The carbon is classified by its thickness. Carbon-Honeycomb is our chassis material. A DC brushless motor is actually a AC device, running on 3 phase power. They contain strong permanent magnets, as opposed to the electro magnets of some motors. Hub motors are motors which are mounted directly on the wheel.
Normal motors require a drive train of some form, which results in a lower efficiency.
Since hub motors are mounted directly on the wheel, they require no drive train, and hence are theoretically more efficient then an identical non-hub motor. NGM makes hub motors for solar cars. Kevlar is an advanced textile with incredible tensile strength. It is woven into sheets. We then use two sheets seperated by a spacer, much like carbon-honeycomb .