Twins flameout detection
03-29-2019, 04:42 AM
#1
Thread Starter
Twins flameout detection
Hey guys, I remember reading a lot of smart ideas and comments regarding this issue, but I obviously can't find anything anymore.
Can you kindly give me some input on how to set a warning on a futaba 18 when an engine flames out? What's the best approach? Current/voltage on pump, valves, rpm, temperature, etc etc
And how to get a warning that doesn't drive me nuts while I m trying to land?
Thanks all!
Can you kindly give me some input on how to set a warning on a futaba 18 when an engine flames out? What's the best approach? Current/voltage on pump, valves, rpm, temperature, etc etc
And how to get a warning that doesn't drive me nuts while I m trying to land?
Thanks all!
03-29-2019, 05:33 AM
#3
Thread Starter
with this? https://www.xicoy.com/catalog/produc...roducts_id=362
is there an equivalent for the new kintech ecu?
is there an equivalent for the new kintech ecu?
03-29-2019, 05:52 AM
#4
You can use standalone Jeti ProfiBox with two of the MUI 30 sensors between ESC and pump.
Easy instillation, you do not have to touch your existing system and you can have independent sensors for both turbines. The additional sensors like MFlow (Fuel), MBar Air pressure is just the cherry.
Another advantage, your friend can monitor data and you can keep flying.
Zb
Jeti Telemetry JetiBox Profi Monitor/Programmer
Easy instillation, you do not have to touch your existing system and you can have independent sensors for both turbines. The additional sensors like MFlow (Fuel), MBar Air pressure is just the cherry.
Another advantage, your friend can monitor data and you can keep flying.
Zb
Jeti Telemetry JetiBox Profi Monitor/Programmer
03-29-2019, 05:38 PM
#6
Cant say with Futaba, but with the Jeti I setup a telemetry control that activates after turbine is started (Temp>200C). This actives an alarm that triggers when pump cutoff (think is something like V <0.1). Bu uing pump voltage the alarm triggers immediately without waiting for the RPM to drop off
03-29-2019, 11:18 PM
#7
Cant say with Futaba, but with the Jeti I setup a telemetry control that activates after turbine is started (Temp>200C). This actives an alarm that triggers when pump cutoff (think is something like V <0.1). Bu uing pump voltage the alarm triggers immediately without waiting for the RPM to drop off
1) Altitude is more than 2m
2) RPM is less than 20,000rpm
3) EGT is between 100C and 300C
The possibilities with Jeti are almost endless...
The pump voltage also looks a nice idea, however seen sometimes turbines flaming out and the pump keeps on pumping and a trail of fuel can be seen from the back.....
Thanks, Tassos
03-30-2019, 11:31 AM
#8
My Feedback: (2)
I think the OP is asking specifically about the Futaba 18, so while the above is helpful, I don’t think anyone has answered his question. Jeti does seem far more flexible, but the OP is using Futaba.
I’m not at home now to try it, but I think this may work.
Ive a 18mz and feel your pain. If you use a trigger of less than 10000 rpm as suggested, in the event of a flameout, the alarm will go off, but won’t ever stop, as the OP recognises.
You could use a rpm range from 10000 to say 30000 rpm, so during a rundown you’ll get the warning. It won’t help you though if the engine seizes, OR there’s a ECU or the rpm unit fails.
i guess you could use a EGT range, say from a temp below idle, to approximately 100 degrees less. If the engine ran down or seized (assuming it’s not on fire, which hopefully you’d see anyway) then you would have the warning, while the engine cooled down.
I’m not at home now to try it, but I think this may work.
Ive a 18mz and feel your pain. If you use a trigger of less than 10000 rpm as suggested, in the event of a flameout, the alarm will go off, but won’t ever stop, as the OP recognises.
You could use a rpm range from 10000 to say 30000 rpm, so during a rundown you’ll get the warning. It won’t help you though if the engine seizes, OR there’s a ECU or the rpm unit fails.
i guess you could use a EGT range, say from a temp below idle, to approximately 100 degrees less. If the engine ran down or seized (assuming it’s not on fire, which hopefully you’d see anyway) then you would have the warning, while the engine cooled down.
04-01-2019, 03:16 AM
#9
Thread Starter
I think the OP is asking specifically about the Futaba 18, so while the above is helpful, I don’t think anyone has answered his question. Jeti does seem far more flexible, but the OP is using Futaba.
I’m not at home now to try it, but I think this may work.
Ive a 18mz and feel your pain. If you use a trigger of less than 10000 rpm as suggested, in the event of a flameout, the alarm will go off, but won’t ever stop, as the OP recognises.
You could use a rpm range from 10000 to say 30000 rpm, so during a rundown you’ll get the warning. It won’t help you though if the engine seizes, OR there’s a ECU or the rpm unit fails.
i guess you could use a EGT range, say from a temp below idle, to approximately 100 degrees less. If the engine ran down or seized (assuming it’s not on fire, which hopefully you’d see anyway) then you would have the warning, while the engine cooled down.
I’m not at home now to try it, but I think this may work.
Ive a 18mz and feel your pain. If you use a trigger of less than 10000 rpm as suggested, in the event of a flameout, the alarm will go off, but won’t ever stop, as the OP recognises.
You could use a rpm range from 10000 to say 30000 rpm, so during a rundown you’ll get the warning. It won’t help you though if the engine seizes, OR there’s a ECU or the rpm unit fails.
i guess you could use a EGT range, say from a temp below idle, to approximately 100 degrees less. If the engine ran down or seized (assuming it’s not on fire, which hopefully you’d see anyway) then you would have the warning, while the engine cooled down.
04-02-2019, 02:21 AM
#11
Thread Starter
04-02-2019, 06:27 AM
#12
My Feedback: (1)
Join Date: Sep 2003
Location: Talamanca de JaramaMadrid, SPAIN
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"mauryr" I think easier way to stablish engines flame out alarms in Futaba 18MZ is controling the voltage to the pumps using a combination of external voltage imput cable (CA-RVIN-700) and a voltage sensor(SBS-01V) or even 2 voltage sensors if you prefer using the external voltage cable for any other battery.
Remember that if you go the 2x SBS-01V sensors you should have to register both on the transmitter so as to get data from each one on the corresponding screens.
Then you only have to establish two -one for each turbine- very low voltage alarms, for example below 0,1V (I do not remember if you may fix 0,0V as an alarm value), and a switch for activating/desactivating the alarm which depending on your turbine might be the same for starting/stoping the turbines.
This way if you ear the engine flame out alarm during flight you may switch off it and, at the same time, enter engine quit/cooling mode. Of course you may be very, very carefull selecting alarms tones and/or vibes so as not to quit the live engine!.
Best Regards.
Remember that if you go the 2x SBS-01V sensors you should have to register both on the transmitter so as to get data from each one on the corresponding screens.
Then you only have to establish two -one for each turbine- very low voltage alarms, for example below 0,1V (I do not remember if you may fix 0,0V as an alarm value), and a switch for activating/desactivating the alarm which depending on your turbine might be the same for starting/stoping the turbines.
This way if you ear the engine flame out alarm during flight you may switch off it and, at the same time, enter engine quit/cooling mode. Of course you may be very, very carefull selecting alarms tones and/or vibes so as not to quit the live engine!.
Best Regards.
