REFLECTOR: Dynon fuel pressure
Laurence Coen
lwcoen at hotmail.com
Wed Apr 4 10:48:25 CDT 2012
John,
I have a VDO fuel pressure gage that acts the same way. I'm on my second
sender and opened the old one to see what was inside. It's a pressure
operated rheostat and apparently the wiper arm starts making poor contact
with the wire wound resistance over time causing a false high reading. It's
a piece of junk in my opinion.
Larry Coen
N136LC
--------------------------------------------------
From: "John Dibble" <aminetech at bluefrog.com>
Sent: Tuesday, April 03, 2012 9:36 AM
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Dynon fuel pressure
> I'm planning to relocate my oil VDO sensor to the engine where it's
> supposed to be and was also concerned about vibration. What are you using
> for your connection?
>
> My 2 terminal VDO fuel pressure sensor also exhibits strange readings.
> When I start the engine it always reads correct at 7 psig (carburetor).
> Then after 30 minutes or so, it often runs 11-15 and sometimes up to 25
> psig. The readings are not very stable, so I don't believe them. I think
> the wires may be bad.
>
> John
>
> On 4/2/2012 9:52 PM, Brian Michalk wrote:
>> Yes, VDO makes I thought all of their sensors in ungrounded and grounded
>> versions. I have a few of them on the plane for oil pressure and fuel
>> pressure, which for me is 45PSI.
>>
>> None of mine are hard mounted to the engine. I've heard that the
>> vibration can cause them to fail at the neck. The orifice is a few
>> thousandths in diameter, really small, so if it does break off it won't
>> flow very much.
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
More information about the Reflector
mailing list