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Synergy R/C Synergy N9 > SY510-315 New center block review and installation
 
 
Rymps
Senior Heliman
Location: Indianapolis and Windsor CO

I recently bought the new Synergy SE center block engine mount. I was thinking that there are questions that people might have before buying this part. I have read questions on forums like: Dose this part really help with fuel foaming? Dose it make the heli stronger? Why is it so expensive? Is it worth the money Will it change any of the flying characteristics of the helicopter? I am hoping to clear the air about some of these questions and give Synergy owners a better understanding of this part.

I have added pics so people can see what the part looks like and how well it is made. The engine block has a nice CNC machining finish and it looks like they tried to get most of the weight out while keeping all the strength and that takes more machining steps. The new mount is easy to install as you do not need to remove the engine. I removed the engine mount bolts to the center block and the fuel tank. With the tank and the fuel tank grommet removed you can slide the old mount out and install the new mount. There is a top and bottom to this part. The new engine mount should have the wider part towards the bottom of the heli. (See pic with mount installed) if you try to install the mount upside down it will be really close to the bevel gear. Also like the other mount you will need to keep the bolt pattern going in the right direction.

Next is the flight test. I had some fuel splashing in my tank before I had this mount. In normal mode my head speed is 1750 and this is when it was the worst. With the new mount in most of this is gone. In idle up 1 I run 1850. I had little splashing before so this RPM did not notice much difference. In Idle up 2 I run 1910. I had some splashing, but not as much as I did in normal mode. The new center block help here and was noticeable. The splashing has been cut down and the block has done its job, but there is more. One thing I should tell you is I am running an OS 91SZ pumped with an MP5. With the block installed there is a new noise. It is a new harmonic noise. This is from the new center block stiffing up the whole frame. After I installed the new mount I worked the frame and you can feel the frames are a little stiffer from flex.

The trade off is weight. My old mount weighs 29 grams. The new center mount weighs 44 grams. This is a 16 gram difference. Not to bad considering the new mount is much longer than the old mount. It is nearly twice the length.

I did not use the new SE side engine mounts as I did not have the money to get these right now. They look good and some day I hope to try these. Maybe there are people out there who have these and would like comment on them and how they work on there N9. This is a nice part to have, and it dose change the heli for the better. Hope this was informative for the people who don’t have this part and maybe thinking of getting it. Thanks Kevin

06-05-2008 09:16 PM
 
 
spdntckt
Heliman
Location: San Jose, CA USA

Very informative. I just bought my new mount and have yet to install it. now i feel motivated! i was thinking i needed to take the engine out of the heli.. i didnt realize i could slide it in while leaving the engine intact.
06-06-2008 10:00 PM
 
 
Bart B
Veteran
Location: Synergy alley

I installed the center and outside mounts in both of my models.
I tried to install the center block upside down and was unsucessful.
For those who have a hard time with screws,be warned,the outside mounts require 4by12 mm cap screws for the OS.
I noticed an immediate difference with the new mounts.In idle up 1,I lowered the rpm to 1825 and the tank was like glass,extremely smooth.A quite worthy upgrade.I havn't tried any higher rpm's yet.
Wondering if the YS guys are going to notice a difference....


....sometimes you're the blade,sometimes you're the bug.
06-06-2008 10:55 PM
 
 
bathmagic
Senior Heliman
Location: Berwick,Victoria, Australia

synergy

I thought the idea of the plastic mount was to NOT transfer the vibration ?

Seems to be incorrect information from your report

Dale

3DMP , Vbar 600 "Innovation" The key to success !
06-07-2008 12:25 AM
HOMEPAGE  
 
 
Rymps
Senior Heliman
Location: Indianapolis and Windsor CO

Quote 
I thought the idea of the plastic mount was to NOT transfer the vibration ?


The mount changes the harminic of the vibration. The plastic mounts are the ones that come with the original kit and they are not the SE mounts. The new center mount is the mount that helps stop fuel foaming by changing the harmonic of the vibration. Thanks
06-07-2008 12:42 AM
 
 
cdrking
Elite Veteran
Location: Seattle

Quote 
I thought the idea of the plastic mount was to NOT transfer the vibration ?
I believe this was the original selling point of the plastic mounts, and cost. Through testing they have determined that the (New) center engine mount AND the (New) engine mount dampens/isolates the vibrations, more so then the plastic engine mounts and the "old" center block/mount.

From what I understand, is that machines with higher time on them were having problems with frames cracking around the (old-plastic) engine mounts. I doubt this was the case with YS engines, but with OS engines this could be a problem.

I had about 170 flights on one machine with the old set up and didn't have any cracking problems. I would however like to eliminate some of the foaming/vibrations with this new system.

Jeff

To hover is divine, the alternative is rather PLANE.
06-07-2008 12:54 AM
 
 
rchaas
Senior Heliman
Location: Tulsa, OK

The other thing it will do is spread the load in crashes so that the frame won't break at the lower margin of the old-style center block. Of course, now it will break somewhere else instead, but that was a really weak spot previously. I've even had the G10 crack at that location from a hard landing! I'm using the new block and metal engine mounts on one of mine with a YS.

I can't say for sure if there is less vibration, as mine wasn't foaming much to begin with. Definitely makes the whole structure much stiffer, and i think that is a good thing.

Not essential, but i like the design better.

Robbie
06-07-2008 12:56 AM
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

I am just like others have said. I didn't have a lot of fuel foaming to begin with, but now there is less and the SE side engine mounts are nice in that they make the engine a lot easier to pull since it uses much shorter bolts.

Norman Ross Jr.
06-07-2008 02:17 AM
 
 
spdntckt
Heliman
Location: San Jose, CA USA

Just curious. i dont have the new side mounts yet to compare.. does anyone know how much heavier the side engine mounts are compared to the old composite ones?
for sure i am putting the new center block in.. still debating on the side mounts.. trying to keep weight down as much as possible.
06-07-2008 02:29 AM
 
 
Bart B
Veteran
Location: Synergy alley

I weighed them but forgot the numbers.
They're a little bit heavier,not too bad though.
Norm you're right about the shorter bolts,comes out easier.No long bolts to fiddle with.

....sometimes you're the blade,sometimes you're the bug.
06-07-2008 02:35 AM
 
 
HiroboFreak
Senior Heliman
Location: Central Coast, NSW, Australia

So are there any 4mm cap screws supplied with the new side blocks?

Synergy N9 | T600n Pro
06-07-2008 02:46 AM
HOMEPAGE  
 
 
creightoncarr
Veteran
Location: Missouri City, Texas - USA

Quote 
So are there any 4mm cap screws supplied with the new side blocks?

Silly question - this is Synergy after all. Those will cost you an extra $4 apiece.
06-07-2008 03:40 AM
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

EXACTLY. No hardware provided. Forgot who you were talking about didn't you. Like it was said this IS Synergy. Might have cost $10-$12 a piece to machine the bolts you know.

Norman Ross Jr.
06-07-2008 04:13 AM
 
 
Bart B
Veteran
Location: Synergy alley

Or.....you can spend a couple of bucks and buy somethin like this.
A very small sample of my inventory.
I bought a whole lot from Mcmaster Carr 2,3,4 mm
That way,when I remove a screw I can toss it and get a new one.
The common 3mm caps are $5 for 100pcs.
No problems/perfect sizing every time No boogered up threads.



....sometimes you're the blade,sometimes you're the bug.
06-07-2008 05:18 AM
 
 
Rymps
Senior Heliman
Location: Indianapolis and Windsor CO

Ace hardware has a big selection of cap screws in metric. That is were i get mine. you can buy the peice buy peice.
06-07-2008 06:44 AM
 
 
baddraptor
Elite Veteran
Location: valencia, ca- usa

I am having foaming issues with the Ys and the SE center mount. I had little to no foaming before. But know at 1820 on the head its like the perfect storm in the tank, below that it is very calm. I have the start shaft dialed down to under 0.001, so I know its not that. Will a Ys sr vibrate alot if its running rich??
I must say though, now at an idle the tank doesnt even ripple.

**Unattended children will be givin a shot of espresso and a puppy**
06-07-2008 10:45 PM
 
 
Rymps
Senior Heliman
Location: Indianapolis and Windsor CO

Hey baddraptor
Try raising you headspeed 10 RPM or Lowering the headspeed 10 RPM and see if the foaming gose away.
06-08-2008 01:20 AM
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

Yes, every engine has "rough spots" in it's RPM range. Bump it up a tad or down a tad and I bet it goes away.
06-08-2008 02:07 AM
 
 
baddraptor
Elite Veteran
Location: valencia, ca- usa

Turns out it was running a little rich on the high needle. Leaned it out a couple clicks and now its smooth as glass.

**Unattended children will be givin a shot of espresso and a puppy**
06-08-2008 02:49 AM
 
 
SynergyRC
Heliman
Location: California

HiroboFreak,

M4x16 Socket Head Caps Screws are being included with the SE Engine Side Mounts. Our apologies if you didn't get these bolts on the first run. If you see Matt Botos or Todd Bennett at a funfly they would be more than happy to provide you with these four bolts.

Team Synergy
06-08-2008 03:17 AM
 
 
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Synergy R/C Synergy N9 > SY510-315 New center block review and installation
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