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All Forums >> RC Airplanes >> RC Jets >> Spektrum DSM-2 AR9000 Fail-safe setup > JetCat
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Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/4/2008 3:40 AM   
Silver182



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Status: offline 		When using the JR Spektrum DSM-2 AR9000 plug-in modules for the JR 10X.... Fail-safe is set at bind, (i.e. controls where you want them & bind).

My first question is.. do we set the turbine shutdown per the JetCat manual, i.e. 100% travel, low trim, low throttle & bind... then change to 75% & learn R/C? Does this setup procedure set the turbine to shutdown after ECU time delay AMA proper?

My second question is how is the JetCat turbine fail-safe setup when using the Futaba Fasst R/F link?
Lee


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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/4/2008 4:59 AM   
John Redman


 

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Status: offline 		Hey Lee,

Set up the travel on the throttle channel at 100% when you bind and have the trim down as well as the throttle.

Once you bind, then set the travel volume to 50% high and low.

Learn your RC and you are done. The only change is the travel setting to 50%.

Can't speak for the FASST system, have never messed with it.

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/4/2008 11:47 AM   
Vincent



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Status: offline 		John,
I its 75% with a spektrum module and AR900 rx. I believe the 50% setting is for JR 2.4 systems (non module conversions), check with Wilcox to be sure.
V..

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/4/2008 1:10 PM   
rhklenke



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quote:

ORIGINAL: Silver182

My second question is how is the JetCat turbine fail-safe setup when using the Futaba Fasst R/F link?
Lee



Lee,

Depends on which FASST RX you are using. If you're using the 7 or 8 channel units that set failsafe in the RX at bind, Then set the throttle channel endpoints to 120%, set the throttle and trim to minimum, and bind the RX. Then go back and set the throttle channel travel to 80% and "learn RC" on the ECU.

If you're using the 14-channel RX where the failsafe is set in the TX, then set the throttle channel endpoints to 120%, set the failsafe on the TX to low throttle and trim, and then set the throttle channel endpoints to 80% and "learn RC" again.

In either case, what you want is for the throttle channel pulse width, when the system goes into failsafe, to go below what the ECU has learned as minimum throttle stick and minimum throttle trim. This is what triggers the ECU to know that the RC system has gone into failsafe and it needs to start the failsafe shut down timer. What I'm not 100% sure of is how far below the normal low throttle/low trim point the pulse width needs to go so that the ECU can detect it. I've learned that on most Futaba systems, setting the failsafe at 120% endpoint and then setting the normal endpoint to 80% does the trick...

Bob

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/4/2008 5:15 PM   
ianober



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quote:

ORIGINAL: John Redman

Hey Lee,

Set up the travel on the throttle channel at 100% when you bind and have the trim down as well as the throttle.

Once you bind, then set the travel volume to 50% high and low.

Learn your RC and you are done. The only change is the travel setting to 50%.

Can't speak for the FASST system, have never messed with it.



John, is this the same procedure for the 12X as well?

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 1:50 AM   
WHMC


 

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Status: offline 		Getting confused! I thought the process was 100% + - throttle travel to teach ECU. Fail safe set with TX values, stick idle/trim down during binding process. After teach process change Tx to 75% + - throttle travel .Rebind system. Should not be different for Dx7, 9303 2.4, 12x 2.4.. JR/Wilcox, whats the 50% thing and is this normal. WHMC STL

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 2:18 AM   
Vincent



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You bind the radio at 100%throttle with all your controls set. The last thing you do is reset the throttle to 75% and then learn the ecu...done. The way you did it will work too. I was told by Bob the values for the JR 2.4 are 50% due to some issues with the 75% setting which is ok with the spektrum module conversions.
V..

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 3:10 AM   
John Redman


 

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Status: offline 		Guys, whenever using 2.4 from Spektrum or JR set your travel values to 50% high and low, not 75% like we did on 72 mhz. Does not matter what transmitter you are using. Wher as we have had some work at 75%, we have had some that did not. The 50% values are the cure.

We sent Wilcox a few radios for testing as well as modules to verify this. These numbers are from the master!

Yes, the value is 50% on the 12X as well.

I cannot speak for the Futaba FASST systems as I have not worked with them at all. Bob has and I believe he has the answer.

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 4:47 AM   
Silver182



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Status: offline 		Thanks everyone... I'm one of those R/C radio junkies...I've got several versions of JR / Spektrum DSM-2 & Futaba Fasst 2.4GHz systems. They all seem to provide R/F links that are far superior to anything we've seen before. Each brand has good, better & almost perfect features. Neither brand, in my opinion has it all, but both provide a solid usable system.

JetCat just published an updated turbine manual... covering the latest 6.xx ECU's. I didn't find any additions directly addressing proper 2.4GHz fail-safe setup...so I presumed the 100% > 75% works with the bind set fail-safe radios, and also the software set fail-safes available in the high end Futaba's.

The great thing about this forum is input from everyone...given time any question can find an answer.
Lee


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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 5:31 AM   
Thud_Driver



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Status: offline 		I don't know what the issues are but I use a 9303 & AR9000 and do this:

Set low throttle to 150% and bind
Reset throttle travel to +/- 100%
Set throttle trim travel to 40%
Learn R/C

Probably 600 flights on 4 or 5 airplanes/engines this way without problems - P-70/P-80/Titan

The pulse width at the ECU runs ~1125us at off to ~1925us at full throttle.

John R. - why the recommendation for a narrower range?? I've never had a problem.

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 1:29 PM   
John Redman


 

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Status: offline 		Hey Rick,

It seems that on occassion the 75% programming doesn't always fall in the window of the 2.4 stuff. Not sure why. I don't even pretent to understand that stuff like you guys, you know that. But Bob Wilcox and I talked about this a couple of years ago and he felt the 50% thing was the easiest for people to understand and give consistent results. So I did what he said and am just passing it on.

Maybe you could give BW a call and see, I am sure he would enlighten you. So how many bazillion hours do you have on your motors now? I still think we need to mold you in wax and put you in the model aviation hall of fame museum. Anyone that can get 1500 + flights ona Top Cat is and over 150 hours on a P-80 is a hero in my books!!

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 5:06 PM   
Ragz



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quote:

ORIGINAL: rhklenke


quote:

ORIGINAL: Silver182

My second question is how is the JetCat turbine fail-safe setup when using the Futaba Fasst R/F link?
Lee



Lee,

Depends on which FASST RX you are using. If you're using the 7 or 8 channel units that set failsafe in the RX at bind, Then set the throttle channel endpoints to 120%, set the throttle and trim to minimum, and bind the RX. Then go back and set the throttle channel travel to 80% and "learn RC" on the ECU.

If you're using the 14-channel RX where the failsafe is set in the TX, then set the throttle channel endpoints to 120%, set the failsafe on the TX to low throttle and trim, and then set the throttle channel endpoints to 80% and "learn RC" again.

In either case, what you want is for the throttle channel pulse width, when the system goes into failsafe, to go below what the ECU has learned as minimum throttle stick and minimum throttle trim. This is what triggers the ECU to know that the RC system has gone into failsafe and it needs to start the failsafe shut down timer. What I'm not 100% sure of is how far below the normal low throttle/low trim point the pulse width needs to go so that the ECU can detect it. I've learned that on most Futaba systems, setting the failsafe at 120% endpoint and then setting the normal endpoint to 80% does the trick...

Bob


Bob,

I am going to test fly a futaba fasst 9 channel system with a p120 ecu version 5.x today. I will use this method....can you totally confirm these are the setup values for failsafe?

thanks

Anurag


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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 7:32 PM   
Thud_Driver



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ORIGINAL: John Redman
So how many bazillion hours do you have on your motors now?


John,

Thanks. I'll probably see Bob W. at Fresno.

As for hours, the one P-70 is just 2 hours short of 200 hours and my original P-80 is at 203 hrs. Both engines will be retired shortly as I have just bought a pair of engines to replace them. I would guess that at year's end I'll be just short of 600 hours across all the engines (all JetCat).

Best I can tell, I'm around 800 turbine flights on the Spectrum stuff using the settings above. That's on 2 different module based XP9303's and about 5 different Rx's.

Rick

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RE: Spektrum DSM-2 AR9000 Fail-safe setup > JetCat - 9/5/2008 9:39 PM   
John Redman


 

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Status: offline 		Way to go Rick. Your flying is off the hook.

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