[MetalMan]

Don't apologize, we're all here for a good reason! And that reason is to receive comments, ask questions, show off, etc.

In this application outrunners are easy to use because their shafts are removable, and thus easy to modify. We need to somehow get driveshafts or drivecups onto the ends of the motor, and traditional inrunners have the shaft exiting only one side of the motor. That means inrunners require some sort of (reduction) unit that can send power to the front and rear. This unit adds weight and complexity and reduces available space.

If I were to ask a company like Medusa or Neu to build me a custom inrunner with a kv of about 750 and a shaft with appropriate connections on both ends of the motor I would have to dish out a lot more cash than I can afford. Also keep in mind that these motors are 4pole, so compared to 12pole outrunners they might provide less back-emf at startup , potentially making them more prone to severe cogging. Outrunners are much more friendly to user-rewinding as well, so I can always use heavier gauge wire and have a higher total copper fill than what factories put on their outrunners (to make them handle more power).

The KMS was definitely overstressed, as is evident in the pictures. A comparably sized inrunner to that KMS would weigh about twice as much, meaning it would have more copper and a higher current capacity. This Scorpion motor I got is nearly 100grams heavier than the KMS, and has A LOT more copper and is also better built. Hopefully it won't be too heavily stressed.