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HelicopterMain Discussion › aligin 6a bec with a 6.6 life.?
12-19-2013 12:15 AM  3 years agoPost 1
Raptorman

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warren ohio

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has anyone used a align 6a bec with a 6.6 life battery.? can it be used with a life batt,? considering buying one to put on a older heli with analog airtronics servos rated at 4.8 volts

https://rc.runryder.com/fastphoto/16416/k10382a_1-.jpg

the lower the manuver the more the wow raptor 90 and hawk sport,

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12-19-2013 01:37 AM  3 years agoPost 2
Ronald Thomas

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Gainesville, Fl, USA

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I cannot see what the max voltage input is from that pic but if it over 6.6 volts, the BEC will not care what chemistry you use.

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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12-19-2013 01:45 AM  3 years agoPost 3
ticedoff8

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Morgan Hill, CA. USA

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You might fry the 4.8v servos.

The RCE-B6X output is 5.8v. And, the RCE-B6X kit typically includes a dropping diode for the tail-rotor servo (rated at 4.8v)

The input is rated at 7.4v LiPo.

I do not know what the cutoff voltage is for the RCE-B6X.

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12-19-2013 09:39 AM  3 years agoPost 4
datidun

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N Ireland

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The tail step down will only reduce the voltage down to about 5.8 volts,that may be still to high for a 4.8v rated tail servo.

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12-19-2013 10:22 AM  3 years agoPost 5
coolice

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Northamptonshire,​England

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Hey.

I'd suggest leaving out the regulator and fitting the Align step-down between the LiFe pack and receiver. This will reduce the 6.6 volts down to about 5.5/5.6 which will be ok on NiCAD capable servos. You could do this between the Align regulator and receiver to achieve the same voltage drop.

My only concern with the step-down method is the reliability of the step-down itself, some have been known to fail due to broken wires.
Perhaps fit two power feeds from LiFe pack to receiver and two step-downs for added insurance.
Or just fit a NiMh pack at 4.8 volts and be old school.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-19-2013 10:26 AM  3 years agoPost 6
Richardmid1

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Leeds, England

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It will work fine but the voltage indicator lights are designed for 2s Li-po so they will be useless and probably only the final red light will be on so you won't be able to use it as an indicator of your life pack charge.

The BEC outputs 5.8v which is totally fine for 4.8v only servos. The stepdown lead steps the voltage down to 5.1v for the tail which again is fine for a 4.8v tail servo.

60% of the time, it works every time!

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12-19-2013 10:30 AM  3 years agoPost 7
Richardmid1

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Leeds, England

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Be careful with that, the step down only reduces the voltage by 0.7v and a fully charger LiFe is around 7.2v so at first the voltage will be as high as 6.5v and will drop to around 5.9v. Im sure these voltages are fine for 4.8v only servos but is it worth the risk?

60% of the time, it works every time!

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12-19-2013 12:02 PM  3 years agoPost 8
datidun

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N Ireland

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I thought those Align step downs were for tail servos only,or made for that matter,might as well use a good nimh 4.8v or Sub C would be even better if your not concerned about extra weight.

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12-19-2013 12:06 PM  3 years agoPost 9
Richardmid1

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Leeds, England

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They can be used on any servo, they can handle 5A continuous.

4.8v Nimh would be far easier in this case though.

60% of the time, it works every time!

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12-19-2013 12:37 PM  3 years agoPost 10
coolice

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Northamptonshire,​England

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[url=http://shop.align.com.tw/product_info.php?products_id=2276]

They are marketed that they can be used between the servo and receiver or regulator and receiver. However, if the components are only rated to 5amps then this would limit their use to flybarred models only and beginner models, that do not get flown hard.

I've read their may be two diodes in the step-down, so if this is the case would the load be shared over the two?

In any case, the more I think about this and the nostalgia of the model, perhaps a basic NiCad/NiMh pack will be best.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-19-2013 02:25 PM  3 years agoPost 11
Ronald Thomas

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Gainesville, Fl, USA

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That step down between the BEC and rx is a bad idea. All of the current needed for a lll the electronics are join to run throughout that tiny tail step down. I see a brown out in the future
You may want to consider an upgrade to a better BEC/Regulator, better servos, OR a new NIMH pack to run the electronics directly (I would only do that if this is a sport flying easy going bird though).

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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12-19-2013 03:09 PM  3 years agoPost 12
Pistol Pete

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Seffner, FL

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Agree with Ron. No stepdown before Rx to feed 5 servos.

Most diode stepdowns are rated at 1A or 3A.

~~Enjoying the hobby one flight at a time~~

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12-19-2013 03:22 PM  3 years agoPost 13
Richardmid1

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Leeds, England

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Align rates theirs at 5A continous! But I agree I would not like to test this out!

Remember the OP will be running older analogue servos so I doubt the current draw will be more than about 3 amps.

60% of the time, it works every time!

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12-19-2013 09:11 PM  3 years agoPost 14
coolice

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Northamptonshire,​England

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Hey All.

Good idea or bad, it's been done in the past by many, of course this was perhaps before the major boom in 2.4ghz. However as has been said, you need to consider the model and the type of flying that will be expected of it to trust this setup or not.
As above an older machine that is fly barred will not pull the amps a more modern 3D machine will and many a model has been flown and 3D'd on the Align BEC's/2in1's that are only capable of 5~6 amps max. Again this was then before the FBL boom which dictates a higher amp capability.

Another point we are also over looking, is the fact that a single servo style plug is only rated to about 5amps anyway. So with one single connection point to the receiver and servo's is limited.

If it was me I wouldn't do it, I don't think the diode itself is the major problem here, but just their design. I seem to recall hearing the connection to the diode has failed in the past through vibration no doubt.

Fit a NiCad/NiMh and have fun with the old timer
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-19-2013 11:40 PM  3 years agoPost 15
Raptorman

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warren ohio

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Ok thanks a lot guys

Im going to just get a 4.8 2500mah pack for the old century hawk maybe a sub c pack.

I don't know about the sub c 4.8 packs do they give more amp/power than the aa packs.?

just thought about the 6.6 packs because I use them in my gas and glow planes.

the lower the manuver the more the wow raptor 90 and hawk sport,

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12-20-2013 01:45 AM  3 years agoPost 16
Four Stroker

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Atlanta

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Go to Hangtimes / NoBS and get a Sanyo 4/5 FAUP pack. Just as good as sub C but smaller and lighter.

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