After a little web research it appears that hot catalytic converters are
mostly, but not entirely, to blame. There's a little article on it
here:
http://www.westprint.com.au/cgi-bin/dada/mail.cgi/archive/Friday_Five/20
070706152512/
About 1/3 of the way down. The heading is "4WDs on fire".
For those who can't be bothered following the link, grass can also get
caught on the guard over the converter, and build up till it touches the
hot bit. Diesels are apparently a bit safer because they don't get as
hot.
This ignoramus will be a bit more careful about driving over long grass
in future.
Peter Shute
wrote on Tuesday, 4 September 2007
11:54 AM:
> Depends mainly on how dry the grass is, but yes, more likely
> to catch fire under your car if you stop. Then you've got twp
> problems - one is you've started a bushfire, and secondly
> your car could easily go up too.
>
> -----Original Message-----
> From:
> On Behalf Of Bill Stent
> Sent: Tuesday, September 04, 2007 10:20 AM
> To: Birding-Aus
> Subject: RE: [Birding-Aus] RFI: NW Victoria Mallee
>
>
> Could it happen in the short time while your car is passing
> over, or would you have to be stationary for the grass
> temperature to build up enough?
>
> If the latter, then the rule is to watch where you park.
>
> Bill
>
> -----Original Message-----
> From:
> On Behalf Of Tony Russell
> Sent: Tuesday, 4 September 2007 10:46 AM
> To: 'Peter Shute'; 'Chris Sanderson'; 'Birding-Aus'
> Subject: RE: [Birding-Aus] RFI: NW Victoria Mallee
>
> Very easily, in fact is one of the major causes of fire.
> It's the hot exhaust pipe which does it.
>
> -----Original Message-----
> From:
> On Behalf Of Peter Shute
> Sent: Tuesday, September 04, 2007 10:10 AM
> To: Chris Sanderson; Birding-Aus
> Subject: RE: [Birding-Aus] RFI: NW Victoria Mallee
>
>
> No idea. I assume that all cars must at least lightly brush
> against it, or it wouldn't get trimmed down like it does. I
> never thought of that aspect of it.
>
> Does anyone have any experience with this sort of thing?
> Under what circumstances can grass ignite under a car?
>
> Peter Shute
>
> -----Original Message-----
> From: Chris Sanderson
> Sent: Tuesday, 4 September 2007 10:22 AM
> To: Peter Shute; Birding-Aus
> Subject: Re: [Birding-Aus] RFI: NW Victoria Mallee
>
>
> Hi Peter,
>
> You say you had grass constantly brushing the
> undercarriage? As I understand it, that would make the
> Forester a considerable fire risk?
>
> Regards,
> Chris
>
>
> On 9/4/07, Peter Shute <> wrote:
>
> wrote on
> Sunday, 2 September 2007 7:25
> PM:
>
> > Some sites I've considered are Little Desert NP,
> Murray
> > Sunset NP and Hattah Kulkyne NP, but I'm open
> to suggestions.
> > I'll be travelling in a Subaru Forester, so I'd
> prefer to
> > stick to 2WD tracks where possible.
>
> A few years ago I drove around Little Desert a
> bit in a Forester. No
> idea where I really went or what birds were around - I
> wasn't birding
> then and was just having a look around. It did
> ok, considering we had
> no idea what we were doing, but having a lower clearance
> than most other
> 4WDs you have to put up with the continuous
> sound of the grass in the
> middle of the track brushing against the bottom. I
> guess if any car is
> going to to bottom out on the raised centre of the
> track, it will be
> yours. But as I mentioned, ours didn't hit anywhere.
>
> Peter Shute
> www.birding-aus.org
> birding-aus.blogspot.com
>
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