[NSRCA-discussion] Regulator

Thu Dec 4 13:22:33 AKST 2008

Jay,
 I run my Futaba servos (even ones rated for "4.8V only") on 6.0V with 2 Thunderpower 730 LiPO packs and 2 Tech-Aero regulators. Not a problem. Here's my understanding of the "4.8V only" Futaba servo deal: In the old days Futaba stated that their servos could be run on either a 4-cell alkaline battery pack or a 4-cell NiCad pack. Well, a 4-cell alkaline battery pack is nominally 6.0V. If you look at a 4-cell NiCad pack when it comes off the charger it's not 4.8V. I know they say to use a 4.8v pack only but I think you have to read between the lines here. First of all, they're assuming that most people will not be using a regulator. Just a fully charged battery pack. They don't want you to use a 5-cell pack because the voltage is pretty high on those when they're fully charged. That's why I believe they say "4.8V only". Because most people think of a 4-cell niCad pack as 4.8V. It isn't though. Now, if you run a regulator, you'll always have pretty
 close to the regulated voltage and in that case the cell count doesn't really matter. I think if you put a voltmeter on a fully charged 4-cell niCad pack you might be surprised.

John Pavlick

--- On Thu, 12/4/08, Keith Hoard <khoard at gmail.com> wrote:

From: Keith Hoard <khoard at gmail.com>
Subject: Re: [NSRCA-discussion] Regulator
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Date: Thursday, December 4, 2008, 9:32 PM

I ran S9151's all last year on a 2S-A123 pack with no problemo's. . .

The 2S-A123 cells weigh 79 grams nekked. . 

On Thu, Dec 4, 2008 at 3:22 PM, Jay Marshall <lightfoot at sc.rr.com> wrote:

I am using S9151 for the rudder, 2ea. S9650 for the elevators and 2ea BLS451 for the ailerons. The S9151 is not rated at 6.0V according the Futaba Digital Servo site. There are also other digital servos that are not rated.

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Archie Stafford
Sent: Thursday, December 04, 2008 4:12 PM
To: 'General pattern discussion'
Subject: Re: [NSRCA-discussion] Regulator

Jay,

What servos are you running?  If you are flying Futaba, ALL of their servos will work fine on 6.1V or higher.  They recommend 4.8 on some of their heli servos as the Gyro only runs on 4.8, but all of their digitals will work, including the heli ones on 6.1V or a little higher.  I personally regulate all my stuff to 6.5V and never had a problem with any of them,

Any other brands I can't speak for.

Arch
Team Futaba

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Jay Marshall
Sent: Friday, December 05, 2008 1:35 AM
To: 'General pattern discussion'
Subject: Re: [NSRCA-discussion] Regulator

I would still need regulators to keep a bad pack/wiring/switch from taking down the whole system; this is the real reason for a dual battery setup. In addition, I think the servos I have selected are only rated at 4.6V.

Jay Marshall 
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Keith Hoard
Sent: Thursday, December 04, 2008 3:44 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Regulator

Use 2-cell A123 packs.  No regulator needed. . . You can get the cells from a Black & Decker VPX battery packs for about $20 at Wal-Mart. . .

On Thu, Dec 4, 2008 at 2:34 PM, Jay Marshall <lightfoot at sc.rr.com> wrote:

Thanks for all of the suggestions. Now I have to make a decision – but not until January!

Jay Marshall 
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Tommy Scarmardo
Sent: Thursday, December 04, 2008 1:24 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Regulator

The neatest and best system is by Power Box which makes digital

switches with built in regulators.....simple and trouble free. I believe

they make one that is pre made for double batteries. I have the single

battery switch in my pattern plane and like it very much. The switches 

cannot be turned on or off by accident. I first saw them in CPLR's

pattern ship. Sold by Chief Aircraft and a couple of other places I can't

recall at the moment.

tommy s

--- On Thu, 12/4/08, Jay Marshall <lightfoot at sc.rr.com> wrote:

From: Jay Marshall <lightfoot at sc.rr.com>
Subject: [NSRCA-discussion] Regulator
To: nsrca-discussion at lists.nsrca.org
Date: Thursday, December 4, 2008, 10:45 AM

I plan to use a two battery system on my new plane, probably LiPo. Any suggestions on regulators?

Jay Marshall 
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Keith Hoard
Collierville, TN
khoard at gmail.com
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Keith Hoard
Collierville, TN
khoard at gmail.com

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