Motor

• Are you finding your weapon motors under-powered? Are you looking for a motor that can handle absurdly large blades without breaking a sweat? Introducing our new F4006 740KV Brushless Outrunner!
• This is our most powerful motor yet! It can run on 4S batteries, and draw up to 40A.
• Don’t let its shockingly low profile of only 20mm fool you, this motor can take a serious beating with a thick 4mm shaft.
• Easily drive this motor with the BLHeli 40A brushless esc.

Brushed vs Brushless

In case you’re wondering why brushed vs brushless, here’s a great article that explains the difference and when to use each: https://www.arrow.com/en/research-and-events/articles/powering-a-battlebot

Here’s another: https://battlebots.fandom.com/wiki/Brushless_vs._Brushed_Motors

Brushless motors are almost universally used for weapons motors, for the reasons listed in the article. Brushless motors are used as drive motors for the very large combat bots as well.

Brushless Motor Confusion

But wait! These articles talk about how brushless motors are more efficient than brushed motors! Why do brushed motors dominate smaller bot classes as drive motors?

Some simple reasons:

1. Brushed motors are generally much cheaper.
2. They have more power and torque at low speeds.
3. Controllers only require two wire connections and simpler, less expensive controllers.
4. All of the above means a lower cost and weight penalty.
5. Most importantly, adequate drives with the right gearing and price point are generally much less available in form factors suitable for drive motors in smaller bots.