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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › Anybody using a Fromeco Relion 2600 Mah pack?
04-01-2010 04:03 PM  10 years ago
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George Matthews

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N.W. Ohio

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Anybody using a Fromeco Relion 2600 Mah pack?
Is the Relion 2600 Mah pack enough in a 90 sized heli?
George Matthews
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04-01-2010 04:24 PM  10 years ago
n808

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Seattle, WA - USA

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Indeed, but adjust number of flights accordingly. I average 300-350 mAh per flight, both 50 and 90 sized, but my Trex 700 has brushless BLS451 on cyclic. And don't fly it too low, of course.
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04-01-2010 04:27 PM  10 years ago
George Matthews

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N.W. Ohio

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Thanks for the reply.
I am looking to get 3 to 4 flights per charge.
I have be running 1950 5 cell Mah NiMh packs and have been getting 3 to 4 flights per charge.
So I figured the 2600 Li Ion would put me in the same ball park.
George Matthews
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04-01-2010 04:32 PM  10 years ago
z11355

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New England

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I use them for all my machines.

important thing to remember is that a NiMH type pack will give you something like 65% of it's capacity before most responsible pilots will say 'time to recharge'. Lithium cells will give more like 80% so thats worth an extra flight right there.

I can't say enough good things about Fromeco's products or their customer service. As a matter of fact, I should have a new pack and customized Sahara regulator in my mailbox today.
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04-01-2010 04:34 PM  10 years ago
George Matthews

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N.W. Ohio

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What kind of customization are you having done to your Sahara?
I am using a Sahara with deans in and two jr's out.
George Matthews
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04-01-2010 07:10 PM  10 years ago
fritzthecat

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Virginia Beach, VA

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While the mah size may be adequate for a 90 heli, you are going to run into the max C rating when powering digital servos.

Fromeco recommends the 5200mah Relion for 90s due to their high amp draw.
The #s below are for the 5200 battery, cut the numbers in half for the 2600 battery.

Fritz

*************
Relion 5200 Flat
Overview Specifications Accessories Image Gallery Documents

Specifications and Requirements
Application

Charging Specs
Chemistry Type Lithium Ion or Lithium Polymer
Max Charge Rate 5.2
Number of Cells 4

Connector Specs
Connector Max "RATED" Amperage 3
Connector Type JR

Electrical Specs
Max Amperage stated by OEM 8
Max Amperage Tested by Fromeco 22
Max Voltage 8.4
Operating Voltage 7.4

Size/Mass
Height inches 11/16th
Length inches 2" 9/16th
Mass ounces 6.6
Width inches 2" 7/8th

'Send Money, Women and Guns!'
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04-02-2010 04:52 AM  10 years ago
n808

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On a recent flight max Amp draw was 3.55 Amps (Eagletree logged), that's from 3 BLS451, one JR8900G and one 9451 for throttle. I am sure others would draw more, but still well within the tested data for a 2600mAh (11Amps) and even within the OEM Amp stated (4Amps), but yes, getting somewhat close to that.

The connector type seems the bottleneck, both for 5200 and 2600. With Arizona to receiver you have power through two JR connectors, that's 6 Amps total MAX rated (as per above).

EDIT: the JR connector might be something else than the servo connectors going to the receiver... I use deans from battery to arizona, arizona uses two servo connectors to my AR7000, soon to be replaced by a 7100R regulatorless, with a deans connector directly to LiFePO4 battery.
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04-02-2010 05:02 AM  10 years ago
z11355

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New England

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simple customizations

change voltage range to approx 5->6v (instead of stock 5.4->6.4)

JR and heavy (for PowerPoles) input leads
dual output JR leads
pin-flag on/off
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04-02-2010 06:14 AM  10 years ago
n808

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Seattle, WA - USA

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Me, I am now done with regulators after my Align 2-in-1 died on one of my 50s.
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04-02-2010 12:17 PM  10 years ago
z11355

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New England

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thats odd because I'm just coming back to the hobby after about 2+ years off. I didn't 1/2 discharge my batteries like you're supposed to.

All my TBM li-ion batteries were trash; all my Fromeco's were fine.

honestly, batteries are a perishable consumable in my book and it wouldn't have bothered me if I had to spend the $$ to replace them all.
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04-02-2010 01:16 PM  10 years ago
Dr.Ben

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Richmond, VA, USA

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honestly, batteries are a perishable consumable in my book and it wouldn't have bothered me if I had to spend the $$ to replace them all.
Bingo.

I would question using any battery pack that had sat unused for a year and a half, especially when you can by good quality 2S1P 2600 packs from Central Hobbies for $28. I've used LiION's for 5 or 6 years with flawless results, but I take care of the packs and monitor them. The pack that failed after sitting would likely showed a problem when it was cycled. What was its measured capacity when you cycled it prior to flying it for the first time?

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-02-2010 03:45 PM  10 years ago
n808

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Seattle, WA - USA

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Yeah, the dead battery wasn't so much a big deal. It was mostly odd, my other Relion, about twice the age, used on and off (longest break 8 months), still works fine. The dead battery wasn't entirely dead either. It charged and discharged roughly the expected number of mAh, but dropped its voltage so quickly, it was down to 7V after the equivalent of 1 flight, then it continued the discharge, just at a lower voltage, as measured with my eLogger and a car bulb. I tried to cycle it a few times, but didn't improve. That's why I didn't trust it, but like I said, wasn't much of a deal, just surprising, and I am not complaining loudly about it.
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04-02-2010 06:47 PM  10 years ago
Dr.Ben

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Richmond, VA, USA

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Yep...

It's also been my observation the lithium cells don't go for any period of time being just "sorta" OK like a weak NiCd will. Once they start going away, you best get them the heck out of the model.

I wouldn't let the Align reg sour you on the concept entirely, though, since their reputation has taken a few hits over the years. Fromeco makes a fine product. I use the Sahara.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-05-2010 01:36 AM  10 years ago
ZAC ATTACK

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Hamilton Ontario, CANADA

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George,I have an extra one still in the bag if you want it! Deans!MAAC#77677 Medicated daily for your protection
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04-06-2010 02:07 AM  10 years ago
George Matthews

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N.W. Ohio

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Zac
Thanks for the offer but I just purchased a new one.
George Matthews
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