Ive been looking at some EIS systems myself, and looking for guages to go along
as backups.
Can someone recommend good low-priced guages? $35 a pop sounds pretty good, but
i havent found anything like that...
thx,
-guil
Quoting Europa Aircraft <europa@gate.net>:
>
> Hi All,
>
> I have been getting a lot of calls at the US office lately requesting
> guidance for installing engine instruments.
>
> There are some neat new products available, like the EIS mentioned below.
> The EIS is a great way to monitor a large number of engine parameters
> previously impossible to do with analog gages.
>
> The EIS, however, it not as easy to read as an analog instrument. Our
> engines are not cheap, and our butts are worth even more, so I strongly
> recommend that for the most important engine parameters, easy to read analog
> gages be installed in an area easy for the pilot to spot. Examples are the
> Tachometer, hottest CHT, Oil Pressure, and Manifold Pressure for constant
> speed props. It is much easier to spot a fluxing, or dropping oil pressure
> needle than to spot, or page to the number on an EIS. Once the red light
> comes on there will not be as much time left to find a place to land.
>
> For a 914 you also need to have something that tells you the difference
> between fuel pressure & boost pressure in the same units - ex, both in inches
> of mercury, or pounds per square inch. I am working with an instrument
> manufacturer to make a single gage that does this to save space, but don't
> have one yet. Rotax recommends a twin MP gage for this, but they only come
> in 3 1/4.
>
> Another reason for installing engine instruments is noted below. If the
> monitor fails, then there is no way to tell what the engine is doing.
>
> Finally, these instruments are cheap, as little as $35 each.
>
> Hope this answers some of your questions.
>
> John Hurst
> Europa Aircraft
> Lakeland, FL
>
> -----Original Message-----
> From: Carl & Dot <carl_p@ntlworld.com>
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Faulty Oil Temp sensor
>
>
> It turns out there is nothing wrong with the sensor although initial checks
> with the ohm meter suggested this was the problem.
>
> It seems to be much worse. and the problem is somewhere in the Grand Rapids
> EIS unit. Not only is the oil temp wrong but most other readings are now
> abnormal.
>
> Guess well have to return it to Grand Rapids and see what they have to say.
>
> Pity as the annual permit is due to expire in 10 days.
>
> Carl pattinson
> G-LABS (grounded for the time being)
>
>
> ----- Original Message -----
> From: <n3eu@comcast.net>
> To: <europa-list@matronics.com>
> Subject: Re: Europa-List: Faulty Oil Temp sensor
>
>
> >
> > Carl & Dot wrote:
> > > ...
> > > I think my preferred choice would be to mount the sender in the return
> line
> > > from the bottom of the crank casing (would need a metal block to screw
> into)
> > > where I assume it would be at its hottest. An easier fix might be to
> bolt it
> > > into the oil tank somewhere. This would be simpler, and there would be
> less
> > > vibration. Possibly a hole tapped into the centre of the oil tank drain
> plug
> > > would work.
> >
> > I believe Rotax is sensing cooled oil -- not the hot stuff in the return
> line nor similar in the tank, and they set the redline temp premised upon
> the effect of mounting in the engine block where they do. I would caution
> against any mod which cannot verify the Rotax redline temp is still valid,
> or proper testing to set a new value. So far we have one reported instance
> of a complete failure only alleged due to vibration. A google search I did
> turns up nothing else, nor is there a service bulletin. If vibration can
> fail the sensor, then the temp instrument will go blooey, so then just
> replace it. A significant cause of homebuilt accidents is this type of
> experimentation, resulting in doing things in ways not seen on production
> aircraft for presumably valid reason.
> >
> > Regards,
> > Fred F.
> >
> >
>
>
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