Today's Message Index:
----------------------
1. 06:32 AM - vacuum instrument supply (Gary Casey)
2. 06:32 AM - (Gary Casey)
3. 06:53 AM - Re: vacuum instrument supply (John Slade)
4. 02:10 PM - Re: strange pins (Jerzy Krasinski)
5. 07:04 PM - Re: vacuum instrument supply (Robert L. Nuckolls, III)
6. 07:40 PM - Re: Re: vacuum instrument supply (George Braly)
Message 1
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| Subject: | vacuum instrument supply |
--> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net>
> > What is the failure rate of the electric motor versus
> >the suction pump?
>
> I don't have hard numbers from any formal studies. Further,
> there is more to consider than pump of failures.
This may not be the forum, but somebody started it by mentioning "vacuum,"
so...
I designed a (patented) pressure regulator that will provide a continuous
power source for vacuum instruments from a turbocharged engine regardless of
engine operating condition. It eliminates the need for a mechanical vacuum
pump and should last forever as there are no wearing parts. I'm looking for
someone to test the first unit as my turbocharged ES is quite a ways from
being completed. Anyone interested?
Gary Casey
Message 2
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--> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net>
<<When the points are closed, it should complete a
circuit, making the bulb light, and when they open, the light should
go out. Is that right?
Thanks for ideas.>>
Okay, you asked for ideas - here's a couple for what they're worth: First,
a test light hooked to the P-lead won't work, as the resistance to ground is
almost the same with the points open as with them closed. You can use an
ohm-meter to measure the slight change. Turn the prop VERY SLOWLY as the
voltage induced by the mag could wipe out your meter if you turn it at any
speed at all. Second idea: Add an unshielded extension to the P-lead and
hook your inductive light to that. It will trigger twice per rev, but
that's okay as you'll still get the image at the position you're looking
for. Then take the extension out when you're done. Using a light with the
engine running is much more hazardous, so I would tape the light to the top
of the engine with the trigger taped down and then read the light from the
driver's seat.
Gary Casey
Message 3
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| Subject: | vacuum instrument supply |
--> AeroElectric-List message posted by: "John Slade" <sladerj@bellsouth.net>
> I designed a (patented) pressure regulator that will provide a continuous
> power source for vacuum instruments from a turbocharged engine .....
Sounds very interesting, Gary. I'll be testing my 13B turbo soon. Email me
off line at sladerj@bellsouth.net
Regards,
John Slade
Message 4
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| Subject: | Re: strange pins |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasins@ceat.okstate.edu>
Charlie,
I did not think about it, but it makes sense.A simple experiment will
confirm. But my other radio does not seem to have that feature.
Thank you very much for the info.
Jerzy
Charlie and Tupper England wrote:
>--> AeroElectric-List message posted by: Charlie and Tupper England <cengland@netdoor.com>
>
>
>
>
>>>--> AeroElectric-List message posted by: Jerzy Krasinski
>>><krasins@ceat.okstate.edu>
>>>
>>>Bob,
>>>
>>>I got Michel MX385 radio, which is a direct replacement for Cessna ARC
>>>RT385A. I have pinouts of the connectors. I found that in addition to
>>>the standard inputs and outputs, there are three extra pins there that
>>>I have not seen before.
>>>These are:
>>>pin 1 Phn sidetone in
>>>pin 14 Phn sidetone out
>>>pin 19 Sidetone out
>>>
>>>I called TKN/Michel and talked to an engineer there, but probably I got
>>>a wrong engineer, he had no idea what these pins were for.
>>>By any chance do you know what these are? I could probably leave these
>>>pins alone, but I am driven by curiosity.
>>>
>>>Thank you,
>>>
>>>Jerzy
>>>
>>>
>>>
>>>
>Sidetone is the sound of your own voice in the headphones when you talk during
>transmit. This is an optional feature on most radios. In my limited experience
>with a/c radios, two pins are usually tied together to activate the feature.
>
>This is purely a guess, but I would bet that pin 14 is headphone level audio out
>& should be tied to pin 1 so that you hear your voice in the headphones when you
> transmit.
>
>Perhaps pin 19 is speaker level sidetone audio. (hard to imagine a use for it,
>though)
>
>Charlie
>
>
>
>
Message 5
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| Subject: | Re: vacuum instrument supply |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 06:27 AM 12/18/2002 -0800, you wrote:
>--> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net>
>
> > > What is the failure rate of the electric motor versus
> > >the suction pump?
> >
> > I don't have hard numbers from any formal studies. Further,
> > there is more to consider than pump of failures.
>
>This may not be the forum, but somebody started it by mentioning "vacuum,"
>so...
>I designed a (patented) pressure regulator that will provide a continuous
>power source for vacuum instruments from a turbocharged engine regardless of
>engine operating condition. It eliminates the need for a mechanical vacuum
>pump and should last forever as there are no wearing parts. I'm looking for
>someone to test the first unit as my turbocharged ES is quite a ways from
>being completed. Anyone interested?
Gary,
Can you send me literature on the product?
Bob . . .
Message 6
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| Subject: | Re: vacuum instrument supply |
--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
What happens when the engine quits in the clouds? Or an induction coupling
comes undone while IFR?
-----Original Message-----
From: Robert L. Nuckolls, III [mailto:bob.nuckolls@cox.net]
Subject: AeroElectric-List: Re: vacuum instrument supply
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
At 06:27 AM 12/18/2002 -0800, you wrote:
>--> AeroElectric-List message posted by: "Gary Casey"
<glcasey@adelphia.net>
>
> > > What is the failure rate of the electric motor versus
> > >the suction pump?
> >
> > I don't have hard numbers from any formal studies. Further,
> > there is more to consider than pump of failures.
>
>This may not be the forum, but somebody started it by mentioning "vacuum,"
>so...
>I designed a (patented) pressure regulator that will provide a continuous
>power source for vacuum instruments from a turbocharged engine regardless
of
>engine operating condition. It eliminates the need for a mechanical vacuum
>pump and should last forever as there are no wearing parts. I'm looking
for
>someone to test the first unit as my turbocharged ES is quite a ways from
>being completed. Anyone interested?
Gary,
Can you send me literature on the product?
Bob . . .
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