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HomeAircraftHelicopterSynergy R/COther › SYNERGY N-9 PRELIMINARY BUILD-UP REVIEW
03-07-2008 02:37 PM  10 years agoPost 1
kyoshokamper

rrApprentice

HOUSTON, TX, U.S.A.

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WELCOME TO RHODES’ R/C HELI SERVICES

SYNERGY N-9 PRELIMINARY BUILD-UP REVIEW

The build went well and the parts count was very accurate with nothing missing whatsoever. I was quite pleased with the large 5MM fly bar smartly outfitted with accurately machined flat spots similar to Thunder Tiger products. This Synergy N9 model is quite an achievement for a manufacturer entering a very competitive and technical market with a 90 class 3D machine of this caliber. She was built with the latest YS91SR long stroke red head, GY611, MAH 700MM x 14MM CF mains, FROMECO 5200MAH Li-ion 2S2P 7.4V and ARIZONA regulator, SWITCHGLOW onboard glow device, 4 super hot x JR DS-8717 servos, Curtis MP9, Curtis CF paddles, MA 6MM x 6MM start shaft adaptor and a short list of authorized HYPERFORMANCE upgrades thusly: torque tube, metal fan hub, metal mixing base complete with metal ball raced arms, metal anti rotation bracket & CF frame set. She was outfitted with a blue metal bracketed K&S header tank and Century CN2286 3-N-1 blue matching T-filter system.

I found several items of concern during the build thusly:

1. after market CF frames were mis drilled ( too small ) at the boom support attachment holes, the elevator pivot point and the rear canopy anchor pin points
2. after market CF frame set included 3 CF servo stiffener bars that were wholly unusable in that they were drilled far off from center and beyond correction
3. OEM servo stiffener bars were also not accurately drilled and required extensive reworking with a drill and Dremel to make them usable. It appears that Synergy attempted to make one set of bars to fit all applications of the big 3+1 servo manufacturers i.e. Futaba, JR, Airtronics + Hitec. This is not possible as acknowledged by MA in their production of specialized servo stiffener bars by application.
4. OEM hardware for the 2 outside cyclic servos fell short of the length required when used with the compulsory spacers. The builder is compelled to obtain longer ones.
5. Weird clips supplied for use on both the mixing arm pins and yoke pins for the tail pitch fork are impossible to install and absolutely foreign to me. They are not c-clips and there is no groove for them and as far as I can tell no way to grasp them and force them onto any shaft. Go figure them out and let us know as I have never seen such a fastener anywhere in the world.
6. Installation of header tank and filter hold was a challenge due to the extremely narrow frame design. I employed a white plastic Thunder Tiger frame stiffener just slightly abbreviated to keep the header tank just off of contact with the main and replaced the 3x10MM forward pivot anchor screw for the rudder intermediate bell crank with a 3x18MM such that the fasteners left a 'SMART' gap in the plastic standoff for anticipatory failure during mishap and vibration dampening thus hopefully sparing the frames that unnecessary break simply because of the header tank standoff. I found the YS' crankcase cover the most logical place to anchor the 3-N-1 filter holder after drilling out for that special 3.5MM screw in place there.
7. I found that all of ball link ends were the worse thing about the kit physically in that they are far far far too tight to be commercially acceptable and each and every one absolutely required extensive sizing to achieve any practical result. This should be Synergy's next kit modification as it dramatically increases the labor and is quite irritating especially at this level of kit building. I found my standard ball link pliers and other link devises unusable with the Synergy's ball links. Also quite unnecessary and irritating at this level of kit building. I might find these new links acceptable if they were more closely fit such that purchase of a fitment devise was not compulsory and if the money spent there was spent on a new specialized ball link plier and some new inserts for my link measuring device. Even my KS ball link turner didn't fit!
8. Most instructions were adequate except for the length of the final 3 cyclic links just below the swash plate. I found that both the OEM & the aftermarket HYPER units were dangerously beneath acceptable grasp of the timing pins from the head requiring that the swash plate be raised about 4 turns all the way around to be safe and yet without bumping the top of the travel limits. I prefer more accurate center to center of ball measurements for perfecting links but all were omitted but just as well because my link measuring devise would not have worked anyway. These are just some of the compatibility problems that occur when a manufacture steps outside of the industry standard.
9. Fuel tank and hardware is very well made and seals well but the pictured angled vent was replaced with a straight one. Things like that tend to irritate high end buyers because they buy for the details and tend to be disappointed when something is not what it should be or substitutions are made for less expensive ones without explanation or reason.
10. The canopy system is the best in the business that I have seen yet. The canopy sports a thick thorough gel coating and sealant on the interior. The grummet and thumb screw system fits extremely well if you simply cut the middle of the indicated areas. Very narrow, rattle free, tight fitting, really good job!
The lack of set up instructions did not bother me at all probably because I knew that I could take it from there. This is not a kit for a beginner or a new builder whatsoever. I believe that Synergy has done a good job over all but should address the following:

• remedy the ball link end fitments issue ASAP, market a set of premium ball link pliers and inserts for measuring link devices for their product, or return to standard
• remedy the hardware issues with longer fasteners for AIL & COL servos on spacers
• remedy the hardware issues with conventional fasteners and grooved pins or equivalent on tail yokes and mixing arms
• supply a swash plate leveling device specifically for the N9 that accurately locates & levels the swash plate making adjustment of the control system true
• add accurate ball center to center link building dimensions to instructions & reprint manual with all updates included
• remove the pictorial of the angled tank vent or supply it as pictured
• supply a variety of servo supports for the big 3 + 1 i.e. JR, FUTABA, AIRTRONICS & HITEC because the existing ones fit poorly & required drilling to adjust
• ditto for the after market CF servo support set which fit even more poorly than the OEM G-10 set using the new JR DS-8717's, so poorly that I could not use them
• remedy 4 servo tray servo support standoffs because 2 outer cyclic servos fell short of the required height such that I was compelled to shim them level, unfortunately this will require the recasting of that part to correct the short servo support standoffs

Remembering that there is no perfect bird and that Synergy is new to the game, I believe that they have done fairly well with some issues notwithstanding. The remedies are expensive and time consuming but the reward is a blazing fast sharp and crisp flier that is almost as visible at altitude as a JR ERGO 60.

More photos to follow

"I keep my feathers numbered for just such an occasion"- cred, Leghorn Foghorn, est.1946,

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03-07-2008 05:45 PM  10 years agoPost 2
DEFILER

rrApprentice

Houston - USA, Balad - IRAQ, Kuwait - KWI

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Kyoshokamper,
I concur on your observations regarding the e-clip fasteners as well as the ball link sizes. There is a tool made by hyperformance RC which helps a little with sizing but is still inadequate. I had to squeeze the links during sizing to get any results at all and was frustrated by my existing ball link tools not fitting the oversize balls. I have even damaged the chrome coating on one of the swash balls attempting to remove a link.

Ditto on the servo support brackets. Although mine fit fine laterally, I could not tighten them down fully due to some additional height inherent in the 8717's. The next revision kit needs to have these issues addressed in my opinion because it frustrates a relatively new builder such as myself that comes from "build and fly" models such as Align and even Thundertiger. This is truly an advanced model however I believe the issues brought up are potential failure points. (tailrotor pitch fork clips/washout clips and tight ball links)

I haven't flown it yet but I've heard it's a sweet flying machine. I've never been more nervous about flying a new heli than this one for fear of something flying off. Time will tell for sure.

(may I ask who you got the carbon frames from? I have a set which I got from QuickUK but haven't installed them since they arrived a week after I began my build and it was too late)

Chris

I only crash due to random planetary intervention

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03-07-2008 06:10 PM  10 years agoPost 3
kyoshokamper

rrApprentice

HOUSTON, TX, U.S.A.

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CARBON FRAOME SOURCE
My client purchased them from Ron's Heliproz South here:

http://www.ronlund.com/Merchant2/me..._Code=SY200-310

They are nice enough frames but have 4 mis drill errors and mis aligned servo supports as mentioned in my post. These frames are quite pricey @ over $ 350 a copy and as such should be perfect at that price. If you look closely at the pic wherein I used an abbreviated tongue depressor to create a flat vertical mount for the AR6000's satellite RX, you will see the CF shims that I cut from the useless CF servo supports supplied in the aforementioned CF frame part # SY300-210. Look really closely guy and you will see the CF shims between the OEM part and the top of the servo frames on the outside servos. Have you checked the 8717's height from the bottom of the mount to the top of the output shaft? I doubt if there is any difference there. Usually if differences occur in standard sized servos, it will be isolated to the lower portion and not affect the critical business end so to speak. You might want to mic those for comparison.

Just in case you did not know; under no circumstances should you continue or attempt to even test fly until those servo supports are secure. You will need 8 pieces of longer hardware to do that with the outside cyclic servos that are atop thick spacers. They simply won't be secure given the hardware in the kit. Be careful and measure it out instead of believing me and you will find that the OEM fastener contact area is wholly inadequate on those 2 servos.

"I keep my feathers numbered for just such an occasion"- cred, Leghorn Foghorn, est.1946,

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03-07-2008 06:22 PM  10 years agoPost 4
DEFILER

rrApprentice

Houston - USA, Balad - IRAQ, Kuwait - KWI

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I have replaced the servo attachment screws with longer ones. I replaced every screw that came in the kit actually with hardened ss cap bolts due to reports of weak fasteners included in the kit.

For the price of this machine I actually expected a better building experience to be honest. It looks great now and apparently flies better but I'm not building another one and not sure what I will do if I ever crash this one.

I'm not knocking the machine, but I actually enjoy building the other machines I have. I consider myself a very meticulous builder and try to get everything as perfect as possible and I frustrated myself with this one. I don't know why because I can see certain design features that really stand out and I enjoy the extremely close tolerances of all the parts....but I'm still not comfortable with it...maybe because it was so damn expensive (for me)

I only crash due to random planetary intervention

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03-07-2008 06:37 PM  10 years agoPost 5
kyoshokamper

rrApprentice

HOUSTON, TX, U.S.A.

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GOOD TO HEAR FROM YA !
I can't tell you what your correspondence means to a fellow builder with relatively high standards. I have rejected many many things that I have seen others use and developed simple methods for perfecting the breed. I agree that the Synergy has issues as do all helis but some things are an easy fix for the manufacturer and other issues are easily addressed by the builder. For instance the flat spot needed for the installation of the satellite RX could be anticipated by the manufacturer or I can simply make my own. The mount for the header tank could be anticipated by the manufacturer or I can simply make my own. I think that you would love the CN2286 or CN2286P 3-N-1 T-filter that appears to be the best in the business for he money. Finding a place to mount it was perplexing to me for about 1 hour until it dawned on me to use a crankcase cover bolt! There is nothing wrong with expecting more for your money but this is a very technical hobby and we must keep the manufacturer aware of the issues if we expect resolution. My complete review was sent to Synergy and surely they monitor this forum. I think that they either will or have gotten the point by now. This particular bird still has an issue with an intermittent shake in the tail even after a full case or more of fuel that could be related to the torque tube or the engine tuning, etc. So far it has been difficult to determine which. My bet is that it is related to the engine tuning and occasional 4 stroking. We also seem to have issue with getting the low end set such that she has both a controllable engine kill and does not die during an auto rotation session. It is just like I have always said, there is no such thing as a perfect bird and patience is definitely required. BTW, that freaking Switchglow is really nice as well.

"I keep my feathers numbered for just such an occasion"- cred, Leghorn Foghorn, est.1946,

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