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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › JR 9303 Failsafe Option
04-04-2005 03:02 AM  13 years agoPost 1
mcoccia

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Central Jersey

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Is it possible to turn the failsafe off on the 9303? I was trying to figure it out and could not figure it out unless I can assign the FS to another channel not being used.

Thanks
Mark

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04-04-2005 03:57 AM  13 years agoPost 2
JKos

rrProfessor

Redondo Beach, CA

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Mark,
I'm not quite sure I understand what you mean by turning the fail safe off. On a PCM tx/rx combo, you cannot simply turn off the fail safe of the receiver. You have two options for each channel and those are to either hold the last known position or to move to a preset position.

- John

RR rules!

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04-04-2005 12:56 PM  13 years agoPost 3
mcoccia

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Central Jersey

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JKos

Hi, On my Futaba I can turn off the FS. What do people do when they fly a heli? What is the proper way then to set the failsafe for a heli? I noticed when the radio goes off the throttle goes to full throttle, I don't think I want that.


Thanks
Mark

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04-04-2005 01:37 PM  13 years agoPost 4
playfair

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Rochester, NY

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Set the throttle to idle, pitch to center (zero), and I leave the other channels at their "last known position". That way, it will hopefully come down easy and predictable, no matter what orientation.

One booboo I made when setting failsafe on my 8103-
I thought you "saved" the settings for each channel seperately, so I would set throttle for idle, then end up centering the stick for mid-pitch and saving that setting. Days later when I decided to turn off the tranny to check I noticed the throttle would go way up. Went back and forth a few times, but couldn't get all the servos set right. It ends up you save all the channels at once, not individually. Set it Throt Hold at mid stick, and now all is fine. Sure glad I didn't get a lock out during the confusion!


The sky is our canvas

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04-04-2005 01:45 PM  13 years agoPost 5
mcoccia

rrKey Veteran

Central Jersey

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playfair,

Thank you. I will take a look I am just surprised we can't turn this function off.


Thanks again
Mark

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04-04-2005 04:27 PM  13 years agoPost 6
JKos

rrProfessor

Redondo Beach, CA

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Mark,
Maybe I should ask, what is your definition of "off"? If you set the throttle F/S properly, it will go to idle or kill, your choice.

Thanks,
John

RR rules!

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04-04-2005 06:26 PM  13 years agoPost 7
mcoccia

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Central Jersey

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JKos,

Hi, I am new to this heli stuff. What I mean is to disable the function entirely (No Failsafe option at all). I will set up to goto idle that sounds good to me.

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04-04-2005 06:31 PM  13 years agoPost 8
JKos

rrProfessor

Redondo Beach, CA

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Mark,
You definitely want fail safe on a heli. Maybe I'm being thick here, but I'm still not sure what you mean by "off". Would you prefer the servos to jitter and/or go to random positions as with an FM rx?

- John

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04-04-2005 07:46 PM  13 years agoPost 9
Tim B

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Pasco, Washington

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Sounds to me like what he might be saying is that he doesn't care what happens as long as he doesn't have to deal with it at all. Shut off the failsafe, not have to program it, and just accept whatever risks?

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04-04-2005 09:44 PM  13 years agoPost 10
mcoccia

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Central Jersey

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Folks,

Yes I am going to set the failsafe but my question is "Is there a option to turn the failsafe completely off as my Futaba 9CHP has this feature.

Also keep in mind Failsafe's are not 100% and do not function as they are supposed to all the time I have seen this many times. The best failsafe is a throttle return spring now I have not seen this on a Heli but the concept is the same.

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04-04-2005 10:18 PM  13 years agoPost 11
JKos

rrProfessor

Redondo Beach, CA

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Mark,
If you were using a PCM rx with your 9CHP, you could not turn "off" the failsafe. The two options you had on the 9CHP w/PCM rx are exactly the same as on the 9303 w/PCM rx. Those two options are "hold the current position" or "move to a predetermined location."

> throttle return spring

Gasser helis have throttle return springs by nature of a spring on the carb. If you use a servo which moves freely w/o power and keep the linkage nice and free, the throttle will actually close itself if the servo loses power.

- John

RR rules!

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04-04-2005 11:00 PM  13 years agoPost 12
mcoccia

rrKey Veteran

Central Jersey

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John,

I was able or at-least I thought the failsafe was off with the Futaba. there is a option where it is not enabled. I was using the PCM RX. I am using digital servo's with my Raptor.

So the proper way to set this would be:

IDLE
0 degree pitch

Am I correct here.

I noticed you are a Rep for Century. I was looking at those Gasser's. Is there any other info on them other then the website? I like the idea of Gas (Cost) . I am assuming they have more torque then the 2-Stroke's correct? I have more questions regarding the gasser I should probably post them in the Century forum.

Thanks again
Mark

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04-05-2005 10:57 PM  13 years agoPost 13
JKos

rrProfessor

Redondo Beach, CA

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> I was able or at-least I thought the failsafe was off with the Futaba

If you thought it was "off", then it was set to hold. You can certainly do the same with the 9303. But, I would suggest settng the throttle to go to idle.

I'll PM you about the PG.

- John

RR rules!

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04-05-2005 11:06 PM  13 years agoPost 14
Tim B

rrApprentice

Pasco, Washington

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Heres a thought.
What if the failsafe feature were able to activate a co-pilot and set the pitch and throttle to hover? The heli would right itself and hold a hover until control is regained or you shoot it down.
Ok, set it to slowly desend then just wait for it to run out of fuel.

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04-05-2005 11:06 PM  13 years agoPost 15
mcoccia

rrKey Veteran

Central Jersey

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John,

Not sure about the Futaba. I did figure out the 9303 failsafe and have it set to idle and the rest is in the holding position.


Thanks
Mark

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