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Tim Bump who heads up the Hyper Racing division at OFNA has been working closely with the HoBao engineers on the design of the Hyper 9, which is the car that the HoBao racing team will be fielding at the IFMAR 1/8-Scale Off-Road World Championships. The Hyper 9 will be the first car that’s entirely designed by OFNA. The car featured here is a prototype, but as you can see the design is radical when compared to other buggies. Let’s take a closer look at some of the car’s innovative features.
All of the vehicle’s components are as close to the centerline as possible. You couldn’t stick a pencil in any of the gaps between the various components! The buggy is extremely narrow; the chassis width is only slightly wider than a 1/10-scale buggy.
The engine is leaned inward 25-degrees, which allows it to be mounted closer to the centerline. The engine is one of the heaviest components, and having it mounted in the center provides an almost perfect left-to-right weight ratio. In fact, OFNA claims that the left-to-right ratio is identical when the fuel tank is half full.
The steering and throttle servo are both mounted flush with the chassis. The throttle servo uses a bellcrank to open and close the slide carb. As you can see, the bellcrank is angled 25-degrees so that it is on the same plane as the slide carb. The receiver/battery box and right mud guard is a single molded piece. The Hyper 9 has a super small 40-tooth spur gear, which lowers rotating mass. Check out the brake linkage; a single, straight link operates the front brake rotor that’s mounted conventionally in front of the center diff. Where’s the rear brake you ask?
There it is! It’s mounted in front of the rear differential. Adjusting the front and rear brake bias is easy since there’s only one brake linkage.
The Hyper 9 uses a C-hub front suspension, but it’s hardly conventional. The steering knuckles are tiny compared to other buggies. The steering bellcrank system has also been simplified; it uses a rod to connect the two bellcranks together and different rods will be included to adjust Ackermann.
This flipside view gives you an idea as to how narrow this buggy is. The mud guards are tiny compared to other buggies. Although you can’t really notice in this photo, the mud guards are angled upward all the way around the parameter of the chassis to improve ground clearance and prevent them from scraping while cornering.
The wing and wing mount are a single molded piece. This reduces weight because there are no screws required to mount the wing, and there aren’t posts between the wing mounts. OFNA will offer a conventional wing mount for those who’d like to mount an aftermarket wing.
The low-profile fuel tank is mounted super close the chassis centerline. It will have molded-in fuel line clips for a neater fuel line installation. The production buggy will have a splash guard to keep fuel from contaminating the front brake rotor.
OFNA will debut the new buggy at the RCX show in Pomona in a few weeks, and we should have a test sample by then too. Of course we plan to review the new Hyper 9 buggy as soon as we get our hands on one so be on the lookout.