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HomeAircraftHelicopterHelicopter Main Discussion › Regulator or LiFe
02-25-2013 02:32 AM  5 years agoPost 21
RCMUstang

rrNovice

Rockville, MD - USA

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I've been running a 2S 2500 mah pack on my Trex700. It's operated flawlessly. I can get 4-6 flights very conservatively, plus you can recharge a LiFe pack quickly.

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02-25-2013 02:47 AM  5 years agoPost 22
hobby_man

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MPLS, MN

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2s 2100 Life on my 700E fbl. I can get 8 flights on it
I have 2s life on all my planks and now on all of my heli's
any servo rated for 6 volts now has a life pack powering it.

No Regulators, less weight, no BEC

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02-25-2013 11:09 AM  5 years agoPost 23
Richardmid1

rrProfessor

Leeds, England

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You don't need a heavy duty switch.
RX packs aren't the same as flight packs.
5-10 amps is the most you'll need.
I mean heck...all the power needed is delivered through servo wires.
My switch is a JR and that's all it is...servo wire and a light duty switch.
Its not so much the switch but the thin wire they come with, it can't handle 5-10 amps. I suppose you could solder an extra servo lead into the switch so you have 2 leads and plugs going to the RX like most high powered regulators and BEC's have.

60% of the time, it works every time!

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02-25-2013 11:18 AM  5 years agoPost 24
Peter Wales

rrElite Veteran

Orlando Fl

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I use a deans connector as a switch. Thick wires into the socket from the battery and two servo wires out of the plug, one usually to the Rx and the other to the V-bar.

Peter Wales
http://scalehelicopters.org

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02-25-2013 03:06 PM  5 years agoPost 25
Richardmid1

rrProfessor

Leeds, England

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I use a deans connector as a switch. Thick wires into the socket from the battery and two servo wires out of the plug, one usually to the Rx and the other to the V-bar.
Yes thats another way and I did exactly that on my 700e with the LiFe pack at the rear of the heli. On my nitro however I would be struggling for a place to get my fingers to unplug the connectors with the LiFe pack being at the front and no room at the rear of the heli.

60% of the time, it works every time!

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02-25-2013 03:41 PM  5 years agoPost 26
crash80

rrNovice

San Angelo, Texas

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I have been looking into the LiFe batts for some time now also but only one thing keeps me from converting to it. All of my Futaba tail servos are 4.8V only. I have always used an inline regulator to step it down from 6V to 5.2V.. What do you guys recommend to step the LiFe 6.6V down to acceptable tail servo voltage?

T.J.

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02-25-2013 03:59 PM  5 years agoPost 27
Richardmid1

rrProfessor

Leeds, England

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You can simply run 2 inline step down leads or one of these bad boys..

http://www.fast-lad.co.uk/store/fut...35-p-18283.html

There are also many people using 4.8v specific futaba tail servos on REGULATED 6v with no problems infact this is the voltage of a fully charged 4.8v Nimh pack so as long as its a regulater 6v its fine. The reason they say 4.8v only is as opposed to using a 6v Nimh Rx pack which would be over 7v fully charged. 4.8v servo spec should also read 6v REGULATED IMO.

Obviously 5v REGULATED is the best option to put your mind at rest.

60% of the time, it works every time!

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02-25-2013 05:35 PM  5 years agoPost 28
Ace Dude

rrProfessor

USA

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Still using my Fromeco Arizona regulator and it works fine with a LiFe battery too.

  

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02-25-2013 06:08 PM  5 years agoPost 29
YSRRider

rrElite Veteran

usa

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I inquired about this last spring and got zero answers, it would appear that no one builds helis anymore. Everyone just buys RTF helis from wal-mart now. anyways. I did my research and I narrowed my choices down to the Western Robotics Hercules linear BEC or a Gryphon. WB has great reviews and for $50 the price was right. Its a high quality product at a dirt cheap price. I forget what voltage it accepts but to power my stuff off a 6.6V Life pack it barely breaks a sweat. What many people fail to think about is that even though your servos may accept a higher voltage, when you are putting a load on the servos, you are getting spikes and dips in the power. With a regulator of some sort, your e-components will always have a steady 5.4-6V. I am using a 6.6V VOLTZ Life pack and so far its been a quality pack. Charges and balances very consistent.

Another nice thing about the Hercules is that you can plug in a remote LED warning light which is insanely bright, you can plug a power switch into it and you can also plug in a small siren for low battery.

I was pleased with my research on the Gryphon and love the "remove before flight" key/switch but its a bit of a gimmick. The regulator is pricey and I didnt see any benefits over the WB for my particular application. If I was running a large scale turbine heli with lights all over and perhaps some other motorized accessories, retracts? I would consider the Gryphon. Even then I think the WB would work with no issues. I think it works with up to a 28V pack???? I forget. On a non-electric heli you would never need such a battery anyways.

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02-25-2013 06:08 PM  5 years agoPost 30
Four Stroker

rrElite Veteran

Atlanta

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Yeah, me too ! Fromeco Sahara

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02-25-2013 06:19 PM  5 years agoPost 31
Eleven_Bravo

rrVeteran

Salisbury,NC

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Fromeco makes GREAT products for those of you who have never used them and their li-ion batts are top notch also.

I think I am going to give the unregulated life approach a try I have always wondered about it myself. Thanks for the great info posted in this thread.

I also have a question if your reg has two outputs can you power your ignition with one and your Rx with the other and eliminate the need for a dual batt setup. Iknow you can with a CC BEC pro because the two outputs are isolated from one another but can it be done with all regs that have two outputs???

ENGAGE!!

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02-25-2013 07:27 PM  5 years agoPost 32
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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A few things about the Hercules Linear Regulator (WRL-HBECLE) - or any, simple, regulator.
1) It uses 2 "servo leads" to power the receiver.
2) It is rated for a 2 cell LiPo - NOT a 2 cell LiFe.
3) There is only 1 voltage option

The problems with the 2 servo leads:
The servo lead connector (not the wire) is rated for around 4amps.
You have to find 2 open channels on your receiver or build a "Y" harness so you can share channels.

The problem with the input rating:
The linear regulator has about a 1v "overhead" between the input & the output.
With a 6v output, you are safe down to about a 7v input. Below 7v, the output voltage will start to sag in relationship to the input voltage.

The voltage option:
The receiver, the FBL (or gyro) and all servos are using the same voltage. You have to set the voltage for the lowest voltage or use step-down regulators for the servos that need lower voltages.

The Gryphon (or the Scott Gray X2) fits between the 3 swash servos and the receiver (or the FBL) and they actually have 2 separate regulators internally.
The 3 swash servos get voltage & current directly from a programmable regulator that can be set to 6, 6.5 or LiPo voltage
The RX, FBL (or gyro) and servos attached to the RX or FBL get a fixed 5.2v (fed back to the RX through the 3 swash connections).

But, the common thing to keep in mind is most regulators do not recommend a LiFe as the input. It should be LiPo.

Just don't use the Castle Create BEC Pro 20.

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02-25-2013 08:06 PM  5 years agoPost 33
hobby_man

rrNovice

MPLS, MN

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Is there an issue with the CC BEC?

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02-25-2013 09:04 PM  5 years agoPost 34
Four Stroker

rrElite Veteran

Atlanta

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The Fromeco Sahara is a low drop out regulator and only has a tiny ~0.05 volt overhead. It has a huge heatsink and is good for more amps than you will ever need. You can solder any leads you want on it.

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02-25-2013 09:38 PM  5 years agoPost 35
heli-cuzz

rrElite Veteran

Pittston, Pa. USA

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Are there any big name sponsored pros running Life packs?
Can anyone answer my non answered question from the first page?

Fury 55 NIB Furion6 CGY750 fbl helicopter-Frenzy CGY750 fbl nitro-Frenzy fbl NOBAR90

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02-25-2013 09:41 PM  5 years agoPost 36
rpat

rrElite Veteran

Weirton, W. Va.

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Futaba makes two different switches. They make a small one and then they make a heavy duty one for digital servos. I use the heavy duty one on all of my stuff from slab turbine to helis, running either a life or a lipo.Iactually run both on my turbine, lipo on the turbine and life on the airframe.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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02-25-2013 10:06 PM  5 years agoPost 37
ebonicrobot

rrApprentice

East Bay, CA

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I use Hercules Super Bec on the Avant and LiFe pack on the E8. Both are great

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02-25-2013 10:15 PM  5 years agoPost 38
Ace Dude

rrProfessor

USA

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But, the common thing to keep in mind is most regulators do not recommend a LiFe as the input. It should be LiPo.
I did confirm with Fromeco their Arizona regulator will work fine with a LiFe pack because it's a LDO regulator.

  

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02-25-2013 10:19 PM  5 years agoPost 39
heli-cuzz

rrElite Veteran

Pittston, Pa. USA

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Guess all the top pros use regulators.

Fury 55 NIB Furion6 CGY750 fbl helicopter-Frenzy CGY750 fbl nitro-Frenzy fbl NOBAR90

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02-25-2013 10:21 PM  5 years agoPost 40
JKos

rrProfessor

Redondo Beach, CA

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Aren't the pros using straight 2S?

- John

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HomeAircraftHelicopterHelicopter Main Discussion › Regulator or LiFe
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