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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › FAIL SAFE ON 617FS
04-26-2009 04:54 PM  9 years agoPost 1
duke666

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Hampshire, UK

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Hi Guys,

I currently use several 617FS receivers with my old faithful 9C using the 2.4 TM7 module. Although I have never had a problem with this set up I am looking to change for a purpose made 2.4TX.

My question is, if I still use my 617FS receivers will I get failsafe working on several channels as it used to before I fitted the 2.4 conversion? With the conversion you can only have FS on throttle.

Duke

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04-26-2009 04:56 PM  9 years agoPost 2
Auto180_OCMA

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Futaba City Z (Mobara)

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You can assign the Fail safes channels
Duke666,

You can assign the Failsafes.

AMA 334000

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04-26-2009 04:58 PM  9 years agoPost 3
modtron

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Oxford. UK

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You will only get failsafe on the throttle channel with the 4, 6 & 7ch receivers.

Only with the 8 & 14ch receivers, do you get full channel failsafe settings.

modtron
Oxford UK

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04-27-2009 01:06 PM  9 years agoPost 4
PJRono

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Minnesota, Ya!

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+1 what modtron said.

If you skip me I can't play!

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04-27-2009 03:56 PM  9 years agoPost 5
duke666

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Hampshire, UK

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Perhaps I'll wait a bit longer if I have to replace my RX's too. Then hopefully Futaba will bring out an RX suitable for 8V to keep up with Spektrum.

Duke

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04-27-2009 06:35 PM  9 years agoPost 6
Auto180_OCMA

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Futaba City Z (Mobara)

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Duke666 do you really like the 8 volt
I ve never used more than 5.9 to the servos, i only use futaba servos.
Just a question do you really like the 8 volt?

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04-27-2009 06:43 PM  9 years agoPost 7
duke666

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Hampshire, UK

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To be totally honest, I've never used 8V to my 8717's although I hear they are good for it, I wouldn't. But if in the future I was purchasing an RX and or servos and had the choice of 8V capable version I would as this would do away with reg and therefore one less poptential failure.

Duke

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05-03-2009 12:43 PM  9 years agoPost 8
duke666

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Hampshire, UK

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If I get a new 10CG or may be the 12FG, will my 617FS receivers work with these radios ok for now?

Duke

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05-03-2009 01:28 PM  9 years agoPost 9
Peefor

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Norfolk UK

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These may be useful

http://www.futaba-rc.com/radios/feature-compare.html

The chart at the bottom of this page shows what will work with what.

http://2.4gigahertz.com/receivers/index.html

Pete

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05-03-2009 02:03 PM  9 years agoPost 10
PJRono

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Minnesota, Ya!

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Yes, they will but only in 7 channel mode and you will only have failsafe on throttle only.

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05-03-2009 04:45 PM  9 years agoPost 11
duke666

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Hampshire, UK

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Thank you.

Duke

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05-03-2009 11:56 PM  9 years agoPost 12
Thomas L Erb

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Alliance ohio

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Duke you will still have Failsafe in all channels but throttle is the only one adjustable. all other will go into hold.

Tom

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05-04-2009 03:08 PM  9 years agoPost 13
PJRono

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I don't know about you but I don't consider "Hold" as a failsafe. So you're decending inverted and the Rx locks out. The heli then drives itself into the ground is "Hold" doing you any good? Or the heli is in FFF towards the pits and locks out, "Hold" then continues to fly it into the crowd. This is why "Hold" is not a failsafe. A failsafe is a predetermined point set to neutralize/minimize controls, not hold full cyclics, full pitch, or full piro.

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05-04-2009 03:36 PM  9 years agoPost 14
duke666

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Hampshire, UK

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Yes agreed, that was the point of my original post. As when I fitted the TM7 module I lost the fail safes. I shall be changing my radio and receivers shortly to regain what I consider safety (just in case).

Duke

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05-04-2009 07:41 PM  9 years agoPost 15
Barney

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Inverness Scotland

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Hold/pre-sets it matters little. With hold function set, it will at least travel the direction it is already moving so is at least Predictive where its going. (good or bad)

Pre-sets..model will likely cause a sudden change in direction with no warning and it would be luck for the Pre-set to match the current control input. So not predictive

The important thing is to get the power level reduced to idle/cut as a helicopter is no Glider.

If you have a power failure/Rx failure none of the above will help you.

SPARTANRC Team pilot

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05-04-2009 11:11 PM  9 years agoPost 16
PJRono

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Minnesota, Ya!

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Actually your statement is not true. Once the heli locks out it could go anywhere reguardless of failsafe settings or not. Any heli I have seen go into lockout over the last 10 years has never survived the lockout. The main thing with failsafes is to cut throttle and minimize controls which WILL help if it goes into people and possibly save some damage to the heli. Most helis that go into lockout crash somewhere near where they are at.

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05-05-2009 12:18 AM  9 years agoPost 17
Barney

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Inverness Scotland

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I think if you read my post more closely you will see I mentioned the importance of the throttle being closed. That is the crux of the matter. As soon as a helicopter losses power it sinks and will travel only a short distance. A helicopter is no glider

If you set your flight[/I] controls to hold you get a reasonable indication of the models likely path whether you were mid piro or in FFF.

If you had used Preset on the flight controls e.g. mid stick it could flip wildly out of said piro any direction.

SPARTANRC Team pilot

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05-05-2009 03:23 AM  9 years agoPost 18
Thomas L Erb

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Alliance ohio

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I agree with Barney. the throttle is the most important. Battery failsafe will lower the throttle before the battery voltage gets to low and works well unless you have an abrupt battery loss all together in which it doesnt matter where you have your setttings at. But it has been my experience that any chance of a predicitable flight path is better then guessing where the best place to set the controls is. I have lived thru 3 lockouts and survived them all 3 because of my hold settings. Any other movements would have caused disaster in my experience. Thats my story and i'm sticken to it

Tom

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05-05-2009 11:41 AM  9 years agoPost 19
DougV

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Miramar, Florida - USA (Ft. Lauderdale)

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Same here, F/S on throttle only everything else holds, even on my 8 and 14 channels FASST systems. Now on my airplanes and jets, I like to add a little up elevator with a little left turn, but then again, what happen if I’m inverted?

Doug.
P.S. In a rare case that a FASST system go into a lock-out, the throttle will fail safe at 3.4v but you will still have control of the Heli down to 2.7v.

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05-05-2009 03:10 PM  9 years agoPost 20
PJRono

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Minnesota, Ya!

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We all agree that the throttle is the most important, no question about that. That's why the manufacturers put it there too.

But the question here is: Is "Hold" really a failsafe?

I still say no, with everything at neutral and throttle cut, a heli is unstable and will "crash" near to where it is and usually quite quickly!

If you skip me I can't play!

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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › FAIL SAFE ON 617FS
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