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CarbonXtreme . Midland Helicopters . HeliProz

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Synergy R/C Synergy N9 > Clutch not engaging
 
 
getfurious
Veteran
Location: Exeter, NH

When I started my Synergy for the first time today I noticed that the clutch took alot of RPMs to engage. I believe the clearance between the liner and the clutch are to far apart, but since it is preinstalled I did not think much about it when I put it in.

Anyything I can do about this or what kind of glue they use to put it in?

Everything else seems good besides the missing thumb screws in the kit.

Paul

A skilled pilot without flight discipline is a walking time bomb.
08-06-2006 Over year old.
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

funnily enough i have this aswell.

i think again it falls down to the design of the clutch/fan system, if you think about it the clutch is bolted directly onto the fan hub, this also includes the part of the clutch that has to spring out to engage. if you look at the raptor 50 for example that is exactly why it has a shim in there.

a simple shim will fix it though, ala rappy 50.




i'm not sure wether to add another layer of liner or to spread the shoes slightly. i'm leaving it for a while to see if it eventually bites correctly though. perhaps it's meant to be like that?

cheers


www.waterfoothelis.com
08-06-2006 Over year old.
HOMEPAGE  
 
 
cricket
Senior Heliman
Location: scottsdale az

I have watched Jason for 2 years and he uses a high RPM clutch lock up. Just got back from the field and mine is the same but all or the Synergy birds have the same set up. 8 tanks through mine and its getting broke in and leaning down the motor.
08-06-2006 Over year old.
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

i was thinking of leaving it as it will help with starting up, not much danger of the blades spinning with the clearance there.

just maybe one quirk of the synergy, but the vids i have seen don't appear to have this trait????

cheers


www.waterfoothelis.com
08-06-2006 Over year old.
HOMEPAGE  
 
 
getfurious
Veteran
Location: Exeter, NH

I just looked quick through a couple of vids and did not really notic a high rpm to engage the clutch.

A skilled pilot without flight discipline is a walking time bomb.
08-06-2006 Over year old.
 
 
Chuckie
Key Veteran
Location: Crofton Maryland, MHA member

The base of the clutch is mounted to the fan hub so the clutch elements should not be touching anything in the first place. Putting a shim under the clutch will not make it engage earlier.

My clutch is engaging on high throttle as well. Not sure if this is normal so I've got a call into N9 tech support. I'll report what TB says.

9 flights so far and the machine is really flying well. I'm very impressed and surprised on how well it flys.

Charles

Please stand by for faster service!
08-06-2006 Over year old.
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

please report back what you find out, the clutch does touch the fan hub tough.....i know that bloody thing better than the back of my hand after the collet fiasco.

a shim will make it engage quicker for sure if it is being clamped. if you don't put that shim in the rappy clutch it does exactly what the synergy is doing....don't ask how i know this either

cheers


www.waterfoothelis.com
08-06-2006 Over year old.
HOMEPAGE  
 
 
getfurious
Veteran
Location: Exeter, NH

I was just about to PM you Chuckie. Thanks for the info and I am glad I am not the only one.

Paul

A skilled pilot without flight discipline is a walking time bomb.
08-06-2006 Over year old.
 
 
Will B
Veteran
Location: Bicester, Near Oxford, UK.

Mine engages at High RPM also. Would be interesting to hear what the score is on this from the horses mouth.

Cheers, Will.
08-07-2006 Over year old.
 
 
RockDoc
Senior Heliman
Location: Middlesbrough, England

Mine also needs a high RPM to engage. I did think the clutch was slipping originally and wondered if the liner had been glued in but it seems OK once your in the air.

D.

Sponsored by Barclaycard!

www.clevelandheli.co.uk
08-07-2006 Over year old.
HOMEPAGE  
 
 
Chuckie
Key Veteran
Location: Crofton Maryland, MHA member

I took my clutch out this am, I'm getting ready to go to IRCHA so have time to play today, and now agree with raptorheli2 that the clutch shoes do touch the surface of the fan hub, increasing the resistance so they don't move out or in as easily. There were circular lines cut into the black surface underneath the clutch.

I believe in my case the problem is in getting the fan and clutch dialed to very low numbers. As mine are; 0.002inch at the fan, 0.006 lower clutch shaft, and 0.013 top clutch shaft, the clutch is not on straight enough to prevent the clutch shoes from touching. If the fan hub and clutch were on straight I don't think I'd have any problem.

I need to pull my engine and re dial indicate the fan and clutch.

Charles

Please stand by for faster service!
08-07-2006 Over year old.
 
 
Aerospire
Senior Heliman
Location: Honolulu, HI

We don't have a synergy to test but here's something you guys might want to think about with this high rpm clutch engagement issue if you are using a governor.

Depending on where your clutch engages, if that point is higher than where your governor will go in an overspeed condition, this can cause wear on your clutch since it can be engaging and disengaging during flight.

Something for you to consider and look out for.

bob
08-07-2006 Over year old.
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

chuckie

i'm glad you now see what i was talking about

i have dialed the fan and clutch ( i think everyone on RR knows about that now ) and it's not that that is the primary cause, there needs to be a shim under there and that will cure this easily. i'm concerned about the clutch disengaging at times i don't want it to and as aerospace says it will cause more wear on the liner with the speeds it engages.

i would like to take the fan out and make a shim for it but after my hassles i'm REALLY not wanting to do that as i KNOW it will knacker the alignment again and i'll spend hours with the dial gauge again.

has anyone tried spreading the shoes a little through the clutch bell? that would eliminate the need to strip the unit out although i'm sure there is cons to doing this. or perhaps a thicker liner would do the trick, altough both these methods only mask the real problem. it needs a shim.

DAMN it, i think i just talked myself into taking it apart and making a shim

cheers


www.waterfoothelis.com
08-07-2006 Over year old.
HOMEPAGE  
 
 
Chuckie
Key Veteran
Location: Crofton Maryland, MHA member

"has anyone tried spreading the shoes a little through the clutch bell?"

I used to do that with my Fury but be careful you don't pull them out too far.

I just finishing dialing in my fan and clutch this am, (Fan .001/clutch 0.003) so see my new post on how I dialed the fan hub. I put the indicator on the inside edge near the engine bolt.

Charles

Please stand by for faster service!
08-07-2006 Over year old.
 
 
richyrich
Senior Heliman
Location: Milton Keynes, Bucks - UK

Is it definately the clutch slipping? and not the sprag bearing on the main gear slipping, as we had one at our field which seemed like the one way unit was slipping?
08-07-2006 Over year old.
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

it's the clutch for sure, the engine rpm's are at maybe 6-7k i would guess before it engages properly

cheers


www.waterfoothelis.com
08-07-2006 Over year old.
HOMEPAGE  
 
 
getfurious
Veteran
Location: Exeter, NH

I spread the shoes a little last night and tried in again in my back yard. Did not make that much of a difference. Maybe I did not do it enough, but I am not going to spread them any more. However, when the clutch engages (at least 7k rpm) it stays there and does not slip.

I would like to hear from someone at Synergy that this is how it was designed and it is normal. From the videos I have seen it looks like the clutch engages early like any other heli.
(Mostly this video on rrtv Huntsville 2006 09-HV-Jason-Synergy)

Paul

A skilled pilot without flight discipline is a walking time bomb.
08-08-2006 Over year old.
 
 
Kinger
Elite Veteran
Location: Columbus, OH

So is everyone sure this is just not a clutch to liner gap problem?
08-08-2006 Over year old.
 
 
Chuckie
Key Veteran
Location: Crofton Maryland, MHA member

I talked to JK at IRCHA about my clutch and he said he will look into this. I've sent him the clutch and bell sizes from a friends machine.

I would not try to spread the clutch shoes as you might break them off the clutch. FYI

Charles

Please stand by for faster service!
08-15-2006 Over year old.
 
 
fiordaliso
Heliman
Location: Bregenz/Austria

Clutch broken

Yes, be careful. A fiend of mine did the same and broke it. Then he tried with another one and it worked well. The clutch now engages properly.
Synergy has to react asap and hopefully correct this production problem!

Take care
Michael
08-16-2006 Over year old.
 
 
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Synergy R/C Synergy N9 > Clutch not engaging
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