--- Marty Hewes <
[email protected]> wrote:
> That's fine for a street bike, but I see two
> problems on a race bike.
> First, you need simultaneous brake and part throttle
> to do a burnout to warm
> the tire. With a little logic you could just
> trigger the cutoff from the
> rear brake, but then you still have the problem that
> Killacycle can go a
> long way in the time it takes the rider to get off
> the throttle or hit the
> rear brake. Something that can go 0-60 in less than
> a second really needs a
> safety that takes the rider out of the loop, or just
> never attempt a burnout
> without a long shutdown lane.
>
> In Bills case, as I understand it, the problem
> wasn't that the motor didn't
> shut down when the throttle was released, it was
> that Bill had to release
> the front brake to twist the throttle back, and that
> reaction time delayed
> that action. Many people probably would have frozen
> faced with the decision
> whether to release the brake to kill the throttle or
> just squeeze the brake
> harder, which might have made things a whole lot
> worse. That's a decision
> that ideally the rider shouldn't have to make in a
> split second.
>
> Another issue might have been the type of kill
> mechanisms used. There are
> two types. Those that kill the drive if the rider
> takes some action (like
> push a button), and those that kill the drive if the
> rider doesn't maintain
> some action (like a button needs to be held down to
> continue). That still
> wouldn't eliminate the reaction time, unless the
> rider lost his grip.
>
> I really think that if burnouts are going to be done
> anyplace but on a drag
> strip, some sort of traction or distance sensor kill
> system must have
> automatic override capability. I suspect that a
> current sensor could be
> used to detect a level of motor current that
> indicates too much traction.
>
>
> ----- Original Message -----
> From: "Mark Hanson" <
[email protected]>
> To: <
[email protected]>
> Sent: Monday, September 17, 2007 8:07 AM
> Subject: [EVDL] Throttle cut-off
>
>
> > Hi,
> >
> > My hat's off to those who race and push the
> envelope as that inproves the
> > technology for everyone.
> >
> > With the recent buzz about Bill's mishap, I was
> wondering if it has a main
> > contactor shut-off that inherently kills the power
> to the controller
> > everytime the throttle is released. On something
> that goes this fast it
> > might be a good idea to wire the contactor to the
> brake light switch as
> > well. Just a safety thought, I've been doing this
> on all my EV throttle
> > controls since the 70's.
> >
> > Although all my conversions have been lowly to &
> from work commuters, I've
> > ridden a motorcycle for 35 years and it's possible
> that on quick
> > acceleration, the throttle grip gets pulled back
> so having a direct brake
> > peddle contactor controller shut off might be a
> good addition to a race
> > bike.
> >
> > Have a renewable energy day,
> > Mark
> >
> >
>
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>
>
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>
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harry
Albuquerque, NM
http://geocities.com/hendersonmotorcycles/blog.html
http://www.austinev.org/evalbum/1221
http://geocities.com/solarcookingman
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