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HelicopterRadio - Futaba FASST › Futaba PS10
02-12-2018 10:42 PM  7 days agoPost 1
JLF92677

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Southern California

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Does anyone know what is the fail safe mode for Futaba PS10 regulator? In other words, if the regulator fails does it continue to conduct and provide unregulated voltage to receiver or does it stop conducting?

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02-16-2018 10:14 AM  4 days agoPost 2
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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/
/

No fail mode... If your pack is in trouble, your bec would be in trouble too.

/

Saludos cordiales,

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02-17-2018 02:10 PM  2 days agoPost 3
Dr.Ben

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Richmond, VA, USA

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Knowing the way Futaba is about safety, I will hazard it would go to pass through, but it would depend on the severity of the failure of the unit I suppose. If enough magic smoke comes out, it could ultimately break the circuit.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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02-17-2018 03:53 PM  2 days agoPost 4
wjvail

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Meridian, Mississippi

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Don't know the answer to the question.

Someone needs to hook one up and pull 20 amps out of it 'till something happens. Not it! Somebody else needs to hook one up and pull 20 amps out of it...

"Well, Nothing bad can happen now."

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02-17-2018 05:22 PM  2 days agoPost 5
JLF92677

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Southern California

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Rojoalfa
Rojoalfa
No fail mode... If your pack is in trouble, your bec would be in trouble
you totally missed the question.

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02-17-2018 05:26 PM  2 days agoPost 6
JLF92677

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Southern California

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Dr.Ben, barring severe over current, yes I would hope it would fail on pass through unregulated mode. It would be good if someone (Futaba) can confirm. Thank for your reply.

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02-17-2018 05:32 PM  2 days agoPost 7
JLF92677

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Southern California

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wjvail
wjvail
Someone needs to hook one up and pull 20 amps out of it 'till something happens.
Agreed!!! Perhaps Futaba will volunteer... I would hate burning $69 doing this test for them.

BTW, I enjoyed reading your Aling 700 XN build post. Well done.

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02-17-2018 06:38 PM  2 days agoPost 8
Dr.Ben

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Richmond, VA, USA

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I can get an answer from Japan. PM me in 3 weeks when Nick is back from his road trip.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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02-18-2018 03:34 PM  1 day agoPost 9
wjvail

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Meridian, Mississippi

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JLF92677
Agreed!!! Perhaps Futaba will volunteer... I would hate burning $69 doing this test for them.

BTW, I enjoyed reading your Aling 700 XN build post. Well done.
I guess there are two questions. If I've read the literature correctly the PS10 is rated for 5.2 volts output and 7.0 amp continuous 13.0 peak output.

The questions are:
- If a receiver pack voltage drops below 5.2 volts, how does the regulator respond? I would only be guessing but I would bet it goes into a pass-through mode. I believe that is what Ben was suggesting. I also see that the regulator is rated for 6.0 to 12.6 volts input so it is a valid question to ask, what does it do with <6.0 volts input.
- The other question would be, and the one I joked about earlier, what does it do in an over current condition? Again I'm only guessing but I got money that says it begins to overheat and reduces current and/or voltage to protect itself.

There are other questions such as:
- why is it 2.4ghz only?
- why can't I put it after the receiver to protect a LV tail servo?
- why is it a PS10 instead of a PS7?
- Why does Tower call this a "Futaba PS10 10Amp Votage Regulator Rx" when nothing about it is 10 amp? https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXBHZV

I suppose these are less critical questions. My dad taught me to be very careful of "why" questions- they are usually a dead end.

Those guys at Futaba got some 40 pound heads and I'm pretty sure they did something smart. Dr. Ben will be the source of the real answers.

Cheers on the 700XN build. Thanks for commenting. Sometimes I feel like I'm talking to myself.

"Well, Nothing bad can happen now."

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02-19-2018 03:39 PM  22 hours agoPost 10
Four Stroker

rrElite Veteran

Atlanta

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The PS-10 is not much of a regulator. The originals (I had two of them) were recalled. They would randomly fail in flight and then reset or something. My 600N would drop 3 feet and rotate 90 degrees before the receiver (Futaba 6008HS) would catch up. Very entertaining. I send them in and received two new ones with a white dot. If yours does not have a white dot, send it in for replacement.

I tested the old and new ones by putting a 4 Amp load (big resister) on the output. At 6.6 volts input the output was 4.4 volts! This regulator is not good enough for a helicopter with real servos. I still have one running three 9202 analog servos - because I will replace them some day with 9250 5 Volt only servos.

On the other hand the PS-01 tail servo regulator seems fine and I have been using two of them for several years with typical 50 in-oz tail servos.

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02-19-2018 09:33 PM  16 hours agoPost 11
Grimracer

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Eau Claire WI

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I have a bunch of these.. In Planes helis and boats.. Never had one give me a lick of issues. My big D7 has 3 of them in it for each of the power systems. same with my P-47.. I have them in some of my helis too BUT.. I am a scale pilot so I dont stress them all that much.
Grim

Michael J Zaborowski

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HelicopterRadio - Futaba FASST › Futaba PS10
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