- Thu Mar 20, 2014 11:25 am
#169583
I'm looking to build a unique RC car with motors in the hubs of the wheels. The wheels I have now are about 2inches in diameter and about 3/4 an inch deep. That leaves me with about 1.5 inches diameter by 1.25 inches in depth (it's okay that the motor sticks out of the wheel some what. Something in the style of a pancake motor would be perfect. Larger diameter but short body length.
I've looked through polulu's stock of motors and didn't find quite what I was looking for there. They have some small and torquey motors and small and fast motors and fast and torquey motors that aren't so small. I'm looking for the trifecta.
There are some other types of motors around that I don't know a lot about and could fit the bill. The problem with finding a motor on a random hobby site is that they don't have all the data that polulu has. (this is a major oversight in my opinion) For instance there is a type of motor out there called an inrunner (typically used for RCplane propellers) which is very small and incredibly fast and they say that it doesn't have a lot of torque but how much is not a lot? For the current draw it seems like it ought to have a decent pull.
I've also thought of steppers, which I know have a lot of torque, but I've never seen how fast they can be. IIRC a stepper motor us used inside a hard drive so 7200rpm, but that motor isn't propelling a pound or two of circuitry and batteries.
I was hoping for some replies from RC hobbyists who would know about inrunners, or anyone else who found a motor somewhere that seemed like it fit my bill. For right now I'm not worried about current requirements or voltage. I can figure that out later.
I've looked through polulu's stock of motors and didn't find quite what I was looking for there. They have some small and torquey motors and small and fast motors and fast and torquey motors that aren't so small. I'm looking for the trifecta.
There are some other types of motors around that I don't know a lot about and could fit the bill. The problem with finding a motor on a random hobby site is that they don't have all the data that polulu has. (this is a major oversight in my opinion) For instance there is a type of motor out there called an inrunner (typically used for RCplane propellers) which is very small and incredibly fast and they say that it doesn't have a lot of torque but how much is not a lot? For the current draw it seems like it ought to have a decent pull.
I've also thought of steppers, which I know have a lot of torque, but I've never seen how fast they can be. IIRC a stepper motor us used inside a hard drive so 7200rpm, but that motor isn't propelling a pound or two of circuitry and batteries.
I was hoping for some replies from RC hobbyists who would know about inrunners, or anyone else who found a motor somewhere that seemed like it fit my bill. For right now I'm not worried about current requirements or voltage. I can figure that out later.