5 Cell (6V) NiMh battery - Regulator or No Reg.  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> 5 Cell (6V) NiMh battery - Regulator or No Reg.
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5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/29/2005 2:42:29 PM   
TailTouch



Posts: 556
Joined: 1/4/2002
From: Orlando, FL, USA
Status: offline 		Hi All.
Thinking of getting a 6.0V NiMh battery for my plane. While the Hitec Servos are rated for 6V, my concern is that it might fry my JR 700 Rx.

So, do I need a regulator is it OK without one.

Thanks.

_____________________________

Yak Hole
       Post #: 1

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/29/2005 3:22:37 PM   
michpittsman


 

Posts: 598
From: Muskegon, MI, USA
Status: offline 		I used a NoBS 6v pack with my JR 770 pcm rx and no reg and never had a glitch....Jim

_____________________________

FORTY-FIVE YEARS IN RADIO CONTROL

(in reply to TailTouch)
       Post #: 2

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/29/2005 11:29:34 PM   
JoeAirPort



Posts: 6967
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: offline 		No reg. I have several planes with 6 volt battery. A reg is totally not needed.

_____________________________

Joe AP

(in reply to michpittsman)
       Post #: 3

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/30/2005 1:57:16 AM   
olstoney



Posts: 1193
Joined: 4/6/2004
From: Cape Coral, FL, USA
Status: offline 		TailTouch,
I'm sure that many people have had no problem, on the other hand some have. I installed a 1650 Nimh 6V pack in my UCD 60 with all Hitec $40.00 each MG analog servos and a QPCM receiver. I went to Nimh instead of Nicad as the high voltage hit at 6V is reported to be not so bad. I had uncontrollable glitching in the elevator and rudder servos. Even after bleeding off voltage with an ESV, changing servos, changing the elevator Y harness to a choked type, rerouting servo leads and changing the antenna location guess what? same problem. People started thinking I was nuts until my friends did the same thing at his home on a different frequency with all Futaba gear. These were both new builds going on at the same time.The only common denominator in both planes was a 1650 6V Nimh battery. I had a 600ma 4.8v Nicad laying around and temporarily installed that and the problem disappeared.

Now you do not really want to know how much time was wasted or extra money was spent trying to figure this all out. Yes, I could have spent more money and bought a voltage regulator and have had another part to possibly fail. As it is now the plane has a 1650 ma 4.8v pack that has been reliable and gives me plenty of capacity for my flying style. IMHO the only reasons to go to 6V are for increased servo speed and torque, if that is not needed then why do it? Now if we lived in Roswell NM, there may be an explanation , but I sure do not have one for any of this. We also are not that humble and asked some of our more experienced club members to help us out with the diagnostics of our problem. We still have no difinitive answer on what may have occurred. I'm not trying to start a debate only pointing out what CAN happen.

_____________________________

If One Lays Down With Dogs-They Should Not Complain About The Fleas

(in reply to JoeAirPort)
       Post #: 4

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/30/2005 2:02:43 AM   
JoeAirPort



Posts: 6967
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: offline 		Could have been as simple as a bad battery pack, bad connector etc. You can't just assume it was the voltage when you are not 100% sure. Could be that the servos or rx did not like higher voltages. I have never had an issue with many planes that have 6 volt batteries.

quote:

ORIGINAL: olstoney

TailTouch,
I'm sure that many people have had no problem, on the other hand some have. I installed a 1650 Nimh 6V pack in my UCD 60 with all Hitec $40.00 each MG analog servos and a QPCM receiver. I went to Nimh instead of Nicad as the high voltage hit at 6V is reported to be not so bad. I had uncontrollable glitching in the elevator and rudder servos. Even after bleeding off voltage with an ESV, changing servos, changing the elevator Y harness to a choked type, rerouting servo leads and changing the antenna location guess what? same problem. People started thinking I was nuts until my friends did the same thing at his home on a different frequency with all Futaba gear. These were both new builds going on at the same time.The only common denominator in both planes was a 1650 6V Nimh battery. I had a 600ma 4.8v Nicad laying around and temporarily installed that and the problem disappeared.

Now you do not really want to know how much time was wasted or extra money was spent trying to figure this all out. Yes, I could have spent more money and bought a voltage regulator and have had another part to possibly fail. As it is now the plane has a 1650 ma 4.8v pack that has been reliable and gives me plenty of capacity for my flying style. IMHO the only reasons to go to 6V are for increased servo speed and torque, if that is not needed then why do it? Now if we lived in Roswell NM, there may be an explanation , but I sure do not have one for any of this. We also are not that humble and asked some of our more experienced club members to help us out with the diagnostics of our problem. We still have no difinitive answer on what may have occurred. I'm not trying to start a debate only pointing out what CAN happen.



_____________________________

Joe AP

(in reply to olstoney)
       Post #: 5

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/30/2005 2:34:35 AM   
TailTouch



Posts: 556
Joined: 1/4/2002
From: Orlando, FL, USA
Status: offline 		Hi Thanks so much for sharing your problem with us.

Unfortunately, I am the best pilot (Isn't that a scary thought ) at our club and most of them don't even know what a NiMh battery is.

I just want to get more speed and torque out of my servos.

I am already running a 1450 mAH NiMh battery on a regulator and 2 LiIon packs on regulators.

Just wanted to confirm if it's cool on the receiver

Thanks.

quote:

ORIGINAL: olstoney
We also are not that humble and asked some of our more experienced club members to help us out with the diagnostics of our problem. We still have no difinitive answer on what may have occurred. I'm not trying to start a debate only pointing out what CAN happen.



_____________________________

Yak Hole

(in reply to olstoney)
       Post #: 6

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/30/2005 3:17:05 PM   
RCP57


 

Posts: 373
Joined: 3/3/2002
From: Magnolia, TX, USA
Status: offline 		You DO NOT NEED a regulator with JR products, they will handle the 6v without problems. Futaba has been known to have glitch problems with 6v and therefore need to be regulated down to 5.7v. I don't know about the other brands out there.

_____________________________

Later,
Mike

(in reply to TailTouch)
       Post #: 7

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 6/30/2005 4:08:24 PM   
olstoney



Posts: 1193
Joined: 4/6/2004
From: Cape Coral, FL, USA
Status: offline 		Joe,
My setup by the way was 625 and 645 Hitec's, the Futaba setup was 3004's with a 645 on the rudder. The only thing in common was the 1650 ma 6v batteries. My batteries came from one of the best sources in the industry (I think you use them), his was a Hydramax. Actually I sent the packs back to the factory and had one cell removed from each pack (I had four) and wound up with an extra pack from the left over cells. That is the only thing that changed. The extensions are original, the Y harness for the dual elevators was changed to a choked MPI (didn't make a difference), and the problems persisted until we both went back to 4.8v. The hair puller was even after sucking my 6v batteries down for 5 minutes, the glitching was still uncontrollable. Makes me wonder why Somenzini reportely flys his QQ 140 when doing demos on 4.8v?? Like I said, I'm NOT trying to start a debate, only trying to point out what happened to us as food for thought. My new 73" IMAC ship is destined to have twin 1650 Nimh packs at 4.8v as the servo speed and torque is still way above the manufacturers specs. My point is that if you do not need any extra speed or torque they are not needed. If you buy correctly matched servos for the application at hand 6v is not needed. When I move up to 28% with power hungry digitals then that is a totally different ball game.

_____________________________

If One Lays Down With Dogs-They Should Not Complain About The Fleas

(in reply to JoeAirPort)
       Post #: 8

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 7/1/2005 5:16:05 AM   
JoeAirPort



Posts: 6967
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: offline 		Hmmm, I guess I've been lucky then. I'll have to keep my eye on that issue in the future.

quote:

ORIGINAL: olstoney

Joe,
My setup by the way was 625 and 645 Hitec's, the Futaba setup was 3004's with a 645 on the rudder. The only thing in common was the 1650 ma 6v batteries. My batteries came from one of the best sources in the industry (I think you use them), his was a Hydramax. Actually I sent the packs back to the factory and had one cell removed from each pack (I had four) and wound up with an extra pack from the left over cells. That is the only thing that changed. The extensions are original, the Y harness for the dual elevators was changed to a choked MPI (didn't make a difference), and the problems persisted until we both went back to 4.8v. The hair puller was even after sucking my 6v batteries down for 5 minutes, the glitching was still uncontrollable. Makes me wonder why Somenzini reportely flys his QQ 140 when doing demos on 4.8v?? Like I said, I'm NOT trying to start a debate, only trying to point out what happened to us as food for thought. My new 73" IMAC ship is destined to have twin 1650 Nimh packs at 4.8v as the servo speed and torque is still way above the manufacturers specs. My point is that if you do not need any extra speed or torque they are not needed. If you buy correctly matched servos for the application at hand 6v is not needed. When I move up to 28% with power hungry digitals then that is a totally different ball game.



_____________________________

Joe AP

(in reply to olstoney)
       Post #: 9

RE: 5 Cell (6V) NiMh battery - Regulator or No Reg. - 7/1/2005 9:58:38 PM   
olstoney



Posts: 1193
Joined: 4/6/2004
From: Cape Coral, FL, USA
Status: offline 		Joe,
Just goes to show you that sometimes you never know . Check out the new post I entered about the Elite and Lipos, I think I read you have an Elite and may be able to help.

_____________________________

If One Lays Down With Dogs-They Should Not Complain About The Fleas

(in reply to JoeAirPort)
       Post #: 10

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