> As far as the spark jumping the relay gap (if for some reason you cannot
> gain access to a low voltage section of the circuit) you could
> use more than
> one contact/relay: wiring the contacts in series will quickly
> reach a "safe"
> distance...

        True, that is something to consider.

> Other thoughts;
>   * is there an air intake (or exhaust) port that could be
> blocked? doing so
> could do the job.

        Yes, this is a possibility, but I'd love to do it with as few moving parts
as possible! :)

>   * how about interrupting the mechanical coupling between the wheels and
> the engine?

        Nope, it's a direct connection (there is a cenralfugal (sp?) clutch but it
cannot be controlled)

>   * for really fast stopping of the engine you could cause the
> piston/cylinder to try to act on something less compressible -
> such as water
> by using a car windshield washer fluid pump with a small
> reservoir and hose
> directed into the intake... though this might be too drastic.

        An interesting idea, but I'd rather not pour water in unless I have to! :)

>   * you might want to reconsider changing the steering wheel
> direction as a
> fail-safe - would be messy if it intermittently activated while moving at
> speed in close quarters or near people... I'd lock the wheels
> as-is until a
> valid steering signal is received...

        Actually this is already planned, in the case of transmitter contact loss
the steering will steer all the way to one direction, haven't decided which,
flip of a coin perhaps? :) Thanks for the suggestions. TTYL

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