hi guys
last week during a competition for Italian-cup F4J/sport (without static point) I fly my old Byron F16 with JetCat P60, during the 2nd flight the engine stop and I made aN emergency landing, when I look for the reasons of stop the ECU shown me as last off condition "RC OFF"
whats mean???????? I've a fail safe condition into my JR radio with shut-off (3 position switch off and trottle trimm off) but I remember that some years ago with my P120 I have took a fail safe during my fligth and the ECU V2.0 give me a message of "MANUAL OFF".

THANKS FOR HELP

Hello,

That message indicates that the turbine was shut down via RC command, just like the throttle pulse (combination of the throttle stick and the throttle trim) was pulled to the "off" position. This could also be cause by the Aux channel going to the "off" state.

Another way this can happen is by having a failsafe with the failsafe being incorrectly programmed int he ECU. Make sure that you are getting a valid failsafe indication on the GSU when you turn off your transmitter during ground test.

Hope that helps,

thanks matt, if I understand...............I've took a failsafe during a flight[:@][:@][:@][:@] beacause I had programmed into my radio a failsafe with trottle stick at idle, trim at off and aux channell at off.
If it possible programmed failsafe via ECU????????? and how I can make this???????

Hello again,

Yes it is possible to program another layer of failsafe into the ECU that will prevent a turbine shutdown on a quick "glitch" (of course the turbine will still shutdown after a programmed delay, for safety.

I will post the instructions in awhile. It is all in the manual, BTW.

Regards,

thanks Matt I'm waiting about you

P.S. when I've bought my little P60 I dont received the proper instructions manual[:@][:@][:@][:@][:@][:@][:@] its old manual[:@][:@][:@][:@]

Here are links to the manuals:

http://www.jetcatusa.com/PDFFiles/In...l%20V6.0J2.pdf

http://www.jetcatusa.com/PDFFiles/Je...kReference.pdf

Ciao Giombo !!

Veri interesting the Quick reference guides !! THANKS Thud_Driver !!

Hello again,

I tried to post it, but there are graphics in the manual. The instructions are on page 25 and 26 of the manual.

BTW the "requirement" mentioned is for AMA compliance only, although the concept is excellent, developed initially by JetCat.

Setup failsafe mode and “Learn RC�.

The updated ECU has the unique ability to shut-off your engine if you have a radio failure. This is accomplished by detecting that the signal from the receiver’s throttle output is either missing or outside the values that were learned during setup. YOU ARE REQUIRED TO USE THE FAILSAFE! This will not instantly shut off the engine.

A timer is started when the failsafe condition occurs and the engine will immediately go to idle. After 3 seconds (2 seconds after V5.0A for AMA requirements as of March 1, 2004) the engine will then shut off. This 2 second timer is reset back to zero anytime a non-failsafe condition is met.

Your R/C signal must be broken for at least 2 continuous seconds before the engine is shut off. The following is for PCM receivers only. Users of FM (PPM) receivers bypass the failsafe instructions and go to the �Learn R/C� section in the manual. (FM Receivers are not allowed under AMA rules.)

Setting the failsafe for JR PCM receivers

The following procedures are for most radios like JR and Futaba. Call JetCat USA for failsafe setup procedures for Futaba 8U radios or other radio brands. If you look at the following servo travel graph, you can see how the ECU detects a failsafe condition. The dark gray bar is the transmitters throttle channel for low throttle, low throttle trim and full throttle set to 100% travel. This is the value that is set into the transmitter’s failsafe. The light gray bar is a reduced low throttle, low throttle trim travel and full throttle set to 75%. This is the value that will be taught into the ECU. If the throttle input to the ECU is between 75% for low throttle, low throttle trim and 75% for full throttle, then this would be within the normal range taught into the ECU and will operate normally. If a failsafe condition exists, the transmitter’s pre-programmed 100% low throttle, low throttle trim will be outputted by the receiver and this value would be outside of the ECU’s taught in range. The ECU will now automatically set the engine to idle (after the FailSafe delay) and start a programmable timer. The timer is set to 2 seconds by default. If the timer times out, the ECU will shut-off the engine. If at anytime during this countdown the receivers signal is reacquired, the ECU timer will be reset and the engine will go back to the speed the throttle stick is currently at. Low High throttle throttle Failsafe 100% low / 100% high throttle travel.ECU 75% low / 75% high throttle travel.

To accomplish this, you must execute the following steps. It is VITAL that these steps be preformed in this order for the failsafe feature to operate properly! Review your transmitter’s manual on how to set the failsafe. Examples are given for the JR 10X with S style receivers. YOU MUST PERFORM THESE STEPS! IMPORTANT: IF YOU CHANGE YOUR TRANSMITTERS FAILSAFE AGAIN IN THE FUTURE, YOU MUST REDUE THE FOLLOWING INSTRUCTIONS AGAIN. FOR TWO CHANNEL OPERATION: DO NOT SET THE AUX CHANNEL IN YOUR TRANSMITTER FOR FAILSAFE. KEEP IT IN HOLD MODE ONLY. THE AUX CHANNEL IS ALWAYS DESIGNED TO STOP THE ENGINE INSTANTLY IF COMMANDED TO DO SO. • First, set your transmitters travel parameter to 100% for low throttle and 100% for high throttle. On the JR 10X transmitter, use function 12 to access the throttle travel. • Set your transmitters failsafe for low throttle, low throttle trim. On the JR 10X transmitter use function 77 to access the failsafe. Enable the throttle channel for a failsafe (select 1 so the bar is in the top position ▀) and then set the throttle stick and throttle trim to their minimum positions. Save this minimum position by pressing STORE. • Return to the travel menu and now set the minimum and maximum throttle travel to 75%. • Now you must teach in these values into the ECU. Refer to �Learn R/C� section in this manual for this procedure. You can verify the failsafe function in the default GSU screen. Default Display This symbol will appear when in failsafe. If you turn-off your transmitter, the default display will indicate a failsafe by displaying an . If you turn the transmitter back on, the will disappear. If the does not appear when you turn-off your transmitter, the fail-safe is not programmed properly! 21 0.0 6.9 OC: You can verify the failsafe parameters by accessing the RC Check Menu. Press and hold the Select Menu key on the GSU and by pressing the ► + key until the RC-Check Menu is displayed.

Hi Mr.Matt thanks a lot for your instructions, thats all I need
another things........... If I use a single channel for run the engine.........the aux cable need to fit into receiver or I can leave its disconnected and blocked????[][]

Hello,

The short answer is "yes", if you run single channel, then you can leave the "Aux" line to the ECU disconnected.

The longer answer is, I would hook up the "Aux" line AFTER you have performed the "Learn RC" step. You will STILL be in single channel mode, but the ECU will now have 2 sources of power (from both the "Throttle" and the "Aux" line) even though the ECU is only taking commands from the "Throttle" line signal.

Hope this helps,

Hi Matt........I would thanks you for your support,
can I ask you another question about this engine?????????
When I start up the engine and wait for calibration.........I even spool up max RPM but if I spool down too fast the engine blow down under 50000RPM.
to overcome this problem I raise the minimum RPM at 51000/52000 and the engine dont blow down.

whats mean????????

Hello,

What do you mean by "blow down"? If you mean that the RPM undershoots to 50,000, then that is fine.

Regards,

Hi MrMatt, please forgive me for my bad languagge, I try to explain you again

I star up my P60 as usually....... I wait ok from ecu and spool up the max rpm for setting parameters........... at this moment if I move the trottle stick to idle so fast the engine decrease rpm and sometimes have a shut off for too low rpm, instead if I move the trottle slowly the engine dont shut off, to remedy I have increased the idle at 51000/52000 rpm and the engine run perfectly.

I hope you can understam me