[NSRCA-discussion] Bad fuel

Mon Jan 15 03:59:28 AKST 2007

Hi Fred,

Thanks for doing the experiment I will be very interested to hear the
verdict.

Regards,

Peter

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Fred Huber
Sent: Monday, 15 January 2007 18:43 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Bad fuel

OK... running the experiment

8 oz fuel (supposed to be 30% heli fuel.. but sat for a long time)

4 oz water added.

1/2 tablespoon crystals. (overkill for the 4 oz water)

Should know what it looks like in a couple of hours.  It takes this stuff a
while to do all the absorbing its going to do.

----- Original Message ----- 

From: Fred Huber <mailto:fhhuber at clearwire.net>  

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Monday, January 15, 2007 2:26 AM

Subject: Re: [NSRCA-discussion] Bad fuel

The freezing trick works to get water out of some oils... but not out of
alcohols.

Distillation or a molecular seive will get the water out. 

It would be a multi-stage distilation..

Evaportaion would leave the oil behind.

I'm not sure which evaporates first.. Methyl alcohol or Nitromethane

Distillation is a big mess to set up to end up with the water out and get
back all the fuel.. not cost effective to salvage 4 gallons.

The molecular seive can be done 2 ways...

http://www.ecn.nl/docs/library/report/2006/rx06023.pdf

Or there's a "gel-crystal" which will absorb water but the alcohol molecule
is too big.  I am unsure if the water retention crystals you can get a the
local garden supply (even at some grocery stores) is the correct stuff to
separae water from alcohol (and oil.. but if it doesn't take in the alcolhol
it probably won't tke in the oil).  Its not very expensive ($14 gets enough
crystals to absorb about 25 gallons of water) so its a viable thing to try.
(If it doesn't work you can use the crystals in potted plants and your
garden)

I have some of the garden version gel-crystals... I guess I could dump water
into 8 oz of some very old fuel I have and see what happens when I put the
crystals in...

I HAVE read reports of some version of gel-crystal stuff working.  The
question is where to get the correct stuff. (If this isn't the right stuff)
If it works, the stuff is reusable... just strain out the gel blobs
(sintered brass clunk/pickup wouldn't let the stuff through) then dry them
in the sun.  

The garden stuff: 2 tablespoons of crystals makes over 1 quart of gel when
its absorbed water.

----- Original Message ----- 

From: Lance Van <mailto:patterndude at tx.rr.com>  Nostrand 

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Monday, January 15, 2007 12:23 AM

Subject: Re: [NSRCA-discussion] Bad fuel

Does this really work?  The water that is in solution will separate and
freeze?  

--Lance

----- Original Message ----- 

From: Koenig, <mailto:Tom.Koenig at actewagl.com.au>  Tom 

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Sunday, January 14, 2007 4:23 PM

Subject: Re: [NSRCA-discussion] Bad fuel

Peter,

Stick it in the freezer. The water will freeze, just skim it off. 

Tom

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Peter Pennisi
Sent: Monday, 15 January 2007 9:11 AM
To: 'NSRCA Mailing List'
Subject: [NSRCA-discussion] Bad fuel

I have 4 gallons of 30% nitro fuel which was mixed with bad Methanol
(unknown at the time) the rest of the ingredients were fine.

I am assuming that moisture may have got the drum of methanol but I am not
sure.

Is there anything I can do to recover this fuel for at least sport plane use
or do I count my losses and throw it out?  

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