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From: "Greg Ward" <gregw@onestopdesign.biz>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3744845@logan.com>
Subject: Re: [FlyRotary] Re: Fire Shield or Heat Sheild [FlyRotary] Re: P MAlternator Project
Date: Sat, 4 Jul 2009 09:49:03 -0700
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Is Anti-Freeze flammable????
Greg Ward
Lancair 20B in progress


----- Original Message ----- 
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, July 04, 2009 9:32 AM
Subject: [FlyRotary] Re: Fire Shield or Heat Sheild [FlyRotary] Re: P 
MAlternator Project


> Bob Perkinson wrote:
>> The best fire suppression system is just plane water.  Before I
>> retired we replaced all of our CO2 fire suppression systems with high
>> press. water mist.  30 gal of water replaced 6 150# CO2 bottles.  The
>> idea is the water will spray out in a fine mist and instantly turn to
>> steam, this removes the heat from the combustion and also displaces
>> the air.  I know that displacing the air would be hard to do in a
>> moving aircraft but removing the heat would definitely put out the
>> fire if the mist were spraying on and in the area of the exhaust this
>> may prevent what ever fluid is leaking from re-combustion.  A high
>> press. water system big enough to be able to do this would be weighty
>> and take up a considerable amount of room (Water container + high
>> press. gas cylinder plus high press piping and spray nozzles.)  I am
>> not sure how to figure the  btu's stored in the exhaust system, but
>> fairly sure that it would be a function of the mass of the eshaust
>> system and the temp. of the metal, this would dictate how much water
>> would be neede to remove this heat.  Water would have to be kept above
>> freezing, this throws another kink in the logestics of this type of
>> system.
>> Somone out there may have an idea on this and how to make this a
>> practical system.
>>
>> Bob P.
>
> Most of us rotary guys already carry a water reservoir that is protected
> from freezing.  If your engine compartment is on fire, you probably
> won't be overly concerned with the internals of your engine getting to 
> hot.
>
> You just need a way to mist the water.  I suggest an unregulated fuel
> pump into some metal tubing and out through three or four strategically
> placed agricultural misting nozzles.
>
> The cooling system only uses a few quarts, but how many do you need once
> you cut the fuel supply?
>
> -- 
>
> http://www.ernest.isa-geek.org
>
>
>
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