[geeks] Diesel test revisted

[Mark]

On 25 Oct 2007, at 22:59, Shannon Hendrix wrote:

> Question 7: I think they have this wrong.  They say that D is reverse
> and A is reduction.
>
> I disagree, depending on the overall design of a transmission.  The
> problem with this question is that it really can't be answered.  Gear
> A reverses direction and does reduction.  Whether or not it results
> in reverse travel depends on the rest of the system.

I'd agree with you, for example, Yamaha MotoGP use a reverse-cranking  
4-cylinder in-line engine in their racing motorcycle (the YZR-M1, as  
ridden by Valentino Rossi, Colin Edwards and others). They use an  
intermediate shaft that acts as a balancer shaft to counteract the  
irregular firing of the engine, but ALSO, critically to this case, it  
sits between the crank and the gearbox drive to produce *forward* drive.


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Mark Benson

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