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NX4 Discussion and support of the Gaui NX4 Nitro Helicopter |
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06-07-2013, 12:41 PM | #21 (permalink) | |
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06-07-2013, 04:28 PM | #22 (permalink) |
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This looks like it may work? Although it says blade root reducer, it has brass sleeves in it.
http://www.robsrchelispares.co.uk/PB...?ItmID=9492211 I can't believe how hard it is to find blade bolt reducers.
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06-07-2013, 05:30 PM | #23 (permalink) |
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I just got home and did some quick measurements on the X5 and the NX4 grips. As far as I can tell, the X5 grips will bolt right on and the spacing is identical between the two sets as far as link rods, etc. I'm going to hit the local hobby places this weekend and see if I can find some brass tubing. I also have a friend who just so happens to have a spare set of blades for his Goblin 500, so I'll borrow those as well. Now I just need the full length torque tube for the X5 and I should have everything I need to try 500mm blades on this guy.
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06-07-2013, 07:15 PM | #24 (permalink) |
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The brass sleeves that come with EDGE 523 blades are almost exactly what you would need, they are a couple mm to long is the only thing, but could easily be cut with a dremel to the right length. they are 4mm outside dia. 3mm inside. I am sure there is a source somewhere out there, I have not really looked though.
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06-08-2013, 09:06 AM | #25 (permalink) | |
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Think the NX4 will have issues swinging 500mm blades at 2700RPM? Doesn't look like there is an option to go down a pinion to lower headspeed for optimal motor RPM's.
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06-08-2013, 05:09 PM | #26 (permalink) | |
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If you do try it, I am very interested in the results... Let us know how it goes...
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06-09-2013, 01:03 AM | #27 (permalink) |
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Interesting you guys want to use the sab 500mm I was using them on my goblin 500 and hated them I now use edge 473 and I find it flies way better just increased the headspeed a little to get the same pop but they track way better. The I had to tap out the brass sleeve in the edge 473 for the bolt to fit in.
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06-09-2013, 06:18 AM | #28 (permalink) | |
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06-09-2013, 05:31 PM | #29 (permalink) | |
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Location: Ft Myers Fl
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06-09-2013, 05:56 PM | #30 (permalink) |
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She had a great builder!
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06-09-2013, 09:52 PM | #31 (permalink) |
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How concerned should I be about balance going forward with this project? Right now, the SK540 seems to be handling the imbalance very well, I notice no negative tendencies in flight, piro's are flat and consistent, but that's no reason to completely ignore balance and just slap a bunch of extra weight on the tail.
Running some pretty heavy stuff up front with the 2600mah Duralite sentinel pack (110g) and regulator (50g or so). Not sure how much bigger I could go with an RX pack, surely not enough to make up the difference. Just a peek around Google didn't reveal any carbon fiber booms for the X5. Just a couple of weight saving ideas for the stretched tail: - Is the weight difference between the silver tail supports and carbon tail supports significant? - Would the old style tail casing be a bit lighter than the "single piece" style? - Carbon pushrod ( from Goblin 630 ) vs. stock - Tail blades, runnin stock gaui carbon's, are there lighter options? - Tail fin, the lynx vertical fin looks lighter? I'll nix the horizontal stab. as well. Just tossing out ideas that pop in my head while I count down to my next parts order (Friday!).
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06-12-2013, 06:11 AM | #32 (permalink) |
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Older style tail is little lighter, my belt conversion is also lighter, no added bearings/gears.
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06-12-2013, 07:31 AM | #33 (permalink) |
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I may swap them around. My X5 has the old style tail and is a bit nose-heavy with 12s packs.
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06-17-2013, 02:28 PM | #34 (permalink) |
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Mostly done! Waiting on the epoxy to cure on the new carbon tail control rod (cut down Goblin 630 carbon rod).
Looks like a Nitro X5! Now I'm just debating running larger tail blades, or wondering if they are even needed. I have some spare 82mm KBDD's layin around.
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06-17-2013, 05:40 PM | #35 (permalink) |
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So you went with, x5 grips, Gob 500 blades and old style tail?
Looks pretty good, waiting on flight report........ Did you use Life? How's the CG?
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06-17-2013, 05:54 PM | #36 (permalink) | |
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CG? What's CG, lol! SK540 takes care of the CG for me, piro's are flat and stable.
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06-17-2013, 08:48 PM | #37 (permalink) |
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So the x5 grips fit.If so i am putting 500mm blades on my x4II.
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06-17-2013, 09:13 PM | #38 (permalink) |
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NX4 and X4 II head is EXACTLY the same, only sold in different package with dif. part number.
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06-17-2013, 09:33 PM | #39 (permalink) |
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I can't imagine any way to get the CG right with any stretched version of this heli without adding tons of dead weight to the front. She's extremely tail heavy in this setup, so we'll see how she flies.
The 2 minute test flight in my front yard earlier didn't reveal any negative tendencies as a result of the CG (that I could tell). We'll see when I can get out to the field and fly a bit bigger and faster and get some video.
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06-18-2013, 01:42 PM | #40 (permalink) | |
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AnythingHeli.com OWNER/ TEAM PILOT GAUI X5 / X7 * GOBLIN G380/R420/G500-x2/R580/G650/R700/G770 (and many others)* Swinging Rotortech Blades * OMP M1 & M2 * MSH Brain * * iX12* |
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