Not to mention that the B707-120B with the JT3D, initial JT9D-3A powered
B747-200s, and the venerable B-52 with J57 power used water (later,
water/alcohol) injection on takeoff. This was done both to reduce peak
takeoff power turbine inlet temperatures and to increase mass flow,
hence thrust.
- Bob Mann, '69 2000 Solex, no water injection
Steve Harvey wrote:
>
> Mark,
> It just wasn't used during WWII. The C-130, P-3, E-2B and other turbo-prop
> aircraft still use a water solution for high performance takeoffs.
> Steve Harvey
> Milwaukee
>
> Mark Gill wrote:
>
> > Hello List,
> >
> > Introduction of water vapor into a petrochemical internal combustion engine
> > does improve performance (improved burning of fuel). If my memory serves me
> > right, this was used during World War II in airplanes to enhance their
> > performance. There are two schools of thought as to why:
> > 1. The evaporating water/alcohol cools the intake air and makes the air
> > more condensed (more molecules of oxygen)as it is sucked into the combustion
> > chamber. (Note the alcohol prevents water from freezing due to the venturi
> > effect or sometimes referred to as vapor lock).
> > 2. The water (H2O) introduced into the chemical mixture of fuel (Hydro
> > Carbons) and air (Oxygen) performs a more efficient chemical reaction
> > (burning) solution.
> >
> > I was not a good student (chemical or otherwise) so I don't know which is
> > right if any. In the early 1970's as gas went from $0.25 to $0.50 per
> > gallon, I helped a friend of mine install a water injector for a carburated
> > gas engine. There was improved performance, but fuel mileage improvement
> > was nominal since the big 455 Cubic Inch V-8, four barrel carburator was
> > only getting 11-12 miles per gallon either way.
> >
> > Regards,
> >
> > Mark Gill
> >
> > >From: Alex Avery <aavery@rica.net>
> > >Reply-To: Alex Avery <aavery@rica.net>
> > >To: "Terry and Donna Cost" <tcost@vvm.com>, "Datsun Roadsters"
> > ><datsun-roadsters@autox.team.net>
> > >Subject: Re: cooler cars
> > >Date: Wed, 24 Oct 2001 10:52:42 -0400
> > >
> > >How does the small amount of humidified air that is introduced into the
> > >intake air stream remove carbon? If the air is at ambient air temp, how
> > >much water vapor can it pick up in the short amount of time it passes
> > >throught the alcohol/water mixture and to the intake manifold?
> > >
> > >If you live in a desert, where the air is naturally dry, is carbon build-up
> > >more of a problem? Conversely, if water vapor/humidity helps prevent/remove
> > >carbon buildup, are the engines on Florida cars naturally low on carbon
> > >buildup?
> > >
> > >Curious Alex
> > >
> > >At 09:03 AM 10/24/01 -0500, Terry and Donna Cost wrote:
> > > >I posted this to another list and thought the roadsters might also like
> > >to
> > > >see it. They were talking about carbon buildup, running hot, pinging,
> > >low
> > > >octane gas, etc.
> > > >
> > > >A long time ago J. C. Whitney sold a water vapor injector kit that they
> > > >advertised to remove carbon, increase horsepower, run cooler, cure you of
> > > >warts, etc. The "kit" was a quart bottle with two holes in the lid. One
> > > >hole had a length of fish tank bubble tubing connected to a bubble stone
> > >on
> > > >the bottom of the bottle, the other hole connected to a bubble valve on
> > >the
> > > >lid, then bubble tubing from the valve to a vacuum port on the carb or
> > > >manifold. They sold a magic mixture to put into the bottle, which was 1/5
> > > >alcohol and 4/5 tap water. The alcohol helped the bubble action. You
> > > >started the engine with the valve closed, then adjusted it to just barely
> > > >bubbling at idle, which was full vacuum. Air went through the lid into
> > >the
> > > >bottom of the bottle, became water vapor, left the jar at the top by the
> > > >hole in the lid, went into the valve, through the tubing to the carb or
> > > >manifold, then did it's magic in the combustion chambers. They sealed
> > >the
> > > >holes to the tubing with clear sealant. You refilled the bottle by
> > > >unscrewing the lid and pouring in 3/4 quart of mystery mixture. The kit
> > > >also had a hanger to secure the bottle to a firewall or fender. I
> > >refilled
> > > >my bottle about twice a month. On an older carbureted car it works very
> > > >well, keeping the engine cooler and burning off the carbon. I made a few
> > > >from plastic juice bottles and fish store hardware, and bought rubbing
> > > >alcohol for the magic mixture.
> > > >
> > > >Only 17 days until the TDROC Fall Rallye in Kerrville. Let me or Mike
> > >know
> > > >if you are coming so we can plan for numbers. Day trippers on Saturday
> > >the
> > > >10th are welcome. Drive a Datsun or whatever will get you there. See
> > >you
> > > >in Kerrville!!
> > > >
> > > >Leisure Suit Terry
> > > >
> > > >///
> > > >/// datsun-roadsters@autox.team.net mailing list
> > > >/// Send admin requests to majordomo@autox.team.net or go to
> > > >/// http://www.team.net/cgi-bin/majorcool
> > > >/// Send list postings to datsun-roadsters@autox.team.net
> > > >///
> > >
> > >///
> > >/// datsun-roadsters@autox.team.net mailing list
> > >/// Send admin requests to majordomo@autox.team.net or go to
> > >/// http://www.team.net/cgi-bin/majorcool
> > >/// Send list postings to datsun-roadsters@autox.team.net
> > >///
> > >
> >
> > _________________________________________________________________
> >
> > ///
> > /// datsun-roadsters@autox.team.net mailing list
> > /// Send admin requests to majordomo@autox.team.net or go to
> > /// http://www.team.net/cgi-bin/majorcool
> > /// Send list postings to datsun-roadsters@autox.team.net
> > ///
>
> ///
> /// datsun-roadsters@autox.team.net mailing list
> /// Send admin requests to majordomo@autox.team.net or go to
> /// http://www.team.net/cgi-bin/majorcool
> /// Send list postings to datsun-roadsters@autox.team.net
> ///
--
R.W. Mann & Company, Inc. >> Airline Industry Analysis
Port Washington, NY 11050 >> tel 516-944-0900, fax -7280
mailto:info@RWMann.com >> URL http://www.RWMann.com/
///
/// datsun-roadsters@autox.team.net mailing list
///
|