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09-07-2009 01:51 AM  8 years agoPost 1
bigwolf1

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USA

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I guess there having some temper issues because mine didn't make two gals. yet with the new novarossi .57. I may have to get me a raptor clutch. I'm going to contact them about this issue.

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09-07-2009 03:23 PM  8 years agoPost 2
JuanRodriguez

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The Villages, Florida

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When the Raptors first came out , they too were having an issue with broken clutches.....

It was discovered that the original gap between the clutch shoes and liner was excessive..... What many of us did to correct the problem was to install new "oversize" liners and then machine them down to give you a clearance of about 6 thousands per side or 12 thousands total between the clutch and liner.....

There may be a temper issue with your clutch but if the gap is excessive, you'll probably break a Raptor clutch as well.....

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09-08-2009 02:18 AM  8 years agoPost 3
bigwolf1

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USA

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yes well. I took out my clutch and it is broken.Not sprung. I never had one break yet with hyper 50. But the new novarossi 57 has BALLS!!!

I'm going to take a photo and send to JS. along with my frame spacer upgrade.

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09-08-2009 03:12 AM  8 years agoPost 4
brian94066

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San Bruno, California

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time for a clutch made out of better material

let's say carbon ceramics? XD

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09-08-2009 04:47 AM  8 years agoPost 5
bigwolf1

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USA

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here she is 12 flights didn't take long with the bigblock. Can't wait to see what else starts to fail with the new bigger engines.

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09-08-2009 06:39 PM  8 years agoPost 6
JuanRodriguez

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The Villages, Florida

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Your picture shows where all clutches fail, at the flex or "hinge" point.... it is the weakest point on the clutch.....

I honestly don't think the motor has anything to do with it....if the gap between the clutch and liner is excessive, they will all fatigue in that same spot and break...... it's just a matter of time....in your case, 12 flights is excessive , to say the least.....

No matter what they tell you or what clutch you decide as a replacement, make sure you have the proper clearance...... about 12 thousands total difference between the clutch and the liner.... if need be, glue in a second liner and fit the clutch properly.

Please keep us posted on what they tell you.......

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09-08-2009 07:20 PM  8 years agoPost 7
bigwolf1

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USA

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Ok the Raptor clutch at the hole is 2.10mm were it would break. were the JS clutch broke it is 1.65mm So It is thinner and weaker. I can bearly sqeeze the raptor clutch in the JS is softer I can sqeeze it in more than the raptor. So this can be improved on.

As well as clearance between the liner and clutch.

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09-08-2009 09:02 PM  8 years agoPost 8
Tradhunt

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Fairfield, Ca. USA

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One of the guys at our local field had his crack Sunday. It didn't break all the way like yours but it cracked about halfway. He installed the raptor clutch and had a couple flights with no issues.

I got one of the first kits out but I didn't run it long enough to see how the clutch held up before I sold it.

I'll probably pick up another one at some point along with the 90 when its out and the T.T. Is out.

I don't crash... I land with style

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09-09-2009 04:55 PM  8 years agoPost 9
VooDooX

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San Francisco Bay Area CA, US (San Mateo)

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bigwolf it may not be the clutch it may be the engine i saw somone testing it and he broke the clutch on a T600 with that engine also

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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09-09-2009 08:19 PM  8 years agoPost 10
bigwolf1

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USA

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I talked with Dan at amain. I"m trying another stock one to see if it happens again with this novarossi if it does we got a weak part. I do have a raptor clutch for a backup .

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09-09-2009 09:55 PM  8 years agoPost 11
Tradhunt

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Fairfield, Ca. USA

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I really don't see this being an engine issue as I have the NovaRossi 57 in my Velocity and their is 2 more at my field 1 in a Vibe and the other in a 600 and they haven't had any issues with them eather.

Like I said in my earlyer post one of the guys at our field has a pretty new Frenzy and his cracked at the exact same place yours did and that was with a OS50.

I thought I read a while back that some were having this issue before. I know I got a few PM's from a few people asking if I had any issues with my clutch.

I'm thinking more of a clutch issue in general. I'm in agreement more with Juan that the gap might be off eather the liner wearing out or just to much gap from the start.

I know when the local guy put the Raptor clutch in and he took it out to the flight line that when he throttled up it was reving pretty high before it started to ingage. We looked it over and he tried it again it did ingage a bit quicker but it still seemed a bit higher then before.

Just my opinion from what I've seen.

I don't crash... I land with style

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09-09-2009 11:31 PM  8 years agoPost 12
SteveH

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Texas

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The issue is not the clutch, but one of clutch alignment.

If the clutch and clutch bell are not perfectly square with one another (parallel), when the system is running, it tends to bend the shoes up and down as it goes around at 17,000 +,- RPM, and that fatigues the metal.

It will do it in any brand of heli with this type of clutch.

The government cannot give you anything without first taking it from someone else.

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09-10-2009 12:11 AM  8 years agoPost 13
JuanRodriguez

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The Villages, Florida

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If the clutch and clutch bell are not perfectly square with one another (parallel), when the system is running, it tends to bend the shoes up and down as it goes around at 17,000 +,- RPM, and that fatigues the metal.
Yes.... I was key'in in too much on the gap issue..... Although important, clutch alignment, as Steve suggests, is equally as important....

On the Raptors, alignment is checked by turning the start shaft backwards after everything is in place..... It should feel "silky smooth" without any "drag" whatsoever as the start shaft is rotated through 360 degrees..... Minor adjustments can be made by loosening the engine mounting bolts at the frames, engine to engine mount bolts or a combination of both.....

With the Xcells and Bergens, it was standard "SOP" to leave the start block bolts loose while you ran the motor at idle..... once things settled in, you would then slowly tighten the bolts while the motor was still running.... The idea was to let the clutch block assembly find it's own center....

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09-10-2009 01:59 AM  8 years agoPost 14
gondwnhard

rrApprentice

redwood city ca.

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VooDooX I think that was just a coincidence Luca was here for work for a few weeks after Las Vegas, before the 57 hit the market and we did joke about the 57 braking the clutch in his 600 but we were just joking.

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09-10-2009 08:35 AM  8 years agoPost 15
bigwolf1

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USA

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Ok new bell and clutch clearance is 9 total. the one that came out total clearance was 14. This is a new kit by the way. We shall see if there clutch material is soft and wears fast.

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