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.50 size heli servos

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Old 09-07-2007, 02:43 PM
  #1
shall36
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Default .50 size heli servos

Danny,

I have a Raptor 50 and I would like to upgrade to digital servos. What JR servo would you recommend? I don't need the Best servo out there, but something that is designed to handle the load of 3D aerobatics (nothing super extreme).

Thanks!
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Old 09-07-2007, 03:15 PM
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Default RE: .50 size heli servos

I used JR8231 digital servos and had very good luck with them in my .50 sized 3D helis.
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Old 09-08-2007, 07:17 PM
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Default RE: .50 size heli servos

Thanks! I picked up two of these for my cyclic controls.

I have a G500T with 810G servo. I'm looking to upgrade to a digital JR servo for the gyro and would prefer something that can handle 6.0V. Does anything in JR fit that bill?

Thanks!
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Old 09-10-2007, 08:37 AM
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Default RE: .50 size heli servos

Tail servos are designed to handle up to 6V, but they will not handle a 5 cell nicad or nimh battery pack. If you intended to use higher voltages, I'd recommend a voltage regulator on the tail servo / gyro.
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Old 09-10-2007, 10:59 PM
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Default RE: .50 size heli servos

very nice but you'll need to regulate it to 5V

http://www.jrradios.com/Products/Def...odID=JRPS8900G
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Old 09-11-2007, 11:06 AM
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Default RE: .50 size heli servos

I assume they can't handle the 5-cell NiMH pack because when fully charged, they put out more than 6V?

Sounds like I need to get a voltage regulator (6V) AND a step-down (5.1V) for the gyro/tr servo. Kind of weird to put a voltage regulator on a NiMH pack (I think LiIO when I think voltage regulator), but OK.

In doing a lot of searching, the 6V regulators that I see are designed to work with LiIO packs. For example, Align has several regulators and step-downs, but the descriptions indicate that the regulators are for use with LiIO packs ONLY. SO, what do I need to buy here? I have two 6V 1500mAh NiMH packs that I want to run in parallel. I need a step-down for the tail rotor servo/gyro. Can I buy just the step-down from Align or Duralite? Do I need to couple the step-down with a 6V regulator? What regulators are out there designed to work with 5-cell NiMH Packs?
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Old 09-12-2007, 08:40 AM
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Default RE: .50 size heli servos

Correct, a 5 cell pack will in general be higher voltage than 6V, even when not fully charged. You may not need to regultate anything besides the tail servo/gyro. I've heard of some regulators out there that are simply for 2 channels (tail servo and gyro gain), I'm not sure who all has them, but I believe Align may have one and possibly some other companies as well.
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Old 09-12-2007, 08:46 AM
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Default RE: .50 size heli servos

Yes you can buy the Align voltage stepdown separate Align part#K10333A
http://grandrc.com/inc/sdetail/60060

but this is a .9 volt drop, not a regulator. so if your NiMH pack drops to a lower voltage and then you cut .9V off from the tail you could potentially run into a low voltage reboot of your gyro. I run this between the gyro and the tail servo which would at least minimize this risk.

You may want to consider running a lipo anyway. Align has a really nifty device which gives you a 2S lipo, a voltage regulator for the flight servos and an on board glow lighter for less than $60
http://grandrc.com/inc/sdetail/88836

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Old 09-12-2007, 08:54 AM
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Default RE: .50 size heli servos

That isn't the item I was referring to from Align, they have a 2 input/output regulator, or have one coming.

http://www.horizonhobby.com/Products...dID=AGNHE50H05

Other similar devices are available as well.
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Old 09-12-2007, 09:39 AM
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Default RE: .50 size heli servos

Here you go: http://www.gravesrc.com/ProductDetai...50H05&CartID=1

Chad
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