Interferance

[gavin de vries]

Hi Guys

Wondering if anyone can give advice.

I am running a ofshore v hull with a 25cc cy motor,at this weekends
racemeet I started to get interferance.
This eventualy resulted in a runaway,after checking all the obvious
things I tried again,done about 7 laps no problem,then it locked into a
tight circle.
Luckily I was able to shut it down.

The question is now where and how does one start looking for the
problem without just replacing things,at a relativly high cost.

Thanks
Gavin de Vries
South Africa


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[deestingray]

Obviously you have checked both RX and TX batteries, that is usually
where I would start. Sometimes if you have your receiver too close to
a servo, you will get interference, do you run an FM or AM radio??
Generally the AM is more prone to random bouts of interference, FM not
so much however I have heard some pretty good things from the Spectrum
radios at 2.4ghz.
I have also read from some of the flying guys that if you have a
frequency really close to anothers frequency that is running with
you(within 1 number either side of yours), there can be clashes there
too, so as a result, they only allow every second numbered air
frequency to be used.


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[gavin de vries]

:confused: deestingray

I have a SANWA M8 radio with a sanwa 40 mhz reciever,I also have a
Spectrum 2.4ghz module that fits onto it.However I have been advised
against using it in a boat with a spark ignition.However it used to
work great in my r.c. cars.Do you reckon its worth giving it a try,at
this stage I dont think I have much to loose.

Cheers
Gavin


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[Jim]

You need a shielded spark plug cover! The alternative is a PCM radio.

"gavin de vries" <gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au>
wrote in message
news:gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au...
>
> Hi Guys
>
> Wondering if anyone can give advice.
>
> I am running a ofshore v hull with a 25cc cy motor,at this weekends
> racemeet I started to get interferance.
> This eventualy resulted in a runaway,after checking all the obvious
> things I tried again,done about 7 laps no problem,then it locked into a
> tight circle.
> Luckily I was able to shut it down.
>
> The question is now where and how does one start looking for the
> problem without just replacing things,at a relativly high cost.
>
> Thanks
> Gavin de Vries
> South Africa
>
>
> --
> gavin de vries
> ------------------------------------------------------------------------
> gavin de vries's Profile:
> http://www.modelpowerboat.com/forum/member.php?userid=2632
> View this thread: http://www.modelpowerboat.com/forum/showthread.php?t=547
>

[qrst228]

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--
qrst228


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[Jim]

Is your ignition shielded...specially the spark plug? Ignition engines can
give radios fits. One solution is to use PCM rather than PPM

"gavin de vries" <gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au>
wrote in message
news:gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au...
>
> Hi Guys
>
> Wondering if anyone can give advice.
>
> I am running a ofshore v hull with a 25cc cy motor,at this weekends
> racemeet I started to get interferance.
> This eventualy resulted in a runaway,after checking all the obvious
> things I tried again,done about 7 laps no problem,then it locked into a
> tight circle.
> Luckily I was able to shut it down.
>
> The question is now where and how does one start looking for the
> problem without just replacing things,at a relativly high cost.
>
> Thanks
> Gavin de Vries
> South Africa
>
>
> --
> gavin de vries
> ------------------------------------------------------------------------
> gavin de vries's Profile:
http://www.modelpowerboat.com/forum/member.php?userid=2632
> View this thread: http://www.modelpowerboat.com/forum/showthread.php?t=547
>

[Jim]

yep

"Jim" <jim@slaughter.org> wrote in message news:8XuCj.3$Nr1.0@trnddc01...
> You need a shielded spark plug cover! The alternative is a PCM radio.
>
> "gavin de vries" <gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au>
> wrote in message
> news:gavin.de.vries.361ra6@no-mx.forums.yourdomain.com.au...
> >
> > Hi Guys
> >
> > Wondering if anyone can give advice.
> >
> > I am running a ofshore v hull with a 25cc cy motor,at this weekends
> > racemeet I started to get interferance.
> > This eventualy resulted in a runaway,after checking all the obvious
> > things I tried again,done about 7 laps no problem,then it locked into a
> > tight circle.
> > Luckily I was able to shut it down.
> >
> > The question is now where and how does one start looking for the
> > problem without just replacing things,at a relativly high cost.
> >
> > Thanks
> > Gavin de Vries
> > South Africa
> >
> >
> > --
> > gavin de vries
> > ------------------------------------------------------------------------
> > gavin de vries's Profile:
> > http://www.modelpowerboat.com/forum/member.php?userid=2632
> > View this thread:
http://www.modelpowerboat.com/forum/showthread.php?t=547
> >
>
>