I have a brushed motor lying around that I didn't want to throw out, so I thought I might use it for a plane
The motor is rated at 1.5-9V, so I'm going to power it using a 2 cell lipo battery. It can only produce 7400RPM, but a lot of torque. I want it on a plane flying wind, for which I would prefer low-speed, efficient thrust rather than outright speed. I guess I should go with a lower pitch prop?
These are low power units, a few watts max I would guess based on specs of similar sized motors. Being generous and assuming 5 watts, with 50 watts per pound being the lowest power to weight for flight, your plane could be no heavier 2 ounces. The motor itself is approx half an ounce.
Not saying it couldn't be done , it's just gonna need to be really light. Also will probably have to use a gearbox to get a small prop to spin fast enough.