[Vwdiesel] Re: cleaning fluid for jet turbines

[McCanless, James]

I spent a short time as a Flight Engineer on the MH-53J Pave Low III
helicopter. http://www.af.mil/factsheets/factsheet.asp?fsID=117
We kept our EAPS (Engine Air Particle Separator) doors closed almost all
the time. If you were at altitude (for a helicopter 8-10K) you would
open them for efficiency, but most of the time was spent close to terra
firma and they stayed closed. You could pull 8-12% more power with them
open.

Troy

-----Original Message-----
From: vwdiesel-bounces+james.mccanless=lmco.com at vwfans.com
[mailto:vwdiesel-bounces+james.mccanless=lmco.com at vwfans.com] On Behalf
Of Val Christian
Sent: Wednesday, July 28, 2004 10:19 AM
To: vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] Re: cleaning fluid for jet turbines


In the PT6-114a, they use water with a wetting agent (detergent).  There
is a garden hose like adapter to bring it into the engine.  Our tech 
hasn't gone to school on this, so I don't have all the specifics. In
general, the walnut blast, and the water blast are not, ahem, routine 
maintenance.  

I think the issue is that fine dirt builds up on the blades, affecting 
their efficiency.  

My guess is that the helicopter guys would see more of this.  Then
again, their intertial separators may be on constant use, so it may not
be as much of a factor (except the fines will still get through).  

On my aircraft, the separator is only turned on when you encounter
adverse conditions (like icing), and then it's kept on until after
shutdown. There's some small (max 3%?) drop in efficiency as a result.

Val

> 
> I also have indirect experience with this. I worked on cruise missiles

> for 15 years and we never did anything like this, but while I did a 
> couple of years in Quality Assurance, I became good friends with the 
> jet engine mechanic. He said during Desert Storm while working on the 
> B-52 the were at Diego Garcia. Not having all the facilities of their 
> home base to do proper preventive maintenance the had do resort to 
> other measures. They would take ground up charcoal briquettes and with

> the engines at idle toss the charcoal powder in the intake. It would 
> restore power similar to a water wash and trim would after and engine 
> change.
> 
> Troy
> 
> P.S. How many have used the Optima Batteries in your diesel and are 
> you pleased with the performance.
> 
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
> On Behalf Of HWY9FERGS at cs.com
> Sent: Wednesday, July 28, 2004 12:37 AM
> To: vwdiesel at vwfans.com
> Subject: [Vwdiesel] Re: cleaning fluid for jet turbines
> 
> 
> Hi all, Believe it or not, I have some experience with that, having 
> worked as a A and P in the airlines for a number of years.  There is a

> soapy solution
> used for some engines to clean the compressor blades, I am not sure
what
> the 
> heck they made it out of. Another thing was we used to clean APU
> (auxiliary 
> power units)compressor sections with walnut shell bits, (ground up nut
> shells) by 
> just sprinkling them into the intake of the engine when it was
running.
> 
> Carbon GONE.   Don't get me wrong, though, I am not necessarily
> reccomending this
> for decarboning a vw diesel.  PS, the trike flying is going
exceedingly
> well, 
> and I am having alot of fun.  Doug Ferguson  ps, feeling better
Hagar??
> Glad 
> you're still putting in your 2 cents worth.
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