Fuel Flow instrument

[Billc851]

has anyone considered trying a marine fuel flow instrument in home built.
http://www.navman.com/marine/products/fuel/fuel2100/index.html

I was considering the EI-fp-5 but at $750 it a bit pricy for my budget.. The
marine unit does the same thing for $150

Any thoughts?
Bill

[MikeR]

"Billc851" > wrote in message
...
> has anyone considered trying a marine fuel flow instrument in home built.
> http://www.navman.com/marine/products/fuel/fuel2100/index.html
>
> I was considering the EI-fp-5 but at $750 it a bit pricy for my budget..
The
> marine unit does the same thing for $150
>
> Any thoughts?
> Bill


I'm currently using that unit on my 19 foot Glasply. It functions well for
me. It has barbed fittings and I would have preferred flared.

MikeR

[Montblack]

("Billc851" wrote)
<snip>
> has anyone considered trying a marine fuel flow instrument in home built.
> http://www.navman.com/marine/products/fuel/fuel2100/index.html


32F/0C for the low end operating temp?

Maybe it isn't intended for the icebreaker segment of the marine market.


Montblack

[John Kunkel]

"Billc851" > wrote in message
...
> has anyone considered trying a marine fuel flow instrument in home built.
> http://www.navman.com/marine/products/fuel/fuel2100/index.html
>
> I was considering the EI-fp-5 but at $750 it a bit pricy for my budget..
> The marine unit does the same thing for $150

I'd check put the design of the transmitter, aircraft certified FF
transmitters will allow full fuel flow even if the transmitter malfunctions;
some commercial units reportedly will restrict fuel flow if the internal
wheel seizes up.

[Michael]

John Kunkel wrote:
> I'd check put the design of the transmitter, aircraft certified FF
> transmitters will allow full fuel flow even if the transmitter
malfunctions;
> some commercial units reportedly will restrict fuel flow if the
internal
> wheel seizes up.

Such things have been reported - but not by reliable witnesses.

Seriously, a turbine is not a positive-displacement meter. Even if the
bearings freeze, liquid can still get past it.

The main difference between electronics designed for airplanes and
boats is cost, not quality.

Michael

[MikeR]

"John Kunkel" > wrote in message
...
>
> "Billc851" > wrote in message
> ...
> > has anyone considered trying a marine fuel flow instrument in home
built.
> > http://www.navman.com/marine/products/fuel/fuel2100/index.html
> >
> > I was considering the EI-fp-5 but at $750 it a bit pricy for my budget..
> > The marine unit does the same thing for $150
>
> I'd check put the design of the transmitter, aircraft certified FF
> transmitters will allow full fuel flow even if the transmitter
malfunctions;
> some commercial units reportedly will restrict fuel flow if the internal
> wheel seizes up.

No wheel in this one (electrical impulses).

[Blueskies]

"MikeR" > wrote in message ...
>
>
> No wheel in this one (electrical impulses).
>
>

Impulses from what?

[Greg Piney]

Bill,

You may want to take a look at the Aveo MaxiSingles model FF-3. It is
$172 plus $125 for the sender. I have 2 of their instruments and like
them alot.

http://www.aveousa.com/avionics/instruments/aveoMaxiSingles/index.htm

Greg Piney

Billc851 wrote:
> has anyone considered trying a marine fuel flow instrument in home built.
> http://www.navman.com/marine/products/fuel/fuel2100/index.html
>
> I was considering the EI-fp-5 but at $750 it a bit pricy for my budget.. The
> marine unit does the same thing for $150
>
> Any thoughts?
> Bill
>
>

[MikeR]

"Blueskies" > wrote in message
. com...
>
> "MikeR" > wrote in message
...
> >
> >
> > No wheel in this one (electrical impulses).
> >
> >
>
> Impulses from what?


Ref: http://203.167.230.122/qiss/scripts/FAQFrame.htm


Title: How does the flow transducer work?
Question/Symptom:
How does the flow transducer work?

--------------------------------------------------------------------------

Answer/Solution:
NAVMAN flow transducers are of an optical type. Within the transducer
are a transmitter and receiver that output an infrared beam through the body
of the transducer. Inside the transducer is a very precisely dimensioned
turbine running on jewelled bearings. As the fuel flows it spins the turbine
and the blades cut the infrared beam, which transmits a pulsed signal to the
fuel computer.

[Blueskies]

"MikeR" > wrote in message ...
>
> "Blueskies" > wrote in message
> . com...
>>
>> "MikeR" > wrote in message
> ...
>> >
>> >
>> > No wheel in this one (electrical impulses).
>> >
>> >
>>
>> Impulses from what?
>
>
> Ref: http://203.167.230.122/qiss/scripts/FAQFrame.htm
>
>
> Title: How does the flow transducer work?
> Question/Symptom:
> How does the flow transducer work?
>
> --------------------------------------------------------------------------
>
> Answer/Solution:
> NAVMAN flow transducers are of an optical type. Within the transducer
> are a transmitter and receiver that output an infrared beam through the body
> of the transducer. Inside the transducer is a very precisely dimensioned
> turbine running on jewelled bearings. As the fuel flows it spins the turbine
> and the blades cut the infrared beam, which transmits a pulsed signal to the
> fuel computer.
>
>

OK, normal stuff. Thanks for the link. The concern from the other folks is what happens to pressure drop if the (turbine
in this case) wheel seizes up. Usually it will add some pressure drop with a corresponding restriction to the flow, but
the turbine types pass fluid pretty well even if seized...

[MikeR]

"Blueskies" > wrote in message
om...
>
> "MikeR" > wrote in message
...
> >
> > "Blueskies" > wrote in message
> > . com...
> >>
> >> "MikeR" > wrote in message
> > ...
> >> >
> >> >
> >> > No wheel in this one (electrical impulses).
> >> >
> >> >
> >>
> >> Impulses from what?
> >
> >
> > Ref: http://203.167.230.122/qiss/scripts/FAQFrame.htm
> >
> >
> > Title: How does the flow transducer work?
> > Question/Symptom:
> > How does the flow transducer work?
> >
>
> --------------------------------------------------------------------------
> >
> > Answer/Solution:
> > NAVMAN flow transducers are of an optical type. Within the
transducer
> > are a transmitter and receiver that output an infrared beam through the
body
> > of the transducer. Inside the transducer is a very precisely dimensioned
> > turbine running on jewelled bearings. As the fuel flows it spins the
turbine
> > and the blades cut the infrared beam, which transmits a pulsed signal to
the
> > fuel computer.
> >
> >
>
> OK, normal stuff. Thanks for the link. The concern from the other folks is
what happens to pressure drop if the (turbine
> in this case) wheel seizes up. Usually it will add some pressure drop with
a corresponding restriction to the flow, but
> the turbine types pass fluid pretty well even if seized...


They try to address that issue here:
http://203.167.230.122/qiss/scripts/FAQFrame.htm

Title: Will the fuel transducer restrict fuel flow?
Question/Symptom:
Will the fuel flow transducer obstruct the fuel supply to my engine?




--------------------------------------------------------------------------

Answer/Solution:
The current one-piece flow transducer is rated at a maximum flow rate
of 130 litres per hour (32 US gallons per hour). In modern terms this is a
relatively large amount of fuel especially with the advent of far more
economical engines. In cases where users suspect the flow transducer of
being the cause of a fuel supply problem then it is generally found that the
design of the fuel delivery system is marginal to start with, in other words
adding the flow transducer may be the straw that breaks the camels back but
it is not the cause of the problem. The critical measurement in any outboard
engine fuel system is the total backpressure at full throttle. This is
measured in 'Inches of Mercury'. The absolute maximum acceptable limit
amongst most manufacturers is 7.0 inches of mercury and ideally should be
far less (Always consult your outboard manufacturer for detailed
recommendations). Our fuel transducer creates a maximum backpressure of 1.0
inch of mercury backpressure so even if your manufacturer specified a
maximum of 4.0 inches backpressure then you have plenty of margin for the
fuel delivery system components








>
>

[[email protected]]

On Tue, 15 Mar 2005 19:48:14 -0500, "Billc851" >
wrote:

>has anyone considered trying a marine fuel flow instrument in home built.
>http://www.navman.com/marine/products/fuel/fuel2100/index.html
>
>I was considering the EI-fp-5 but at $750 it a bit pricy for my budget.. The
>marine unit does the same thing for $150
>
>Any thoughts?
>Bill
>
Sounds like a good idea - Now, anyone have any information on a Faure
Herman Flowmeter? I have the indicator head (basically a 1MA meter,
calibrated 1-7 (pphX100)

What does IT run off of???

[IAN DONALDSON]

G'day Bill

I have a Navman in my Murphy Rebel with a 100hp Rotax and it works just
fine. Its accurate to less than 3% and is easy to use.
Navman make a modified unit for aviation and definitely recommend that the
marine version not be used in an aircraft.

Regards

Ian Donaldson




"Greg Piney" > wrote in message
...
> Bill,
>
> You may want to take a look at the Aveo MaxiSingles model FF-3. It is $172
> plus $125 for the sender. I have 2 of their instruments and like them
> alot.
>
> http://www.aveousa.com/avionics/instruments/aveoMaxiSingles/index.htm
>
> Greg Piney
>
> Billc851 wrote:
>> has anyone considered trying a marine fuel flow instrument in home built.
>> http://www.navman.com/marine/products/fuel/fuel2100/index.html
>>
>> I was considering the EI-fp-5 but at $750 it a bit pricy for my budget..
>> The marine unit does the same thing for $150
>>
>> Any thoughts?
>> Bill

[George A. Graham]

On Tue, 15 Mar 2005, Billc851 wrote:

> has anyone considered trying a marine fuel flow instrument in home built.

I have been flying for almost two years with the Navman unit.
It works OK as an indicator of fuel flow. I don't like the two
button control for setting fuel remaining, and other features.

The instructions say to include a fuel filter upstream of the
sender, so that junk will not clog it.

George Graham
RX-7 Powered Graham-EZ, N4449E
Homepage <http://bfn.org/~ca266>

[Dale Larsen]

Optical/electrical impulses from a TURBINE WHEEL.

"MikeR" > wrote in message
...
>
> "John Kunkel" > wrote in message
> ...
> >
> > "Billc851" > wrote in message
> > ...
> > > has anyone considered trying a marine fuel flow instrument in home
> built.
> > > http://www.navman.com/marine/products/fuel/fuel2100/index.html
> > >
> > > I was considering the EI-fp-5 but at $750 it a bit pricy for my
budget..
> > > The marine unit does the same thing for $150
> >
> > I'd check put the design of the transmitter, aircraft certified FF
> > transmitters will allow full fuel flow even if the transmitter
> malfunctions;
> > some commercial units reportedly will restrict fuel flow if the internal
> > wheel seizes up.
>
> No wheel in this one (electrical impulses).
>
>

[Blueskies]

"MikeR" > wrote in message ...
>
> Our fuel transducer creates a maximum backpressure of 1.0
> inch of mercury backpressure so even if your manufacturer specified a
> maximum of 4.0 inches backpressure then you have plenty of margin for the
> fuel delivery system components
>


That is low, and a 32 GPM rated? No issues that I can see...

Thanks Mike!

[IAN DONALDSON]

G'day

I have had the Navman (Mizer) in use for more than two years, and unlike
Graham found it quite easy to use.

I really like the instant fuel flow reading and the trip usage meter. The
fuel gauges in my plane are grossly inaccurate, but the Mizer makes fuel
management a breeze.

I fitted mine upstream of the gascolator. Doing it this way there is no need
to add a separate filter in the system.


Regards

Ian Donaldson


> I have been flying for almost two years with the Navman unit.
> It works OK as an indicator of fuel flow. I don't like the two
> button control for setting fuel remaining, and other features.
>
> The instructions say to include a fuel filter upstream of the
> sender, so that junk will not clog it.
>
> George Graham
> RX-7 Powered Graham-EZ, N4449E
> Homepage <http://bfn.org/~ca266>
>

[George A. Graham]

On Fri, 18 Mar 2005, IAN DONALDSON wrote:

> I have had the Navman (Mizer) in use for more than two years, and unlike
> Graham found it quite easy to use.
>
That is good to know Ian, I've suspected that my unit might be defective.
The buttons just do not work well.

BTW, I see that <www.BoatersWorld.com> is selling them for $129.99
including shipping.


George Graham
RX-7 Powered Graham-EZ, N4449E
Homepage <http://bfn.org/~ca266>

[IAN DONALDSON]

G'day George



I just reread my post and see that I referred to you as "Graham".
Sorry about that. I guess that I got confused! No offence was meant.


Regards

Ian Donaldson.



"George A. Graham" > wrote in message
...
> On Fri, 18 Mar 2005, IAN DONALDSON wrote:
>
>> I have had the Navman (Mizer) in use for more than two years, and unlike
>> Graham found it quite easy to use.
>>
> That is good to know Ian, I've suspected that my unit might be defective.
> The buttons just do not work well.
>
> BTW, I see that <www.BoatersWorld.com> is selling them for $129.99
> including shipping.
>
>
> George Graham
> RX-7 Powered Graham-EZ, N4449E
> Homepage <http://bfn.org/~ca266>
>