The rear single disc on the transmission will be doubled up using the kit front disc, leaving no transmission-mounted disc on the front. The Hyper-7 buggy chassis is fully prepared to accept this modification as the Hyper-7 Pro version comes like this as standard, but with 2 discs on the front too. Instead of having this, I will have a single wheel-mounted disc on each of the front wheels of the truck. This way, under heavy braking, there will be no stress on the front transmission lines of the vehicle: especially important when I have the extra weight of 2 engines on board.
The front discs will be about 3" in diameter, and cut from fibreglass sheet using a hole saw. The centres will be milled to fit the wheel adapter hexes, which will also be custom machined to 14mm to accept T-Maxx wheels. The standard 1:8 buggy hexes that come with the kit are 17mm and are too big for the T-Maxx road-rollers I want to use. All up, this will give me a 'floating disc' design with a machined aluminium caliper bolted to the steering knuckle and a single moving pad, actuated by a cam as like all discs in RC cars. The outboard nature of these brakes means they will have to be cable, rather than rod, actuated. I will use bicycle gear cables for this, they are thinner and more flexible than brake cables. |