RunRyder - Quick UK fan blows in flight....Anybody else had this happen?

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After Market Accessories > Quick UK fan blows in flight....Anybody else had this happen?

hotstuff

New Heliman - Location: M.I.A -

Has anybody else or know of anyone that had a Quickuk fan blow in flight? I don’t recall seeing any threads in other forums of this occurring to anybody else.

Just like to know if this is a one off or a more common occurrence. Thanks in advance.

07-22-2007 03:59 PM

FenderBean
Veteran
Location: savannah, Ga

wow I would like know myself thought about getting one myself

07-22-2007 04:40 PM

Captain Crazy
Senior Heliman
Location: Wakefield, England

Me too, would like to know more.

07-22-2007 07:23 PM

Salty
Elite Veteran
Location: Jville Fl...Ahhhh getting better

I've never seen one fail like this, It would seem to me that you either lost a shoe on your clutch or it was out of balance and vibing and the fan suffered from metal fatiuge...I'd contact Budd though...Its not something I would worry about happening on a regular basis...

Supporting single moms scince 1995...............

07-22-2007 09:54 PM

darren1
Heliman
Location: West Mids, UK

Yes m8 happened to me. Just run the os 90 engine in when it broke. The alloy got sucked in through the carb and totaled it!! Spoke to Bud and made a deal were I got piston, rings, conrod, gudgeon pin and plastic intake shroud for r90 at trade. I was well chuff as the fault may have been my fault. Use quk fan on my r50 for the last 2 1/2 years no probs.

07-22-2007 10:43 PM

D.C.heli
Heliman
Location: Toronto, Canada

I would say it's a rare isolated occurrence/failure, regardless of the cause.

Bud at Quick UK makes some of the best, highest quality products on the market...Period.

Darren

07-23-2007 02:54 AM

daren
Veteran
Location: Hampshire Sponsored by Quick UK

I'm still using one of the first batch of these fans and have done hundreds of flights with it,

I've seen people use the two clutch bolts for leverage while cranking up the crank nut also a bad engine alignment will put alot of stress on the fan,

Give Budd a shout he'll sort you out, Great guy to deal with.

Daren
Using the ground to reverse engineer

07-23-2007 10:08 AM

HOMEPAGE

hotstuff
New Heliman
Location: M.I.A

The engine is an OS 91 SZ-H PH Hyper brand new. It replaces another Hyper that became inconsistent in running which I suspect is to with the regulator. The Quick UK fan was installed at the same time as the engine and it replaces a plastic Raptor 90 fan.

Connected to the engine is a Hatori 970 tuned pipe, which boosts engine power.

Initial flights were mostly hovering with some forward gentle flying using throttle curve and engine running rich for running in.

After running in the engine was tuned for full power and for getting onto the pipe.

The first flight was done with just loops, rolls and some flips the governor was set for 15,500rpm the heli was performing perfectly.

It was on the next flight that the fan blew during a tail down tic toc. There was a distinct bang with an abrupt engine rev up. I hit throttlehold and performed a successful auto. The engine continued to idle once landed. Again the governor was on for the flight.

Upon removal of the engine the clutch and the two retaining bolts fell out. The only damage is the fan as pictured and scuff marks underneath the clutch. No shrapnel was sucked into the engine due to the stocking air filter. There was also no shrapnel caught up in the fan or anywhere else. The governor also works fine.

I have measured the thickness of the alloy at the break with an accurate caliper and it measures as 1.48mm. To me this seems a tad on the thin side.

07-26-2007 09:29 AM

Snake Rimmer
Senior Heliman
Location: Up north in the England

The best thing to do is contact Bud, he probably might want to see the fan, just to make sure there are no floors that could cause problems with other fans.

By all accounts you will sort something out with him.

To infinity and......................... the ground............Paul

07-26-2007 09:49 AM

garry keogh
Senior Heliman
Location: Wicklow, Ireland

Hi Hotstuff

I have an opinion...for what it is worth?

I have looked closely at my fan and my initial thoughts were that maybe there was too little material in the stem portion of the assembly. BUT, then I thought a little. If you sliced (sectioned) through the fan hub at this point, you will see that there is in fact quite a large area of material. The point at which the wall is at its thinnest is also where it has the largest diameter.
The load that this must bear in normal operation is only the torque of the motor. If it is carrying ANY other load it is because the assembly or installation is not correct. By this I mean, the clutch is eccentric, out of balance or the motor and start shaft are not aligned correctly.

My Theory
Without prejudice, may I suggest that one or both of the clutch retaining screws may have worked loose and was scoring the inside of your clutch bell causing the radial load that resulted in the failure. In my mind the material and design of this fan are absolutely fine. I know that Quick UK have sold very many and I have not seen any reports of consistent failure rates.

My Conclusion
I can only speculate, but, I do feel that some other influence beyond the torsional load of the motor was at play. If this was in fact the case, it is understandable that the material would fail. Aluminium is a coarse grained material, even the high quality alloys used by Quick UK. It is given in engineering design that you avoid this sort of stress and in defence of Quick UK, in normal circumstances there is no cyclical load on this part. Imagine the thrust downwards on this fan if one of the screws had backed out and was pushing against the inside of the clutch bell. I would expect something to let go in this situation.

Just my 2c

Garry

07-26-2007 09:57 AM

ZXXflyer
Key Veteran
Location: stone mountain, georgia, US

That is crazy lookin! I run their fans on everything I can, and have never had a problem.

07-26-2007 10:01 AM

HOMEPAGE

Russ Delaney
Senior Heliman
Location: Ashbocking, Suffolk, UK

Clutch

just looking at the photo and looks to be a lot of clutch liner dust about, was the clutch pinion intact, free running in the bearings? looks as though something was binding?
was the scoring on top of the fan blades as a result of the fan breaking or possibly something being injested.
Ive never had any probs with the 50 fans at all but have heard of the pinion gear shearing at the lower bearing.
just a thought.

Team Quick UK Pilot 20

07-26-2007 06:53 PM

John M
Senior Heliman
Location: Next door to the Wombles UK

I agree with Russ

The first thing I would question is the dust around the entire engine.

Something was not right.

07-26-2007 07:02 PM

Wa11banger
Elite Veteran
Location: Huntsville, Al

I have two of them.. The first I bent with a bad crash but it still did not come apart like that and has no cracks.. It is just 4thou out of round because of the bend.. The second has been in service for quite some time.. I also do not believe this is more than a one off failure and due to the amount of materials around the fan there could be other circumstances at work here. Your best bet is to contact Budd at Quick UK and talk with him. He is a very fair person and could possibly shed some light on why it would fail in this manner.

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, and K&B Dream Designs Teams

07-26-2007 07:40 PM

HOMEPAGE

Riders1
New Heliman
Location: Sylvania, Ohio USA

I agree with Russ and Rick. But I find it interesting that Irwin has the b@!!$ to comment on this thread as we are all aware of the consistant low quality of his parts. I have been running the Quick UK fans and all of there parts on all my helis and I can say that I find the quality to be first class.

07-26-2007 10:29 PM

HOMEPAGE

RCHeliJim
Key Veteran
Location: Orem, UT USA

Quote
But I find it interesting that Irwin has the b@!!$ to comment on this thread as we are all aware of the consistant low quality of his parts.

Did he erase his post? Didnt notice it in the thread....

Go Fly, Have Fun!!
-Team Quick UK
-Team RCHeliMag

07-26-2007 10:50 PM

HOMEPAGE

Wa11banger
Elite Veteran
Location: Huntsville, Al

It and my response were both removed.. I apologize for my reaction guys.. My response to Irwin did nothing to add to this topic.

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, and K&B Dream Designs Teams

07-26-2007 10:56 PM

HOMEPAGE

RCHeliJim
Key Veteran
Location: Orem, UT USA

No problem man, if I had seen his post I more or likey would have been just as guilty in responding

Like it has been said before, Budd will take care of this and in the slight chance that there is a defect - he WILL fix it. Quick UK makes high quality stuff and the customer service is great

Go Fly, Have Fun!!
-Team Quick UK
-Team RCHeliMag

07-26-2007 11:03 PM

HOMEPAGE

Riders1
New Heliman
Location: Sylvania, Ohio USA

Gee guess his post was deleted, anyway if there is ever any problem with a Quick UK part I know for a fact that Bud will make it right.

07-26-2007 11:38 PM

HOMEPAGE

Droid
Elite Veteran
Location: Deep down in the Southwest- UK

Clutch dust

What was the outcome??

12-10-2007 12:47 AM

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