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Gaui
Gaui X7 › Advice on new build
11-13-2014 04:34 PM  3 years agoPost 1
outkast1779

rrApprentice

phoenix AZ

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Hey guys, looking for some input on a new X7 build. This will be my first large ELECTRIC heli. Will be practicing mild 3D and I do not need the absolute smack down best equipment. I’m OK with mid to high end components. So here’s what I’m faced with:

- Currently already have the HKIII 4035-500kv motor
- Will be using the Beast X Flybarless system
- Will use MKS HV servos. However I’m not clear on how much torque is necessary for the cyclic, 200 oz? The HBL665 looks like a good fit at 211 oz/in @ .1 speed? On a side note, brushless or coreless servos??
- Tail servo torque/speed recommendation.
- Kontronik ESC because I can’t think of a ESC in between this and a Castle quality wise. Need to know how many amps I’ll be pulling running a 12S setup. 120?

Thanks guys.

Fret for your pilot...

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11-13-2014 05:19 PM  3 years agoPost 2
S76 Mech

rrElite Veteran

Hatboro, Pa.

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Your equipment list looks fine.
- A 120amp esc is also fine for mild 3d. YGE is a good in-between from Kontronic and Castle, although I must say I've had great success with my Castle Edge 160HV.
- MKS make some really good brushless servos, you should have no issues with those cyclic servos though I've never run them.
- As far as the tail servo spare no expense. This is an area where you truly get what you pay for in my opinion. I've had good experiences with the Futaba HV brushless servos (276hv) and the newer SV servos as well.
-BeastX will work fine but does not offer a Governor. So keep this in mind when you select which Esc your going to run. Can't go wrong with Kontronic in this area.
- Also, are you going to run a separate rx pack? If you are (recommended on a 700 over a BEC) you'll have to choose either a 2S pack for HV servos, or life pack for Non-HV servos.

If you have any build questions shout em out and I'll be happy to help.

PS: pay particular attention to your torque tube bearing placement, it will save you some grief in the end.

Rick C.

Gaui Greatness X7, X5, NX4, X3

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11-13-2014 05:31 PM  3 years agoPost 3
outkast1779

rrApprentice

phoenix AZ

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Ok, great! Thanks for your reply. I was just thinking about that ESC yesterday but I couldn't find enough supporting documentation so I dismissed the idea. I'll definitely reconsider as the pricing is much better.
Does MKS make a sufficient tail servo?

Fret for your pilot...

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11-13-2014 05:33 PM  3 years agoPost 4
S76 Mech

rrElite Veteran

Hatboro, Pa.

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Btw, Congrats on your new X7! Wait till you get the grin...

Gaui Greatness X7, X5, NX4, X3

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11-13-2014 05:35 PM  3 years agoPost 5
outkast1779

rrApprentice

phoenix AZ

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Planning on running HV servos all around.
Governor? On an electric?? How important is this since we're not dealing with mechanical drag.

Fret for your pilot...

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11-13-2014 05:38 PM  3 years agoPost 6
S76 Mech

rrElite Veteran

Hatboro, Pa.

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Governor is a MUST in my opinion. You'll get a more consistent flight, times, and power.

The MKS HBL990 is an outstanding option if your going all MKS.

Gaui Greatness X7, X5, NX4, X3

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11-21-2014 05:18 PM  3 years agoPost 7
outkast1779

rrApprentice

phoenix AZ

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Ok guys, final stretch. Just waiting on someone to post a HBL980HV servo for sale. YGE ESC is on the way, ESC programmer on the way. Still need blades. Curtis Youngblood seem to be the way to go. What length shall I run for mild big air 3D?

Fret for your pilot...

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11-22-2014 04:51 PM  3 years agoPost 8
S76 Mech

rrElite Veteran

Hatboro, Pa.

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700mm and above is what you'll need for big air 3D. I personally have run spin, rails and edge on my X7. I like the Edge the best. Either way, blades are always a user preference. Tail blades and rpm are what you really want to pay attention to. Certain tail blades and higher headspeeds 2300+ will result in a vibration and resonance hum. Again, here is where I had good luck with Edge blades.

Either way,congrats. Sounds like your X7 build is moving along nicely . Post some pics of your progress.

Gaui Greatness X7, X5, NX4, X3

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11-23-2014 12:34 AM  3 years agoPost 9
outkast1779

rrApprentice

phoenix AZ

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nevermind, 690mm should do.

Edit: Oh, just saw your post about the 700mm. I will try out the Edge blades but I was told today 690mm will fit my flying style. I usually fly Curtis Youngblood but open to change.

Fret for your pilot...

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12-16-2014 03:44 PM  3 years agoPost 10
outkast1779

rrApprentice

phoenix AZ

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Ok guys reaching the final stages. Just trying to position all of the electronics. What size lipos do you guys suggest for the electronics? 1500 MAH?

Fret for your pilot...

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12-17-2014 04:10 PM  3 years agoPost 11
topekadave

rrApprentice

topeka ks

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2000 or better

------

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12-17-2014 06:11 PM  3 years agoPost 12
rcflyerheli

rrKey Veteran

Granbury, TX USA

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I've been running 1300s on my X7 with Savox 2271/2272 cyclics and tail. I do two flights and swap them out. I haven't ever come down bleow 3.75v/cell, and usually 3.85/3.86.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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12-18-2014 02:23 AM  3 years agoPost 13
outkast1779

rrApprentice

phoenix AZ

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OK, thanks for the input guys.
I went ahead and ordered a Thunder Power 2100 mah Lipo. Only weighs 107 grams, not much for the extra safety margin.
Now I just need to build a EC5 to (3) JR connectors so I have 3 points of power going into the Microbeast for the HV servos.
Halo Blades in the mail.

I can't wait

Fret for your pilot...

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12-18-2014 02:33 AM  3 years agoPost 14
outkast1779

rrApprentice

phoenix AZ

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PICS
Here are a couple pics. The tail is complete, I just left it off for ease of build.
Still placing electronics. Looking for some attractive wire looming.

Fret for your pilot...

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12-18-2014 04:32 AM  3 years agoPost 15
rcflyerheli

rrKey Veteran

Granbury, TX USA

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Looking great. You will probably get tired of the small pinned canopy mounts in the back. Booya now makes a set with the correct standoffs for the formula canopy. Makes putting it on a breeze.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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12-18-2014 05:25 AM  3 years agoPost 16
outkast1779

rrApprentice

phoenix AZ

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Ah, ok perfect. Thanks. Heading over to order right now

Fret for your pilot...

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12-18-2014 06:46 PM  3 years agoPost 17
outkast1779

rrApprentice

phoenix AZ

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So this has been bugging me all day. The servo horns that come with the MKS servos are thick. If I were to thread the Gaui kit provided linkage ball in the servo horn, there would be no threads available on the backside of the horn to put on the nut. Are you guys just threading the linkage ball into the plastic horn then adding epoxy to the threads?
Is there a Secraft arm and 4.8MM linkage ball available for this project? It makes me kind of nervous when I can’t secure the ball with a nut on the back.
Thanks.

Fret for your pilot...

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01-04-2015 08:43 AM  3 years agoPost 18
Side_Effects

rrApprentice

fort lee nj

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Just a heads up I believe the beast x now has a gov though a firmware update. Check here to confirm.
http://www.spektrumrc.com/ProdInfo/...ware_Update.pdf

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