Synergy Tech Support
Synergy Nitro Helicopters => Synergy N5 / N5c => Topic started by: Tim J on September 05, 2016, 08:20:18 PM
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Hi guys
I was just wondering if any body else has had the bottom bearing in the clutch stack loosen up and turn in the clutch bell. It said it was factory installed, I used red Loctite on it, will see if that is going to work before I order a new bell. I Haven't had time to try it yet.
Just want to know if any one has had the same problem, and what they did to remedy it, besides buy a new bell.
Tim
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not on mine I haven't. make sure the rest of the stack is built nicely and aligned properly.
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Never had that problem either. I have built and flown several N5C's.
Cheers
Alan
Sent from my iPhone using Tapatalk
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K thanks for the reply guys, the manual said it was factory installed they must have misted the Loctite.
It makes quite a rattle as its spooling down no load on the clutch. I hope the red Loctite works the bearing was loose in the clutch bell.
I haven't been able to try it as the weather won't cooperate, maybe this weekend.
Tim J
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The rattle is likely something else. If you are hearing a bearing rattle (especially in the clutch) you have a MUCH larger issue. Your likely hearing the main gear to Pinon mesh, or something in the tt drive.
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I'm going to try it this weekend, see what it sounds like, the main gear mesh is good
it would rattle even when sitting at an idle
the clutch bell bearing had a lot of side to side movement sitting in the bell, it would just fall out!
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Hi guys
I replaced the start shaft, the bearings in the clutch stack and one way clutch bearing. Still have a rattle, I'm going to pull the engine and check the bearings, and install a set of Boca ceramic bearings wile I have it apart.
It's an intermittent rattle sitting a an idle, it will start and stop rattling. any ideas!
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all of mine do the same thing. its likely no problem at all. be careful with ceramic bearings, if/when they bust, they eat entire motors.
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I have the intermittent rattle at idle, with no other movement in the heli at all. It has the same noise at a hover I can hear it over the engine. It wasn't there this spring, was a new build new engine. If it's not engine bearings, I guess I will fly it until something let's go or breaks.
I have had good luck with the ceramic bearing's in my other engines, so far.
Not sure what it can be.
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99.9% sure I know what it is. the chambers inside the pipe have downspouts in them. like 90 degree turn downs. they are press fit in, not welded like you would think. if one gets loose, at idle and at hover (where there is not a ton of air flowing through the motor) you can hear it shake. once the motor is idled up, the air the motor is pushing through the pipe holds it tight and it stops.
I have had 3 hatori pipes for the 105 do this, and 1 for the 55. just keep flying it until you hear it rolling around in the pipe if you want. remember, IF this is the issue, there is a likelihood of engine damage. just like the motor pulls air in from the intake side, it does the same on the exhaust side. meaning, it POSSIBLY could pull a piece of aluminum (if any breaks loose) into the engine and damage it. it is a slight risk though.
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I would never thought of that, I will try a different pipe on it before I change engine bearings.
Thanks for the info Mike.
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I changed the pipe on my heli and finally got a day with no Gail force wind to try it.
It wasn't the pipe doing the rattling, so I guess next is to change the engine bearings.
not sure what else it could be!
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long as it sounds good while it is flying I wouldn't worry too much about it. they do seem to make odd noises at idle.
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I heard the rattle noise in flight yesterday, didn't sound good at all! I'm going to pull the engine apart
and check the bearings.
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I pulled the engine and checked the bearings, front one was good back bearing was very rough when turned by hand.
So I replaced them, the engine wouldn't have two gallons of fuel through it. I bought it new when I purchased my N5c kit in January.
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where do you store the heli? nitros really need to be stored in a conditioned space to keep humidity out of the motor. I always ensure my throttle is totally closed and piston at blocking the exhaust port when I am not flying them. I also do not run my motors dry, I simply turn them off and leave them be.
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I keep them in the Basement the humidity is at 40 %, I don't run them dry jut shut them off.
I was reading on an OS forum that some guys were having bearing problems also, they were the OS 55HZR limited.
That is the engine I run in two of my helis, haven't had problems with the other one!
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Yea, I typically change bearings in my 55hzr 2 times a year. Maybe 3 depending on the circumstances. My 105 on the other hand can go all season on a set (I fly roughly 10 flights on my n5c to every 1 flight on my n7). Try keeping your heli in a closet on a conditioned level of your home. Just wipe it down well and stick a paper towel in the pipe and be sure your carb is closed and you won't have any issues. The alcohol in the fuel will wick moisture in the air straight into the bearings. If that's not possible, consider a center Glide bushing.
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I hope this solves my rattle problem, I hope to try it Saturday weather permitting.
Thanks for all help Mike, and everybody else that chimed in.
Tim J
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The humidity here turns nitro into rust soup if left for too long. If mine is going to sit for a while I pull the back plate and put after run oil directly on the rear bearing and also on top of the piston through the glow plug hole. Put the back plate back on, make sure fuel line is pinched, pressure line disconnected, hold a paper towel over the glow plug hole and turn it over a second or two with my starter to make sure the ring gets coated. It's stayed in pretty good shape for a long while now. When I'm flying every day/every other day I don't worry about it.
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I try to oil my helis up if there going to sit longer than two weeks, I also plug the exhaust pipe with paper towel.
For winter storage I pull the engines out, clean them up and use lots of oil. I have only had one other set of bearings do that on me.
I keep the whole house at 40% humidity year round, so that shouldn't be a problem.
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I was able to get out for a bit today with my N5c, the new engine bearings did the trick.
it sound's Awesome without the rattle.
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awesome. was the cage broken? I had one do that to me one time and it rattled. that is a little rare though.
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No the cage was fine just rough when turning it in my fingers.
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got ya.
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I go through rear bearings regularly here in the Mid-West as during the flying season there is a lot of moisture in the air and since my heli's usually live in my truck the temp swings are just a fact of life for me. I do run them till they wont fire on the glow before storage. I might have to check out the Magnum Centerglide bearing out and see if that's the cure. I am too lazy to pull the bottom plate off my N7 an my N5c is easier but laziness prevails. I have a box full of new bearings to chew through 1st though.
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I was looking at the Magnum Centerglide bearing also, didn't know that was even an option for these engines.
Going to give them a call this winter, just to see what takes place.
I pull my engines out clean and oil them faithfully, when I'm finished flying for the season.
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Centerglide bearing is the ticket. Defiantly worth the money.