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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › using 6V with Futaba servos
02-03-2010 07:12 AM  8 years agoPost 1
gboden

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Chugiak, AK

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There may already be a discusion on this. If so just send me in the right direction. Has anyone tested or successfully used 6V batteries with say 9252 futaba servos. I know Futaba says to only use 4.8 but JR has specs with both. I'm looking at setting up a AR7100R with a 6V battery.

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02-03-2010 08:59 AM  8 years agoPost 2
OICU812

rrMaster

Edson, Alberta, Canada

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I ran 9252 in my Raptor for a year with no issues at all, others may chime in but I am certain they are just fine. Those 4.8 ratings on many of Futaba servos are back from the nicad rx pack days.

...Once upon a time there were Nitros, flybars and frequency pins...

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02-03-2010 11:36 AM  8 years agoPost 3
rcjon

rrVeteran

Macon, GA

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I ran 9252 in my Raptor for a year with no issues at all,
+1

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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02-03-2010 01:23 PM  8 years agoPost 4
Jim Patterson

rrApprentice

AREA 51 Roswell

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The 6 volts needs to be tightly regulated. No 6 volt nicad or hydride packs. The 9252's will get warm just setting in a no load condition. Make sure all your linkage is set-up with no excessive tightness or binding. If you have an adjustable reg. set it at 5.5. Don't feed this higher voltage to a 401 ,601, or 611. 5 volts max to these.

This of course is my personal opinion, others may / will disagree. I strive for longevity in my helis. Squeezing that last bit of power out of the electronics only shortens their lifespan.

Highly addicted to carbon fiber.....

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02-03-2010 01:40 PM  8 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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I also have ran my 9252's on 6V *regulated* for at least 3 years now.
I'm looking at setting up a AR7100R with a 6V battery.
which battery pack are you putting on it? I haven't used an AR7100 but I thought the cyclic servos have the power passed through directly so your swashplate servos will get the full voltage of whatever pack you put on there.

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02-03-2010 02:53 PM  8 years agoPost 6
Mioca

rrApprentice

Budokai Tenkaichi

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I never used 4.8V on Futaba servos... 0.0% of problems
6.6V since a long time go, speed +, torque +

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02-03-2010 05:17 PM  8 years agoPost 7
BarracudaHockey

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Jacksonville FL

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+1 on 6v REGULATED for 9252's (or any non tail rotor servo)

Andy
AMA 77227
http://www.jaxrc.com

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02-03-2010 05:22 PM  8 years agoPost 8
gboden

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Chugiak, AK

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Thanks for all the input guys.
This of course is my personal opinion, others may / will disagree. I strive for longevity in my helis. Squeezing that last bit of power out of the electronics only shortens their lifespan.
The thing is that I am not trying for lots of power or anything out of the ordinary. Normal sport flying with the possibility of a fuse. The AR7100R recommends 6V or higher to work properly. It regulates the throttle, gear, rudder, and aux 2 down to 5.2V and the cyclic servos are at the mercy of the battery. Looking at a 2700 mah 6V JR battery.

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02-03-2010 05:28 PM  8 years agoPost 9
jschenck

rrProfessor

La Vista, NE.

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Looking at a 2700 mah 6V JR battery.
If that's a 5 cell NiCD or NiMH it will be over 7V charged and not a good choice for the 9252's. 6V is the stop flying voltage of a 5-cell Nickel based battery pack.

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02-03-2010 05:33 PM  8 years agoPost 10
jschenck

rrProfessor

La Vista, NE.

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since you are in Gainseville, might be worth a drive up to Jacksonville to talk to some of the heli guys up there. I here there are some helpful folks around there (*cough* Barracuda).

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02-03-2010 06:13 PM  8 years agoPost 11
Mioca

rrApprentice

Budokai Tenkaichi

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the specs from Futaba are 6V = 5 cell 1.2V so 7.2V full charged and not 6V regulated volts... I have been using the A123 batts since some years ago with no problems, my friends neither.

If the 6V were regulated then 4.8V should be also regulated and you may not use a 4 cell NiCd/NiMh for the 4.8 servos because it would be 6.0V full charged.
I don't know anyone that uses a 4.8v batt regulated,

So 4.8V = 4 cells not regulated.
So 6.0V = 5 cells not regulated.

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02-03-2010 06:48 PM  8 years agoPost 12
BarracudaHockey

rrMaster

Jacksonville FL

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Please be clear that I'm speaking specifically of the aforementioned 9252 servos which are only rated 4.8v (4 cell pack)

Andy
AMA 77227
http://www.jaxrc.com

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02-04-2010 06:19 PM  8 years agoPost 13
Smok

rrApprentice

Antwerp, Belgium

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A charged 4 cell pack might actually provide over 5.5V, so I would agree that the statement of no more than 4.8V should actually read "no more than 4 NiCd / NiMH in a pack". So 5.5V should be fine and possibly 6V regulated would be still within the tolerance, depending on how hard the servo must work. A servo connected to a gyro, FBL or even a governor - will get much harder workout than one hooked directly to the Rx, unless the pilot is a 3D hotshot and flys with crack moves most of the time, IMHO..

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02-04-2010 07:59 PM  8 years agoPost 14
gboden

rrNovice

Chugiak, AK

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I read some more on the ar7100r and the manual has a minimum of 5.5V for the limiter to work properly. Not 6V like I said. I am going to try regulated 6V or 5.6V to the reciever. The reciever will regulate again to 5.2V for the gyro and throttle. Or I may just get away from the whole idea of using the 7100r and just get a gov, a regular reciever and a 4.8V battery. Got a couple months till I buy my gasser which is where I will use it. Either way, it seems that over doing the volts on 9252's is just a bad idea.

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02-05-2010 02:21 AM  8 years agoPost 15
Mioca

rrApprentice

Budokai Tenkaichi

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I think if you buy a 4.8V pack it's a stupid idea.
because if you kill or lose one cell in flight you will have 3.6V for the servos, not enough power to feed the equipment.

I would never use a 4 cell pack in my heli, only 5 cells and over..
hope you understand the problem.

I remember you that the 4.8V pack is 6V full charged for only a few seconds when you power on the heli then it drops fast to 5.5V...5V... not enough if you need 5.5V for the Rx.

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02-05-2010 04:08 AM  8 years agoPost 16
Thomas L Erb

rrKey Veteran

Alliance ohio

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MIOCA
I think if you buy a 4.8V pack it's a stupid idea.
because if you kill or lose one cell in flight you will have 3.6V for the servos, not enough power to feed the equipment.
just an FYI if you are using a nimh battery just remember that they only fail open which means they go to 0 volts in the pack.
secondly it is not "stupid" to fly a 4.8 pack. That is all i have ever run on my helis so i never had a regulator fail either LOLOL. They just need to always be a sub-c cell or bigger to insure enough amperage when needed. with proper care i always get 4-5 seasons out of my batteries and replace them only due to age. most all still have 98% capacity when i replace them.

Tom :}

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02-05-2010 11:54 PM  8 years agoPost 17
Pepe Toño

rrApprentice

Mexico, DF - MEXICO

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ARIZONA
the best way to have 6v regulated was whit ARIZONA REG from FROMECO. I use this setup on my Raptor 903D.

ARIZONA FROMECO

Un saludo desde Mexico

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02-06-2010 08:29 AM  8 years agoPost 18
Knud Pedersen

rrKey Veteran

Denmark - Europe

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S9252 AND Fromeco Arizona
Hi
I did fly my 9252 on 6V, using the Fromeco Aricona, in my Fury Extreme for over 2 years. No Problem!

I did use fromeco Peerless and relion batteries (litiumion)

I have also used 9451 on 6V without any problem!

ChopperKnud
Team Miniature Aircraft
ThePitchbrothers

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