Hi Guys!

Telemetry level of fuel in flight:






look at: http://www.luetzenburger-online.de

Best Regards from Vienna

Spunki

Interesting. Does it measure fuel flow?

Also, that's a very neat header tank. How does it work? Does it have a filter like the UAT, or does it simply contain a pickup tube?

Antony

Thanks Antony!

Yes, the Flowmeter and the AirUnit measure the mass flow of fuel and transmit the data current to the GroundUnit ...



About the header tank look at: http://www.rc-network.de/forum/showt...=37649&page=31




Regards Spunki

Does the disk prevent air from being ingested by the pickup when inverted?

Hello Mark!

>>Does the disk prevent air from being ingested by the pickup when inverted?<<

Yes, exactly, preventively!

Here another low-cost and self-build hopper-tank-system



Spunki

Interesting. Where did you get it? Is it accurate?

Thank You Kenny!

The "Fuelwatch" was developed and built by Markus and me. After the final tests the Fuelwatch will be available as kit.



Regards Spunki

Thanks for the reply.

Sent you a PM.

Spunki.

It's good to see that you are still flying your Reaper! I still Like mine as well.

About how much do you think that the fuel watch will cost?

Thank You geneh-RCU

The Fuelwatch will cost approximately euro 270,--. As kit. The most expensive are thereby the two really very good radio modules in the free 433MHz-frequency. Approx. euro 2x90,--




Spunki

hello @all,

i see there is a very high intrest about the fuelwatch. Hmm.... i think i have to design a new part in the GroundUnit- software. Which units should i set for the "US-Market"? We use only "ml" (Milliliter) here in Europe.

Best regards
Markus

Markus,

Most here in the USA would probably like to see it measure in the standard of ounces (oz). Seems this is how the majority rate their fuel consumption. Should be easy enough to convert the mL to ounces though if you round the numbers off "29.57 mL or (30 mL) = 1 oz.

Or this would be nice
E...l...F

@causeitflies-RCU

... much better, see this







@Countryboy
Thanks for reply. The only thing i have to do is to change "ml" in "oz". The software does not use the metric unit "ml". The input is only the number of volume. The fuelwatch counts the pulses from the flowmeter. Arghhh.. i designed the software and forgot how it works.. grngnrrrnf

This unit is great.. and what if you guys add a alarm to fuel level, batt level, turbine flameout, stall speed and too much g´s?


Best regards, Enrique

all together? ... in this case a lovely and euphonious female voice tells you: "EJECT EJECT EJECT!!!!!!!"

But when you "only" have a low fuel level and/or a low batt level a peeper will tell you - hey its time to land.

Ok, the Fuelwatch tells you also when the transmit signal is lost or when the GroundUnit can´t analyse data (based on radio interference)

LOL.. Ok, but what if you just add to it a small voltage detector on the pump just to warn the pilot a turbine stop as early as possible? that would make the unit 100% compatible with any turbine around, and it would be not much more complicated to add ( i guess).. anyway, I liked very much
this gadget.

this would be great set up for any fuels,gas,glow,how much does the unit weight? and when might it be up for tests in the states?

Hi 3dd!

Please look into the user manual. At the end under "technical data" (Technische Daten) ...



download: http://www.composit-modellbau.de/fil..._Rev%201.2.pdf


Spunki

thanks erbroens,

the fuelwatch system is a "stand alone" solution. The system is self-contained. The only thing to do is to put the Flowmeter between the turbine and the pump (preasure side) . Connect the AirUnit to a free port of the reciever or Y-cable (voltage detector R/C Unit and power suply for the AirUnit). But the idea with the second voltage detector for the pump is a great idea! Hmm... i think i will add this function. This will be the fith warning "Turbine stopped" or so.

Hello Markus

If the turbine turns off by a flameout you can hear it also without alarm

Wow, what a waste of money!! More electronics, weight, more failure, for what?? How many dead stick caused by emty tank did you guys see in the last years???

Hello Glorfindel

To much!

Exactly the same arguments came at the beginning of this thread, look at: http://www.rc-network.de/forum/showthread.php?t=37649

Meantime however exactly the same people want now also a "Fuelwatch"

Regards Spunki

Spunki: you are right if you are flying alone, but in a crowded r/c club this is often not possible... when a flameout happens in this situation the pilot notices it when the airplane slows down, and at this time it is much harder to do the runway. With this device warning the pilot a few seconds earlier , could make the difference between crashing the plane or not.

Glorfindel: this is also a relative question... a plane with this device can carry no extra fuel for safety margin reasons on timed flights, so a plane with it would be lighter, (or fly longer, if
you prefer).

About extra failures, they are no critical. they didn´t interfere with the plane control, so no harm could be done. About adding more electronics to the plane, that´s no problem too.. you should wait to see what a r/c plane will look in 20 years from now!

And finally about the amount of dead sticks seem per year depend how many flights are done..
there is a strong possibility of this happening in the figure of hundreds of flights.

Enrique

From this point of view you are right Enrique!

Spunki