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08-09-2010 01:14 PM  7 years agoPost 1
venture_flyer

rrApprentice

Fredericksburg VA

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Hey guys just wanted to see if you think this is over kill on a Synergy running all digital servos just to make sure I have a good power source.

http://www.fromeco.org/products/01frc7800-118/

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-09-2010 01:35 PM  7 years agoPost 2
z11355

rrMaster

New England

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that's what, a total of 6 cells? you better make sure it'll fit.

frankly, I fly a Fromeco 2600 on my machines.

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08-09-2010 03:12 PM  7 years agoPost 3
Ace Dude

rrProfessor

USA

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I'd recommend you take a look at their LiFEPO4/A123 options over their Relions.

  

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08-09-2010 03:56 PM  7 years agoPost 4
bkervaski

rrElite Veteran

Birmingham, AL, USA

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@venture_flyer - Although it will work, a Lithium Ion battery is incapable of delivering the current you need for 3D. If you're going to be banging it around, look into a LiPoly with a regulator that can deliver 15A.

I used to run Duralite Lithium Ion's with their HD regulator, once I switched to a LiPoly with the Arizona Regulator (Now I used the Reactor X2, both are great) I saw a marked improvement in performance and precision.

My $0.02, hope it helps.

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08-09-2010 03:59 PM  7 years agoPost 5
venture_flyer

rrApprentice

Fredericksburg VA

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input
Hey guys I appreciate all the input. I have been lpooking at all the options out there to see whats good. I have always ran Nicad and nicklemetal and now I am looking for a difference. I like the Fromeco line of products. I am still a little afraid of Lipos from all the unstable fires they cause. Li IonI love the sound of and the 7.4V with a reg would be awesome. (I think). Keep the ideas coming and I will keep looking at them.

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-09-2010 04:02 PM  7 years agoPost 6
bkervaski

rrElite Veteran

Birmingham, AL, USA

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There's not that many lipo incidents any more, the newer chemistry is really stable and I'd speculate that more than 95% of heli pilots use them regularly. Just buy a good popular brand battery, regulator, and charger.

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08-09-2010 04:20 PM  7 years agoPost 7
rexxigpilot

rrProfessor

Florida

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I'd recommend you take a look at their LiFEPO4/A123 options over their Relions.
I'll second that! I've been running unregulated A123 packs for about three years on various models. Best RX pack you can get IMO. A step down for the tail servo is the only thing most electronics need. Even some tail servos are now rated for 5 cell NiXX and 2S LiPo, so a step down may not be needed on your setup.

Advantages of the A123:
* no risk of fire
* pack can be left fully charged without damage
* doesn't self discharge
* regulator not needed with 6.0V servos
* price not much different than other batteries
* lots of power if needed.
* can be charged with any charger (although it is best to have a LiFe or LiIon compatible charger, which is now very common)

Disadvantages:
* a slight weight penalty compared to unregulated LiPo (need special servos to run unregualted 2S LiPo). However, an A123 pack will weigh considerably less than a similar capacity/power NiXX pack.

You may also want to look at the non A123 LiFe packs. Personally, I like the robustness and power of the A123 over the flat LiFe packs from Horizon and Hyperion.

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08-09-2010 04:42 PM  7 years agoPost 8
venture_flyer

rrApprentice

Fredericksburg VA

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packs
The reason I was asking about the Li Ion packs is because I have a 4500MAH Li Ion pack that I picked up a little while ago. The pack is pretty small in comparison to a Ni Cad pack. With the 4500Mah and it run 7.4V and with a regulator I was thinking that might work. I do however like the 4600Mah LiFe A123 packs as well.

Eric

what charger are you guys using with these packs?

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-09-2010 08:07 PM  7 years agoPost 9
Ace Dude

rrProfessor

USA

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The genuine A123s are the best, but the Hyperion/Great Planes LiFE LiFEPO4 prismatic cells have more sizes available and are easier to mount due to their size.

I'm using FMA Multi4 and Powerlab 8 chargers.

  

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08-09-2010 08:20 PM  7 years agoPost 10
Ace Dude

rrProfessor

USA

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I have ordered three of the Hyperion LiFe packs, but haven't had a chance to install them yet. I prefer them for the safety factor over LiPo.

  

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08-10-2010 07:13 PM  7 years agoPost 11
venture_flyer

rrApprentice

Fredericksburg VA

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a123
I am sure for my Synergy after looking around I will be getting one of these A123 batteries and a good charger for it. I like the responses I have gotten to this post and all I have read on line about these batteries.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-10-2010 07:54 PM  7 years agoPost 12
Ace Dude

rrProfessor

USA

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Fromeco sells genuine A123 so you can get your packs from them.

  

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08-10-2010 08:25 PM  7 years agoPost 13
fastflyer20

rrKey Veteran

N. Tonawanda, NY

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Radical RC sells A123 packs also, good place to deal with.

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08-10-2010 08:29 PM  7 years agoPost 14
venture_flyer

rrApprentice

Fredericksburg VA

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Radical RC
They do have some decent deals on there packs. I cant wait to get paid and get one of these and try them out.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-11-2010 07:27 AM  7 years agoPost 15
LonR

rrElite Veteran

Macomb,Mi

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Although it will work, a Lithium Ion battery is incapable of delivering the current you need for 3D.
A Lithium Ion battery is plenty capable of delivering the current for 3D flying so thats 1000% wrong and not true at all..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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08-11-2010 01:17 PM  7 years agoPost 16
venture_flyer

rrApprentice

Fredericksburg VA

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packs
Like I said earlier I have a 7.4V 4500 mah li ion pack that I might get charged and see if it works for me. I will get some posts up here when I try it and see the results.

eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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08-11-2010 08:49 PM  7 years agoPost 17
LonR

rrElite Veteran

Macomb,Mi

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Eric,
That 4500mAh pack will be more than enough and you'll get a good 10 flights on it.
Im well into 3D and ran a 4200mAh Duralite on my Trex 600N with Align DS610's on cyclic,JR 8900G on tail,revmax with a Hitec HS-635 on throttle.
On my Raptor 90 I ran the same setup as my T600 but used a 2600mAh fromeco and Futaba S9254 tail servo.

I have a new Velocity 50 im about finished with and running the same setup on it but i'll be useing a JR DS8231 throttle servo.

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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08-11-2010 09:49 PM  7 years agoPost 18
rexxigpilot

rrProfessor

Florida

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I don't understand the need to use a heavy 4500 mAh pack. A123 cells and newer LiPo packs can be quick charged at the field in minutes Both LiPo and A123 can be charged at about 4C. The standard A123 cells are 2300 and 1100 mAh. You won't need more power than either can produce as A123 cells are 30C continuous and 60C peak.

I have been using a 2S 2300 A123 pack on four of my nitro machines for the past couple of years. I can get 6-7 flights off these packs with safety margin to spare. The worst case is my 90 class machines which consume about 300-320 mAh per flight depending on how hard I get on the collective and cyclic. My helis have all the electronics you typically have (governor, switchglow etc.). Servos are all Futaba BLS.

Why add the extra weight, especially if you fly 3D? That's just my $0.02.

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08-11-2010 10:14 PM  7 years agoPost 19
LonR

rrElite Veteran

Macomb,Mi

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I don't understand the need to use a heavy 4500 mAh pack
I don't understand the need for a switchglow because its heavyer than a glow wire.
Why add the extra weight, especially if you fly 3D? That's just my $0.02.
Why add all the weight of a switchglow when a glow wire is clearly ALOT lighter.

A 4500mAh battery,glow wire and 6.0V reg is lighter than the things people run on there helis these days and leaves room.A switchglow,LiFEPO4/A123 alone isn't light..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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08-11-2010 11:20 PM  7 years agoPost 20
venture_flyer

rrApprentice

Fredericksburg VA

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batteries
I guess I wanted to see what was out there and when some of the guys mentioned Li Ion packs I remembered I have one already in my feld box. If I have it I am gonna try it before getting a whole new charger and battery. Here is my set up on the Synergy.

Synergy N9
YS 91.ST
GP Exhause (tuned for YS 91ST)
JR 2100R scan select reciever
JR 8717 (x3 cyclic)
JR 537 Throttle
Futaba 611 / 9256
Futaba GV-1

Thats my entire setup for my Synergy that i will be flying.

Eric

Marine Corps 98-06. Disabled veteran of Operation Enduring Freedom and Operation Iraqi Freedom.

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