Not meant to encourage anyone, just a more specific bit of information from a previous poster.
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My hibachi BBQ is 47 x 27 x 9 cm. Perhaps 1Kg of charcoal was all
that would comfortably fit. I lit it outside the car, and waited an
hour for the flames & smoke to die down and for it to turn white and
be glowing red. It was sparking little embers around at first, but
this died down. It's a new BBQ, so might have been because there were
still small bits of foam packaging in it. You can probably wait less
- it was the first time I've lit a BBQ so took a few goes.
I shut off the air vents in my car using the lever control. I did not
tape up any windows or vents. I placed two CO monitors between the
front-passenger seat and head rest (close to head height). One is an
industrial one (v. expensive) that detects up to 10,000ppm. The other
is the initial one I bought which only goes up to 1,000ppm. I put a
digital thermometer there too.
I have a supermini hatchback car. I folded down the back seats,
removed the parcel shelf, and laid a fire blanket (used for chip-pan
fires) across the floor of the boot. I also taped some tin-foil to
the upholstry above where I intended to place the BBQ for fear of
damage\fire - but this turned out to be unnecessary.
When the BBQ was ready, I opened the boot, placed it on the fire
blanket, in the middle towards the back of the boot, and shut it.
Temperature was 12c in the car before I put it in, CO was zero. I
stood outside the window and shone a torch inside to record the
following results for each 5 minutes:
0: 0ppm 12c
5: 2600ppm 20.7c
10: 4390ppm 32.3c
15: 5660ppm 39.8c
20: 6520ppm 44.3c
25: 7110ppm 46.8c
30: 7627ppm 48c
35: 7728ppm 48.3c
40: 7910ppm 47.9c
45: 7654ppm 47.2c
50: 7690ppm 46.3c
55: 7645ppm 45.1c
60: 7402ppm 43.9c
65: 7319ppm 42.7c
70: 7402ppm 41.6c
75: 7195ppm 40.5c
Satisfied that CO was high and sustained enough, I opened the driver's
door, switched on the engine & air-con and shut the door again. Door
was probably 75% open for 10-15 seconds.
76: 4100ppm 39.8c
80: 3937ppm 38.5c
85: 4110ppm 37.7c
90: 4233ppm 38.6c
95: 4260ppm 40.1c
Note the tin-foil I taped to the ceiling to protect the upholstry
above the BBQ dropped down soon after the BBQ was put in the boot
because the adhesive having melted. I was worried about this but
didn't see any discoloration or singeing of the upholstry. The heat
must dissapate around the car fairly evenly rather than cook one spot.
Overall, I'm happy with the test, although it does get a bit toasty!
I wanted to see CO sustained above 4,000ppm for 30mins to an hour. I
don't want any half-measures leaving me brain damaged. The cheap CO
monitor hit 999ppm after a few minutes and stayed there for the
duration. My aircon was no match for the heat from the BBQ, you can
switch it on if you want, but I don't think it will make more than one
or two degrees difference. Your car might have better air-con than
mine though. I might try bringing an ice box. I've heard that death
typically takes 30 mins in 4-5,000ppm, so hopefully I'll be asleep
after 5-10mins, well before it hits 45c+
The other slight problem was the location got a bit busy, so I'll have
to find somewhere quiter or do later at night. Don't want any misguided heroes.
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I also know that 'merope'-story and can recommend to read it in full on the net.
Its informative and witty.