CorvAircraft> Detonation/ Water Injection

[Dave Morris "BigD"]

You could just eliminate your gascolator and preflight draining of 
the sump, and run with water all the time!

(snicker)

Dave

At 09:30 PM 8/21/2006, you wrote:
>I too have been strongly considering installing a water injection
>(steam-type) system in my future Corvair airplane engine to decrease the
>chances of detonation and possibly gain a little fuel economy to boot.  The
>main advantage of steam injection verses water injection systems is that
>steam supposedly mixes with the fuel/air charge more readily than straight
>water injection.  Apparently the heat from the steam makes for a more dense
>fuel/air mixture.  The simple home-made steam injection system I am
>considering using produces steam by injecting water (via engine vacuum) into
>small diameter copper tubing that is wrapped a number of times around the
>exhaust pipe.  The super-heated steam is then injected into the pvc manifold
>connection (on a car).  I'll probably either use the stock vacuum
>connections on the Corvair carb necks, or somehow combine it with the
>air/oil separator system.  Of course before flight testing will come
>extensive ground-based vehicle testing.  If anyone is interested, the
>following link is one of the websites I got my steam injection idea from:
>http://www.better-mileage.com/water4.html
>
>Cheers,
>
>Doug
>
>Doug Naylor
>Arkansas
>Wittman Buttercup
>dugnaylor at hotmail.com
>
>
>From: "Desert Eagle" <jimi at hdc-nm.com>
>
>In my personal records I have noted as much as a 6 MPG improvement on
>mileage using WI. And a friend of mine has recorded a constant change from
>6.5 GPH to a new range of 5.9 GPH on an O-290 in a homebuilt.
>Just something to consider.
>Jimi
>
>
>Concerning the current thread. I have used water injection in various forms
>for the last 36+ years. I have had only good results from it, clean pistons
>on a "top overhaul", excellent mileage and a marginal increase in
>performance. What lead me to it was the success that they Brits had with it
>on their aircraft during WWII. I am living proof that it is an acceptable
>modification for any internal combustion engine at almost any altitude and
>condition. Would be glad to share simple systems with folks who would like
>to try it themselves, both "bubbler and pressure injection" systems.
>
>For what it is worth, my 2 cents worth.
>Jimi
>
>------------------------------
>
>From: "Clare Snyder" <claresnyder at rogers.com>
>
>This was STANDARD PROCEDURE in turbo Olds jetfires, and was used as an addon
>on Turbo 'Vairs, as well as being used on a LOT of other engines(including
>the spitfire? in WW2)
>
>
> >>While I believe my engine will be perfect. I am putting in a water
> >>injection
> >>unit. this will be a windshield washer motor spritzing
> >>5-10% water spray. If I have bad fuel or heat on climb. I start spritzing.
> >>I do
> >>not think it will add horsepower just cooling, so it
> >>will be used only as needed.
> >>Joe G.
>
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