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HomeAircraftHelicopterGaui NX4 NX7Gaui NX4 › What battery options do I have for NX4 with GAUI HV servos
02-24-2013 05:04 PM  5 years agoPost 1
HeliNutAndy

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worcester, MA USA

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What kind of battery can I use to power my receiver and servos? I am using the GAUI mini vbar, GAUI GUEC GS-303 HV Brushless Digital Servos with two satellite receivers. Would I be able to use a 2s Lipo? Would some type of Life pack be a better choice?

TIA,
Andy

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02-24-2013 05:08 PM  5 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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I used a 7.4 1900 lipo.

Bill Whittaker

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02-24-2013 06:11 PM  5 years agoPost 3
HeliNutAndy

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worcester, MA USA

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Thx wrongler.

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02-24-2013 08:18 PM  5 years agoPost 4
jczankl

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AZ

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Depends on the size of the pack. It's very narrow frame and Canopy. So you just have to make sure that the canopy will fit, I use a LiFe 1450 2s Unregulated. Lipos that should fit 13-1800 ;-) But as Wrongler says some you might be able to find a narrow 19-2200mah pack.

The Model is slightly tail heavy as it is. So if you can find the biggest pack to put up front it might help.

GAUI/Empire
Xpert Servos
PowerMaster Fuels
YS Engines
Graupner
Castle Creations
Scorpion Motor
VTX Blades

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02-25-2013 12:23 PM  5 years agoPost 5
HeliNutAndy

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worcester, MA USA

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Thank you. I was wondering if I needed some type of regulator. I will measure the frame etc. and go from there.

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02-25-2013 10:48 PM  5 years agoPost 6
crashheli

rrApprentice

naugatuck C.T U.S

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pulse 2250s fit nice

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02-26-2013 04:51 AM  5 years agoPost 7
Glenn Goodlett

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California

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I'm using a TP 1350 Lipo.

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02-26-2013 02:14 PM  5 years agoPost 8
HeliNutAndy

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worcester, MA USA

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How many flights per receiver pack are you guys getting? This is my first nitro and I am not used to running a separate pack. I'd like to make sure I get enough packs.

Also, what percentage nitro would be the best choice for this motor?

Do I need to do anything special in regards to the V-bar for the initial flight or is it basically plug and play?

I'm hoping to finish the build this week. I had to order the following which should make it to my house today to complete the heli.

GAUI NX4 AUXILIARY FUEL TANK SET(60CC 2.1OZ)
GAUI NX4 GAUI AUTOMATIC GLOW STARTER
GAUI 30 CLASS MUFFLER
GAUI NX4 ENGINE GOVERNOR

I purchased the OS motor but I should have gotten the GAUI branded one just to be consistent with using mostly all Gaui parts. I realize it's the same motor just with different branding etc.

I apologize for all of the questions I just did not want to start separate threads for each one.

-Andy

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02-26-2013 05:37 PM  5 years agoPost 9
jeancaban

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Toa Alta, PR

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I use Turnigy Nanothech 1300mah 7.4v. Small and light weight, which is what this heli is about.

Purchased 3 of these, charge them all and enough flights for all day.

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02-26-2013 05:43 PM  5 years agoPost 10
jeancaban

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Toa Alta, PR

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Many NX4 owners use LiFe packs, but I don't feel confident running my servos higher than 6.0v, eventually they could fail. But if you are running high voltage (HV) servos, it shouldn't be a problem.

The benefits of the LiFe over LiPo, is that people avoid running regulators, which is a more simple setup. Receivers don't have problems running 7.4v (8.4v fully charged).

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02-26-2013 06:07 PM  5 years agoPost 11
HeliNutAndy

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worcester, MA USA

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I am using HV servos so I would like to run the highest voltage possible. I also do not want to use a regulator. It seems like extra equipment that's not needed in my case. If the Mini-vbar and satellites can handle a 2s that's the route I am going to go. The servos can handle a max of 8.4 volts loaded. I'm not sure what loaded means...

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02-26-2013 06:50 PM  5 years agoPost 12
jeancaban

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Toa Alta, PR

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A 2s lipo (1s=3.7 volts, so 2s = 3.7v + 3.7v=7.4v) fully charged runs at 8.4v, this is what loaded means.

In your case, if you are running high voltage servos, a lipo or a life will work fine. Life batteries runs full at 7.2v but drops fast to a steady 6.6v. The inconvenient thing about this batteries is that you cant monitor a loss in voltage after 6.6v until they are almost fully consumed. However with Lipos you can monitor after every flight the voltage loss and avoid and any sudden low battery events.

In your case, go with a 2s lipo, in other words 7.4v. Remember, flying below 7.4v may be safety hazard due to low battery charge. My recommendation is to fly between 8.4v and 7.4v, just to be safe.

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02-26-2013 07:03 PM  5 years agoPost 13
HeliNutAndy

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worcester, MA USA

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In your case, go with a 2s lipo, in other words 7.4v. Remember, flying below 7.4v may be safety hazard due to low battery charge. My recommendation is to fly between 8.4v and 7.4v, just to be safe.
What do you mean by this?

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02-27-2013 11:49 AM  5 years agoPost 14
jeancaban

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Toa Alta, PR

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The voltage of a 2s lipo "safely" to fly would be in that range, 8.4v and 7.4v, depending on your heli and current setup.

This website was very useful for me.

http://www.rchelicopterfun.com/rc-lipo-batteries.html

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03-10-2013 02:55 PM  5 years agoPost 15
HeliNutAndy

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worcester, MA USA

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I ended up getting a few of these:

Duratrax LiPo 2S 7.4V 1800mAh 30C 1/16 1/18 Hard Case Mini

I like the hard case and they fit perfectly. I also like the female bullet connectors that are built in. Here is a link if anyone is interested:

http://www.amazon.com/Duratrax-LiPo...d/dp/B0030GVVE0

They are a bit pricey for those worried about the price.

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03-10-2013 06:53 PM  5 years agoPost 16
blade3d

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New Jersey USA

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With the hard case does it get a little heavier ?

Blade3d

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03-10-2013 07:29 PM  5 years agoPost 17
HeliNutAndy

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worcester, MA USA

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With the hard case does it get a little heavier ?
I imagine it does a little bit but I don't usually worry too much about a little extra weight. I just make sure not to go over board

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03-10-2013 10:52 PM  5 years agoPost 18
blade3d

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New Jersey USA

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OK cool

Blade3d

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