Weekend dive

[JD]

After the weekend dive on the Lumb and Seawolf, I had a thought. I have an old BCF fire extinguisher here at work, from god knows where. I am thinking about taking it on a dive and setting it off underwater and seeing how far (if at all) it propells me underwater. Might make a mess to the vis (I have NFI what is actually in a BCF extinguisher, is it just gas?), things may well go wrong in a big way or it may just be a giant fizzer (Ha ha!) and nothing happens.
Anyway, I am keen to see what happens, as I am sure you all are too. Tickets will be on sale through the FUJAK Box Office shortly.

JD

[Craig]

It'll contain Bromochlorodifluoromethane (hence BCF) & according to Wiki it's a.k.a. Halon or Freon. I believe it's a gas under pressure that comes out as a liquid which evaporates off without leaving any residue. I used to use Freon for cleaning electronic parts as it is not electrically conductive & 'clean'.

Problem is it blows holes in the ozone layer so is banned. Just like the little cans of Freon R12 I used to use to regas my own car a/c system.

So, as it relies on being under pressure, no idea what pressure, I'd expect that its effectiveness for propulsion would depend on the pressure differential between the extingusher & that of the water in which it was discharged. Best do it in the shallows or even better write to Mythbusters & get them to do it.

C

[ph]

i see things have changed on a PADI deep course these days....once upon a time we would open a can of coke....FE extreme but hey maybe affective

PH

[JD]

I was thinking about doing it in the shallows, but not for the reasons of safety..... I figure the deeper we go, the greater the surrounding water pressure is, therefore the difference between the pressurised gas inside the cylinder and the surrounding water is less, resulting in less of an effect. Then again, is the deeper water slightly more dense, creating a harder 'wall' which the gas has to push through, thereby creating more thrust..... FIIK. Where is Ian when you need him?

JD

[ph]

 Where is Ian when you need him?

JD
[/quote]


in more shit than a Werribee duck from what I here.......(but I also take gossip with a grain of salt)

[onwardsupwards]

Where is Ian when you need him?

JD

in more shit than a Werribee duck from what I here.......(but I also take gossip with a grain of salt)
[/quote]

I thought Werribee was one of your higher class suburbs 

[ph]

Where is Ian when you need him?

JD

in more shit than a Werribee duck from what I here.......(but I also take gossip with a grain of salt)

I thought Werribee was one of your higher class suburbs 
[/quote]

rick have you ever had a big holiday and been to melb

[onwardsupwards]

Where is Ian when you need him?

JD

in more shit than a Werribee duck from what I here.......(but I also take gossip with a grain of salt)

I thought Werribee was one of your higher class suburbs 

rick have you ever had a big holiday and been to melb

/quote]

Thought about going to Melbourne, for a split second, but with the following attractions

Toll roads complete with traffic jams
Shit weather
Overpriced wannabe restaurants

decided that some cave diving in the Lot region of France was a more attractive proposition.
Was a tough choice to make though 

Will post some pics on return.

[rob b]

well whats the goss on Ian.

[Craig]

well whats the goss on Ian.

Theologically clashing with his inner nerd I think

[onwardsupwards]

well whats the goss on Ian.

Theologically clashing with his inner nerd I think

I'm betting on the inner nerd winning every time.