Motorcycle Mojo – July 2019

(avery) #1

the engine and suspension are hung.


It’s a true monocoque, too, with the


24-litre fuel cell integrated into the


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monocoque is a fully enclosed shell to


which the engine is attached at four


points on either side – at the front and


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and low down on the gearbox. Since the


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couldn’t use pre-impregnated material,


because the complicated shapes of the


stylized monocoque made draping wet


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own vacuum oven to cure not only


the monocoque but all the many other


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which are made by BST in South Africa.


“There wasn’t an oven big enough


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Rolf. “It’s not pressurized, so it’s not a


true autoclave, which is vacuum plus


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the monocoque correctly – you have


to vary the temperature quite a bit and


you have to slow it down to ensure that


every molecule is completely cured. We


made a lot of practice runs before we


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but even so it was a critical moment,


and we were pretty relieved it came out


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spring, and delivering 120 mm of wheel


travel. Up front, Rolf used his own


variation of the double-wishbone girder


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A Most Unique Suspension


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principle in carrying the front wheel


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that pivots in the monocoque with twin


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fully adjustable for spring preload and


damping to deliver 110 mm of wheel


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the copycat BMW Duolever, the front


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lengthwise through the top of the


monocoque beneath a plexiglass cover


and is connected via a short rod (with


adjustment to vary the ride height front


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which sits in line with the front one.


Steering geometry is relatively con-


ventional, with a 24-degree head angle


(it’s variable over a 16- 30-degree range)


and 100 mm of trail, which, Rolf says,


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minutes to change the head angle.


“We use a double wishbone front


suspension because you get more


adjustability than with an upside-down


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control,” says Rolf. “And the nicest


thing about this system is that the forces


cancel each other out, and this reduces


stress on the monocoque and allows us


to save some weight.”


Rolf continues: “But the most inter-


esting thing about the front suspension


is that we can adjust it any way you


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and replicate the traditional telescopic


feel, or we can give you anti-dive


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THERE WASN’T AN


OVEN BIG ENOUGH IN


THE NETHERLANDS


THAT WE COULD USE,


SO WE HAD TO MAKE


OUR OWN


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Free download pdf