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Econo Miser!!

 
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herbgh(at)nctc.com
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PostPosted: Thu Sep 04, 2008 5:53 am    Post subject: Econo Miser!! Reply with quote
Jerb

Easy to make your own....A quick look at the exploded drawing on
the UL news site tells the story... I would install stops such that
the needle could only travel the distance from the lower to the top
clip position... maybe a bit more? Otherwise a geared turns counter
on the inst panel would be wise...

Jacks design may be more eloquent... ? Gonna post it to your site
Jack? Herb
At 11:32 PM 9/3/2008, you wrote:
Quote:


Is this a system that sold back in 95 or so by a guy if I recall
right was based in Alaska. Seems like I also recall he was killed
in a plane crash. I may be totally wrong. We bought one of those
kits, my partner installed it but I had him pull it back off until
our engine was out of warranty. We never reinstalled it. This one
came with all the parts. Didn't have to send him anything but
money. If I recall right it allowed you to tweak the mixture while
in flight. It been a while and cells are dying at a faster pace each day.
jerb
At 08:32 PM 9/1/2008, you wrote:
>
>
>At 04:18 PM 9/1/08 -0500, you wrote:
> >
> >


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Dana



Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA
PostPosted: Thu Sep 04, 2008 6:02 am    Post subject: Econo Miser!! Reply with quote
I seem to recall a commercial mixture adjust retrofit that involved moving
the main jet up and down, rather than moving the needle itself... but I
could be mistaken.

Mixture control using manifold vacuum is not new. The Bing altitude
compensating carbs do something like that, and it was an option in the
Stromberg carburetor on the A-65 in my 1941 Taylorcraft (mine just had the
cover plate where it would be mounted).

-Dana
--
If we wish to "restore" respect for the law, a good start would be to
pass only laws that people will respect.

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jbhart(at)onlyinternet.ne
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PostPosted: Thu Sep 04, 2008 7:18 am    Post subject: Econo Miser!! Reply with quote
At 08:52 AM 9/4/08 -0500, you wrote:
Quote:


Jerb

Easy to make your own....A quick look at the exploded drawing on
the UL news site tells the story... I would install stops such that
the needle could only travel the distance from the lower to the top
clip position... maybe a bit more? Otherwise a geared turns counter
on the inst panel would be wise...

Jacks design may be more eloquent... ? Gonna post it to your site
Jack? Herb


Herb,

I will post it when I am sure it is going to do the job. My goal is to
raise the EGT from one slot rich. I flew yesterday with 3/4th of a slot
rich which is 1/4 a slot richer than my coldest winter setting for the
Victor 1+. The best vacuum I could pull was 4.2 inches of water, and so I
could not raise the EGT to the upper limit on some of the lower cruise
engine speeds.

I just finished making an adapter so I can replace the altitude compensation
plug in the Bing with a hose barb. This source should produce lower
pressures than the inlet probe. If the weather clears up, I will try it out
today. If this works, it will make it easier to convert to the system as one
will not have to remove the carburetor to install the current probe. Right
now I am using a junk gage and flow throttling valve. I am so encouraged
that I ordered a new flow throttling valve, a vacuum gage and thin wall
light tubing. At this point it looks very promising. Valve adjustment is not
sensitive, and the pressure and EGT reading are holding steady. I thought
of discarding the gage, but a gage costs less than a multiple turn readout
scale locking dial for the valve and doesn't weigh much more.

Fly Safe!

Jack B. Hart FF004
Winchester, IN

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