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From: "sboese" <sboese@uwyo.edu>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Fuel pressure sensor placement
Date: Wed, 7 Jan 2009 12:53:45 -0700
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If the pinhole is in parallel with the fuel pressure regulator, then it
would not affect the placement of the fuel pressure sensor.  Eggenfeller
recommends (requires?) such a parallel restriction on their =
installations.
The idea, as I understand it, is to allow at least some flow at very low
pressures which enables purging the system if the fuel pump has vapor or =
air
in it.  This is intended to reduce the likelihood of vapor lock.  I =
don't
know if this is the arrangement in the Mistral system, though.

Steve Boese


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of John Slade
Sent: Wednesday, January 07, 2009 12:33 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel pressure sensor placement


 > At the end of the rail, it has a very small pin hole.
Right. I think the sensor has to be before that pinhole.
John
(PS - that Mistral pinhole idea has always struck me as strange - isn't=20
that what the fuel regulator is for, or does it replace it?)

Christopher Barber wrote:
> The return does have a restrictor on it, IIRC.  At the end of the=20
> rail, it has a very small pin hole. I think I have a good location.=20
> Things are coming together.
>
> I am moving from "proof of concept" to actual flight ready=20
> "stuff"...or so I hope <g>
>
> Thanks guys.
>
> I am mo
>
>
> ----- Original Message ----- From: "John Slade" =
<sladerj@sbcglobal.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Wednesday, January 07, 2009 10:51 AM
> Subject: [FlyRotary] Re: Fuel pressure sensor placement
>
>
>> Chris,
>> Doesn't that mistral intake manifold have some sort of restrictor on=20
>> the fuel output from the rail?
>> If so, you need the sensor on the rail side of this.
>> John
>>
>> Christopher Barber wrote:
>>> I am getting the bugs worked out of my systems and trying to add one =

>>> thing at a time as not to screw up what is working.  I have a fuel=20
>>> pressure regulator with a gauge on it in the engine compartment.   =20
>>> I am at a point where I want to add  my fuel pressure sensor so I=20
>>> can read the pressure on the EM2, however, I am unsure as to where=20
>>> the sensor should be placed in the fuel lines.  I do have a very=20
>>> convenient place I could put it between the regulator and the=20
>>> Mistral fuel rail.  It seems that would give me an accurate reading, =

>>> but I am unsure of what all to consider.  So, what should I be=20
>>> considering?
>>>  Thanks.
>>>  All the best,
>>>  Chris
>>
>>
>> --=20
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:=20
>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>
>
>
>
> --=20
> Homepage:  http://www.flyrotary.com/
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