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NX4 Discussion and support of the Gaui NX4 Nitro Helicopter


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Old 11-19-2012, 06:12 PM   #1
crickr1
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Default First Nitro!

Hey guys,
Getting ready to order my first nitro and th x4n is it! Been following some of the threads, seems to be what I'm looking for. With little daylight at end of day, when I get home don't have time to charge so nitro it is!
Going to get the os37, savox servos, MSH Brain, and Futaba s-bus.
Looking at the Gryphon auto booster remote, some recommend the Switch glo pro,
Input appreciated
Also considering Life packs instead of lipo, so I can leave charged and have a flight ready heli. Pro's, con's?
Is the stock Gaui pipe good or should I get other?
Any other input would be great!
BTW, I'm not doing any hard 3d yet, Just started w/loops/flips but I do like to push my ability and am looking to do more as my ability advances.
Thanks for input
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Old 11-19-2012, 06:36 PM   #2
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The gaui pipe should work great. That is what I have ordered. Also going to use the switch glo and life packs.
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Old 11-20-2012, 12:14 AM   #3
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Quote:
Originally Posted by crickr1 View Post
Hey guys,
Getting ready to order my first nitro and th x4n is it! Been following some of the threads, seems to be what I'm looking for. With little daylight at end of day, when I get home don't have time to charge so nitro it is!
Going to get the os37, savox servos, MSH Brain, and Futaba s-bus.
Looking at the Gryphon auto booster remote, some recommend the Switch glo pro,
Input appreciated
Also considering Life packs instead of lipo, so I can leave charged and have a flight ready heli. Pro's, con's?
Is the stock Gaui pipe good or should I get other?
Any other input would be great!
BTW, I'm not doing any hard 3d yet, Just started w/loops/flips but I do like to push my ability and am looking to do more as my ability advances.
Thanks for input
So excited for you!! I still love nitro and the NX4 is a good choice. I am using the Pushglo the little brother of the switch glow. It is neat to be able to heat the plug using the radio but since we don't have an autostart you are still going to have to go to the chopper and crank over the engine. You can save space, weight, and cost and get the Pushglo. Either is better than having to carry around a glow driver !

I use 2s lipo and keep it charged with a CC 10 amp BEC. Batteries are cheap enough to replace each year.

I can't imagine the Gaui pipe won't be nice.

Good stuff!
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Old 11-20-2012, 09:28 AM   #4
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This package has the gaui pipe, saddle tank, gaui gov and gaui on board push glow.... at a pretty decent price. dealers should have them soon....

http://www.empirerc.com/gaui-nx4-fue...ck-p-6749.html
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Old 11-20-2012, 09:30 AM   #5
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JC has been running the Gaui pipe since IRCHA and has been very happy with it.... He has had great success on both 15% and 30% nitro....
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Old 11-21-2012, 08:06 PM   #6
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Just ordered! Exp rc 13.5% off coupon! Oh Yeah Baby!!! Can't wait,,,I'll be following threads till then.
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Old 11-21-2012, 08:14 PM   #7
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What size life batts everyone using? about how many flights per charge?
Thanks
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Old 11-21-2012, 08:45 PM   #8
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mine is a 1350mah hyperion. I get about six flights per charge.
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Old 11-27-2012, 10:18 AM   #9
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I just finished my first nitro build and I love it. You will too!!
The MSH Brain is awesome on a nitro too.

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Old 11-27-2012, 11:01 AM   #10
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How are you guys running these small packs. I am using a 2250mah lipo and my nix is still tail heavy
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Old 11-27-2012, 01:57 PM   #11
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Quote:
Originally Posted by Chris Lalonde View Post
How are you guys running these small packs. I am using a 2250mah lipo and my nix is still tail heavy
Yes, it is a fat pig of a tail. Nothing you can do about it. Just let the FBL controller level it out for you. I put in a Scorpion backup guard up front and my battery is on the front piece and it is still very tail heavy. Oh well...flies great so I'm not worried about it.
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Old 11-27-2012, 07:36 PM   #12
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I read about them being tail heavy so I picked up a 2000 life, sounds like could have been bigger. Just starting the build so we'll see!
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Old 11-27-2012, 09:16 PM   #13
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Will a 2000mah fit under the canopy.
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Old 11-28-2012, 08:25 AM   #14
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Quote:
Originally Posted by joallen001 View Post
Will a 2000mah fit under the canopy.
I just built frame so far, strapped batt to lower front batt tray and put canopy on. just fits.
Dimensions of my batt are
90mm x 42mm x 15mm ( this works)
going to look for a more narrow, but could be taller, pack w more mah,
Something the size of a 2200 lipo might be good fit , havent tried yet.

This looks like a better fit
http://www.readyheli.com/HP-FR21002S...k_p_33833.html
The extra length is ok
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hybrid Gaz/otos fblstretched 6s Mini PRÔTOS. Stretched PRÔTOS.500,EC135 Era/PRÔTOS.500
,GOBLIN 630 Comp, ,PRÔTOS MAX!
Synergy E5 /E5S all MSH-Brain/Futaba8FG

Last edited by crickr1; 11-28-2012 at 08:28 AM.. Reason: added info
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Old 12-12-2012, 09:38 PM   #15
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Servo question??
Using Savox 1250mg, they came supplied with rubber grommets, should I use grommets or mount rigid?
Thanks
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Old 12-12-2012, 10:25 PM   #16
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Quote:
Originally Posted by crickr1 View Post
Servo question??
Using Savox 1250mg, they came supplied with rubber grommets, should I use grommets or mount rigid?
Thanks
Use the grommets. It'll make your life easier, since the kit supplied longer servo screws. The grommets will offset that thickness, plus they're good for vibration dampening anyway.
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Old 12-12-2012, 10:35 PM   #17
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Thank you Caralamar
Just got my servos and braided the lines, getting them ready for install.
Planning maiden after Christmas
already have cnc x5 boom support mount and the Lynx 600 fan is on way.
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Old 12-12-2012, 10:59 PM   #18
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Quote:
Originally Posted by crickr1 View Post
Thank you Caralamar
Just got my servos and braided the lines, getting them ready for install.
Planning maiden after Christmas
already have cnc x5 boom support mount and the Lynx 600 fan is on way.
Sweet! Good luck with the build bud! While you have a pristine canopy, use some fiberglass cloth and epoxy or whatever other method you prefer and re-enforce the grommet holes...its a tight fit and that area of the canopy is weak.

Also, I found that the QuickUK needle adjusting levers are great. They allow me to visually see exactly where the needle is and I can quickly set it a click or two and see the new position.

DO THROW AWAY the stock fuel lines. They are not good, especially the clunk one. I think even Bobby mentioned this in his video. I built mine before there was a video, and used the stock clunk line and it started bubbling up on me after just a few flights.

Check your swashplate bearing retaining screws...most apparently have no loctite on them.

Oh, when you mount your engine, leave all bolts loose and "wiggle" the engine a bit until you can freely turn the starter shaft clockwise by hand. Once you get it there, slowly start tightening your bolts in an alternate pattern and re-check the starter shaft. Took me a while to get it loose but it will get there!

On the engine pipe, you can get an aftermarket RJX deflector cheap. They are great because they have a plug so you don't get dirty fuel all over your car.

Let me see..what else... oh, the tail boom... you can use a piece of saran wrap plastic or thin thermal receipt paper and stick it between the front gears and push the boom in tight against that paper. Level your vertical fin and then slowly tighten just one of the bolts. Remove the paper and check the mesh. You should be able to "wiggle" the tail gears a little and feel it "clicking" in the front just a hair. Once satisfied, tighten the other clamp and finally put in the top bolt to pin the boom.

If I think of anything else, I'll let you know. The most PITA parts of the build are the rubber grommets on the tank fences and the rubber grommet that goes into the tank. Use some rubber-safe grease and work it in. I replaced the plastic fuel nipple with a metal one... I have broken a few of the plastic ones and I prefer the metal ones.

USE A HEADER TANK

Ok, that's it...good night buddy!
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Old 12-13-2012, 06:40 AM   #19
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,GOBLIN 630 Comp, ,PRÔTOS MAX!
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Old 12-27-2012, 08:55 AM   #20
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Alright, have my motor now and finishing the build.
Few more questions;
I'm running a header tank, also picked up a "bubbleless" clunk.
should I use this in the main tank and the metal klunk (came with quick uk header) in the header?
Also, I have Lynx cnc fan, Do I ca glue or epoxy magnets to it?
On my th servo,,I have the linkage as small as I can make it(about 84mm) and the manual says 81mm. The servo arm and th arm are not perfectly aligned, off by a couple degrees.
Will this be ok or should I shorten the linkage rod?

Thanks guys can't wait!
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