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01-01-2011 12:17 PM

hal001

Re: HV servos

http://www.spektrumrc.com/Products/D...odID=SPMVR5203

This is what i run on my trex550, castle pro bec, and this for tail. Works great. Gyro and servo will be where ya want it.

12-31-2010 08:14 PM

flycrazy = Darcy Creighton

Re: HV servos

Quote:

Originally Posted by moo

The advantage of a HV servo is you can run more power through them.
(Power is voltage squared over resistance)
If you don't run high voltage to a high voltage servo you loose any advantage you just paid for.

I'm with ya, man! I agree 100% and don't dispute that.

I think you're missing what I was trying to say though.... my choice of wording may have been poor as my focus was primarily direced at the gyro and other devices which may not be compatible with high voltage. 6.6v is still high voltage.

Quote:

Originally Posted by Rob

I have been informed that Spectrum AR7100 and the 7100R have a regulator built in to them so you can run 2S lipo to the cyclic servos and then from the Regulated tail and gear channels you can get 5.1 volts for your gyro. Nice Idea for the heli guys out there.

Very cool. Just checking the specs out now ... the way it is worded on the Spektrum site though, it sounds like all channels are regulated to 5.2v / 2A ... I'm going to check it out a little more. I may use the version with the governor in my 3D Plus build.

12-31-2010 06:38 PM

hitechflyer

Re: HV servos

Quote:

Originally Posted by Rob

Interesting, I would check that with a volt meter

12-31-2010 12:33 PM

Rob

Re: HV servos

12-31-2010 12:00 PM

moo

Re: HV servos

Quote:

Originally Posted by Crazy_Canuck

This is exactly why I'm recommending a LiFePo4 RX pack.... under load it drops to 6.6v and stays there until discharged. It eliminates the need for regulators when used with HV servos like the Hyperion DH20X series...

It can also be more deeply discharged than a LiPo and has many other benefits.

12-31-2010 10:53 AM

flycrazy = Darcy Creighton

Re: HV servos

Quote:

Originally Posted by hitechflyer

HV servos don't need a regulator, its the gyro that is in question.

Right... and it was mentioned it would be nice to "get rid of all these regulators". Running a LiFePo4 pack that is 6.6v shouldn't fry the gyro, rx, and most HV servos can be run up to 8v without harm.

6.6v is a lot easier to fudge than 8.4v on a LiPo. If you need to drop voltage a little more, then do away with the regulator and put a 1N400X diode in-line to drop the voltage to about 0.7v (yielding approx 5.9v to the device).

12-31-2010 05:58 AM

hitechflyer

Re: HV servos

Quote:

Originally Posted by Crazy_Canuck

HV servos don't need a regulator, its the gyro that is in question.

12-30-2010 11:09 PM

flycrazy = Darcy Creighton

Re: HV servos

Quote:

Originally Posted by hitechflyer

these small inline regulators will only knock down 1 volt. so if your starting at 8.4 your only down to 7.4 volts.

It would be nice to get rid of all these regulators. Lipos are becoming the chose now a days.

12-30-2010 05:50 PM

hitechflyer

Re: HV servos

Keep in mind a fully charged lipo. is

8.4

volts , The new high voltage servos will work on 6 volts, if you get a good deal on them I would buy them.

The 2.4 receivers will handle 9 volts. the gyro i'm not sure. normaly the high speed tail servos are good for 5.1 witch use the small inline regulator stepping down 6 volts. these small inline regulators will only knock down 1 volt. so if your starting at 8.4 your only down to 7.4 volts.

It would be nice to get rid of all these regulators. Lipos are becoming the chose now a days.

12-30-2010 01:47 PM

flycrazy = Darcy Creighton

Re: HV servos

I'll be installing HV servos into my Compass 3D Plus build. I'll be posting the build on here if you care to follow. HV servos are best suited to nitro.

If your TRex 600 is nitro, I would suggest a LifePO4 6.6v pack for your RX/Servo power.

If your TRex 600 is electric, I would suggest going with normal voltage servos. A lot of the standard low voltage servos are crazy fast and well established.

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