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Home✈️Aircraft🚁HelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Vibe 90 SG possible clutch align problem…
02-22-2010 10:45 PM  10 years ago
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tasosgi

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Athens, Greece

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Vibe 90 SG possible clutch align problem…
As you can see on the photo, the clutch is stand out from right side of the clutch bell a little (approximate 0.5mm). Is it normal??
I tried to corrected it but it was impossible.

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02-22-2010 11:22 PM  10 years ago
chopperben1

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Ontario, Canada

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I have the same problem. I could not fix it with the motor mounts or with play in the engine mounting block. I ended up fully loosening the top bearing block (the one that holds the clutch bell), and I really cranked on it to try to angle it, and I solved "most" of the problem, but i am still not happy because there is a slightly perceptible amount of the clutch at the front that still is not perfectly aligned with the bottom of the front of the clutch bell, exactly like your picture.

I am using a YS91SR.

- Ben
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02-23-2010 03:38 AM  10 years ago
G Steyn

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Heidelberg, Transvaal, Suid Afrika

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YS91SR here, also had the same while using an OS91HZ.

Don't stress, just make sure the clutch aligns PERFECTLY. It can cause a LOT of vibration. NB align the clutch front/back, and left/right!

On the HZ, I installed a shim between the motor mounts of 0.2mm to give me that little extra room. On the YS, nothing was needed for a perfect fit.

At the starter shaft bolts, the four M3x10mm bolts are sloted, and the two M3x8mm bolts are not. I drilled those holes a little bigger to give me more play for a perfect alignment.
Concentrate on your weaknesses and your strengths will reward you!
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02-23-2010 06:11 AM  10 years ago
Gorgin4325

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Florida

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YS91SR here too, and they fit perfectly and are flushed with the bell.

Loosen up the 4 bolts holding the engine, you can adjust it just enough to solve your problem, then tighten the 4 bolts slowly, 1/4 turns on each, until they are all tight.

Don't know if it helps, but at least this is how I got mine setup perfectly.

Regards,
G
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02-23-2010 06:32 AM  10 years ago
Parsifal

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Singapore

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Hmmm, i have the same issue... GStyn, can you expand a bit on the shims you used and where you installed them? would be much appreciated. I am running the HZ as well and all tightened up, the starter shaft and clutch rotate freely when spun by hand so i didn't think it was critical. Still bugging me though.

PArs
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02-23-2010 08:23 AM  10 years ago
G Steyn

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Heidelberg, Transvaal, Suid Afrika

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On the OS, I installed it between the Engine mount (Manual P25), and the Mount block spacer T96 (Manual P26)

Spacey is running an OS91HZ in a Vibe 90SG, without any spacing.

I tried to fiddle with loosening the engine/clutch bolts, but could not align perfectly, no matter what.

On The YS, everything just fitted perfectly.
Concentrate on your weaknesses and your strengths will reward you!
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02-23-2010 08:33 AM  10 years ago
BlueGarry1

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Romford, Essex, UK

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Just like G (Vibe90SG) I've had no problems at all. I use a YS91SR too.

Garry
Rave ENV Electric Beast X v3 FBL, Rave Ballistic BeastX v3, T-Rex 500 Beast X FBL
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02-23-2010 12:37 PM  10 years ago
chopperben1

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Ontario, Canada

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Ok, guys, thanks for the replies. I'll just keep at it. I know that this is the kind of problem that if you keep at it, you will fix it.

My frustration is that the clutch is perfectly aligned in the bell except for it is "tilted" forward, so it is a vertical angle issue, not a front-back or up-down issue (just like the picture at the top shows, therefore, adjusting the engine bolts did not seem to help).

If it was tilted sideways, I see how easy it would be to fix as it is easy to angle to engine in the mounting block a little this way.

Maybe I'll try sanding some material off the carbon fibre bolt holes that hold the starter block bolts to be able change its angle a little more (although in a high quality kit like this, this just doesn't seem right?!?).

I thought of putting a shim only under the lower engine mount bolts, because that would angle the engine, but I decided not to do this because I figured in the long run havine an engine that is not flush to the mounting bracket would cause other issues. Not sure though.

Tasosgi, that for starting this post and good luck with yours. Let me know if you fix it!

- Ben
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02-23-2010 04:22 PM  10 years ago
tasosgi

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Athens, Greece

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Thanks for the replies!!
I use OS91 HZ. I tried to align with loosen bolts but without result.

I believe the problem is because of the thickness of the Mount Block Spacer(T96). I think it should be a little thinner. Due to this larger thickness, the Clutch’s One-Way Bearing push the Start Shaft forward, causing the front of the Clutch Bell to be tilted-up. Maybe I’m wrong…

The reason I am insist to this is because I have vibration problem. Is true that I am still in ‘break-in’ but the high-frequency vibration at the vertical fin is to strong!

Tasos
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02-24-2010 01:08 AM  10 years ago
kevlar11

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Edmonton

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bell to clutch
Hello

I had a similar problem what I did was back off all the engine mount bolts on the frame and took some velcro and rapped it around the front of the engine and the frame from the heat sink and held it there with some force. Then reset the bolts on the engine mount to the frame. There was just enuff play to get it nice and level.

KD
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02-24-2010 05:20 AM  10 years ago
ScottyGray

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Waterloo, Ontario Canada

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Hi all,

Just wanted to post some ideas for getting the engine and clutch aligned easily. Hope this helps!

1. when mounting the engine to the mount itself, make sure to push the motor straight up and then snug and tighten all 4 engine bolts. This takes up the play in the engine lug holes and keeps it straight in the mount.

2. loosen the 6 M3 bolts of the clutch bell upper BB block (4x M3 that go into the pinion Bearing block, and 2x M3 that are the mesh plate holders. Even though there is the "mesh plates" to get the gear lash set easily, there is still a small amount of play in the thru holes of the mesh plates to allow super fine tuning of the mesh and/or the bell/clutch angles.

3. loosen the engine Block M3 screws in the lower frames to allow the block to float in the holes. Again, there is almost no play visually, but the slight amount of movement allowed when all the M3's are backed off allow perfect align of the engine.

4. Now that the pinion block and mount block are floating on backed off M3 bolts, install the engine mount to the engine block with the shim/H-spacer of course.

5. You will find the whole system self aligns once the engine mount is bolted to the engine Block. Snug the M3's of the engine block and the pinion BB block and check it all looks and feels good. Fully tighten once you are happy.

Many people find they get it right the first time during the build, but if it looks a bit off on first try, go through this again, and it really will work out fine.

What the mesh plates and no-slot system in the frames allow is a very close tolerance build, and generally easy setting of the mesh and engine fit. Not to mention, once you have this set the first time, you can pull the engine out and reinstall anytime without any of the alignment or mesh changing ever again!!

I've put together a bunch of V90SG's and never had any trouble of this alignment if you remember not to tighten everything down until the end.

If anyone needs any help feel free to drop me a message anytime.

Scott
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02-24-2010 05:55 AM  10 years ago
kevlar11

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Edmonton

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Vibe SG
Scott,

The Vibe SG was the best building/fitting heli I have had the pleasure to assemble to date! I know I'll be in trouble for not letting
John W. have this one to build LOL. I'm sure Scott H. will give it a "test"flight this summer! Thank you for the effort and time you spent developing this!

KD
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02-24-2010 08:10 AM  10 years ago
Gorgin4325

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Florida

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Scott,

I will print your post and attach it to page 26 of the manual

Regards,
G
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02-24-2010 01:00 PM  10 years ago
chopperben1

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Ontario, Canada

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Scott, thanks for the post...very helpful. I finally got mine aligned (looks perfect visually at least)!

I think the mistake I was making was leaving the small carbon fibre supports that help space the bolts in the starter bearing block snug...this didn't let the upper bearing block have enough play the first few times I tried.

Looking forward to getting this thing in the air!

- Ben
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02-24-2010 10:40 PM  10 years ago
tasosgi

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Athens, Greece

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Thanks for the replay Scott! Thanks the other guys too! Is very nice to know that they are people who are willing to help.

I found interesting the first step of Scotts instruction. I didn’t know that is important to push the engine up when I tight the engine mount bolts.

I hope I will manage to fine tune the heli an enjoy it as the other guys!!
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02-25-2010 09:08 AM  10 years ago
Parsifal

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Singapore

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Thanks a lot for the response Scott. It was very helpful in respect to improving my alignment.

On a separate note, once all of this is tightened up for alignment purposes, what happens to the gear mesh? Do you then loosen the mesh plates up again and put a piece of paper between the pinion and main gear to set the proper mesh? or is this irrelevant?

Pars
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