Hi all,
My dad had a wet start earlier today, which someone run up using there extinguiser (not me) to put the flame out. It turned out to be powder. I know Halogen does all sorts to metal, what about powder?
The engine at the moment is seized solid and seems to be a throw away job.
Needless to say my dad is pi$$ed off.

Laura

i will get the turbine a service!! send it to the manufacturer for an inspection..

i made that mistake with the first fire i had it needed new bearings and a full service.i dont use powder ones any more

Did not know this. What does it do?

Did you mean Halon?
If so Halon is probably the best extinguisher for these types of fires as Halon is an inert gas and will cause the least damage (if any at all) to a GT and the airframe.

Halon is used in computer installations because it will cause no damage to the computers if it is released.

You will also have a hard time finding a Halon extinguisher as they have been banned(?) because of their ozone layer destroying ability . There is a replacement though but I cant remember what it is called?

The next alternative would be a CO2 extinguisher, and use water if you have a grass fire.

Powder extinguishers are probably the worst next to stamping the fire out

http://www.h3r.com/halon/

Also
"halon
Organic chemical compound containing one or two carbon atoms, together with bromine and other halogens. The most commonly used are halon 1211 (bromochlorodifluoromethane) and halon 1301 (bromotrifluoromethane). The halons are gases and are widely used in fire extinguishers. As destroyers of the ozone layer, they are up to ten times more effective than chlorofluorocarbons (CFCs), to which they are chemically related.

Levels in the atmosphere are rising by about 25% each year, mainly through the testing of fire-fighting equipment. The use of halons in fire extinguishers was banned in 1994."

Problem is that the Halon extinuishers are not the inert gases we believe them to be..they are great for putting out fires with no colateral damage (I use them myself)...but in the process, they release some toxic gases......Fortunately in the middle of a hot start, most of us don't breathe anyways......

I am using the new generation halon, called Halotron. It is supposed to be more friendly without all the hazards of the original stuff. Have not got to use it yet knock on wood!

Chris

Dry Chemical is terrible on these models !!! Send that turbine in and youll probably need a complete rebuild, as dry chem is corrosive. The chemical itself is monamonium phosphate w/ a urea base to prevent clumping. if it got inside the Rx, or any of the ECU componets youll need to get those looked at also. when it sits on metal it will corrode it quickly, not like a strong acid, but what would normally take years will take weeks. I would get everything out electronic that you can, and you probably would want to look @ your gear and air systems also. If there is chemical on it blow it off. What a headache for a moment of panic !!!

Halon is # 1 but expensive as all get out to recharge. No residual and no reactive properties as it disperses quickly. Heavier than air so it will hug the ground in a release.

CO2 is probably the best for the hobby. inexpensive, and reaily available at most welders supply, or any where that deals with gasses. its only draw back is the temperature it comes out of the cone at and the fact for that nanosecond the watervapor it attracts. other than that no other complications.

Dry chem..... well only if you have to if your going to lose other property because of your fire, and the whole Jet is already written off.

The extinguiser was powder! The guy didn't know the damage it causes.

The engine looks like it is coated in sugar.

Removing the tail cone and boiling the kettle, pouring hot water through it has disolved away.

Extinguisers I know you use C02, I have fire extinguiser service guys come into my work and im given full C02 extinguisers. I know there is one that corrosive but i wasn't sure what it is!

Laura

Halon 1211-1301 is banned with the exception of aviation use. You can buy it for your private airplane. Our jets are indeed airplanes, and are privately owned. I had no problem ordering a Halon 1211-1301 extinguisher, and was never asked what the usage was for. So I guess if you still want a Halon extinguisher, its not a problem getting one.

My 2 Cents

Think CO2 and forget about Halon or Dry chemical.

With a CO2 if you get a hot start and need to just give the motor a shot of CO2 there is no need to service the extinguisher un true with the others.

Laura

I think you will need to disassemble the motor and clean it up. The Dry chemical has a way of coating everything.

Ian'

Just a quick note. It is legal to buy, sell and use Halon for any purpose in the USA. The Halon 1211-1301 blend units sold by H3R ARE for Aviation Use Only, but H3R also sells straight 1211 units online (http://www.h3r.com/products/home_vehicle.htm).

Halon is twice as powerful as the Halon alternative Halotron, and it is less expensive. Unlike C02, there is no danger of "cold shocking" electronics.

What is more, Halon is remarkably safe, as well as extremely effective. This is why it is required for commercial aircraft use.

As for dry chem extinguishers, I have heard of entire aircraft having to be scrapped due to corrosion from the powder after relatively minor fires.