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HomeAircraftHelicopterBlades and Night Flying › I hope you check you tail blades
04-02-2009 06:36 AM  9 years agoPost 1
Jamin_00

rrApprentice

Essex UK

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My 700 got decked last week due to these tail blades.Fresh on and on my 4th flight when 1 decided to break away from the tail grip leaving the bolt still in the grip,still tight with the brass insert left on the grip.

Straight through the main bladesand sent the heli spinning down to earth.

I hope you check your !!!

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04-02-2009 09:50 AM  9 years agoPost 2
J2M

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UK

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Scary. Thanks for the warning. Hope your 700 is OK

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04-02-2009 02:20 PM  9 years agoPost 3
Jamin_00

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Essex UK

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It will tonight but at the cost of £140

The place I brought them refunded me

It seems they do not have a customer support team.no phone numbers just email.

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04-02-2009 02:26 PM  9 years agoPost 4
Ghostrider

rrElite Veteran

San Diego, CA

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That sucks! I had tried a pair of the main blades in Vegas and really liked them. Now you got me concerned.

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04-02-2009 02:29 PM  9 years agoPost 5
Jamin_00

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Essex UK

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I thought it might be just 1 slipped through but when I took the other blade off that had all started to break away too by the grip.

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04-03-2009 07:19 PM  9 years agoPost 6
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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At my club last weekend one pilot crashed and on inspection one of the main blades had split all the way round the seam.

We have a guy in the club who makes F1 racing car bits out of carbon and on inspection he concluded the contruction to be below par. The blades are made in two halfs and then just stuck together. He could see that the carbon was not cured as a complete blade.

So yes the blades are very stiff and fly great but you may want to double check your blades by twisting them to see if they are starting to weaken. This is on the blades here http://www.modelhelicopters.co.uk/a...es_Torsion.html
scroll down to the TB690s.

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04-03-2009 07:43 PM  9 years agoPost 7
Jamin_00

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Essex UK

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Sorry to hear about that,where they new?

Cause a lot of damage to the heli.

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04-03-2009 08:49 PM  9 years agoPost 8
Andy from Sandy

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Bedfordshire, UK

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Sorry to hear about that,where they new?
Just a few flights old
Cause a lot of damage to the heli.
Not massively after a quick look, all the usual suspects got damaged.

Thanks for asking.

The thing is though others will say it is only one set of blades so don't cause a panic or fuss. The real point of this is that someone who knows all about carbon construction says, "They are not very well made."

That was a good enough reason for the owner to never consider using these blades again.

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04-03-2009 08:50 PM  9 years agoPost 9
Barney

rrKey Veteran

Inverness Scotland

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Jamin-00

Your tail blade problem is caused by the design of the Align tail grips which are a one piece moulding. If you look down the grips they are hollowed out to allow fitment of the bearings.

What happens is the bush can work out sideways from the blade far enough to start overloading the mounting hole.

This also happens with other tail blades brands too. I now push the buses out of my tails, roughen the brass bush and re-insert with some epoxy. A similiar problem can occur with some of the larger JR helis.

We need to add a visual check to our pre-flight, as even epoxied I find they can still occasionially back out.

Ive been flying both the Torsion Carbon 600's and Glass version without issue for a few months now.

cheers Brian

SPARTANRC Team pilot

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04-03-2009 08:56 PM  9 years agoPost 10
Jamin_00

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Essex UK

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Another area of doubt now,god damn it

Thanks for your reply though.

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04-03-2009 09:09 PM  9 years agoPost 11
TankDirt

rrKey Veteran

Illinois

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This has not happened with any other,with me,so it still must be a manufacturing defect.
just because it hasnt happened with another brand tail blade that means it didnt happen with these tail blades? the brass bushing walking out is a common problem and ive seen it with many different tail blades and when that happens reguardless of the blades company it throws the blade.

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04-03-2009 09:45 PM  9 years agoPost 12
mharpo

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Louisville, KY

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I don't. Thanks.

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04-03-2009 09:48 PM  9 years agoPost 13
Jamin_00

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Essex UK

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I did not know it was a common problem at all.Sorry for doubting you Barney

So is it a case of doing what Barney suggests?

But what is still concerning me is the comments from Andy about the mains

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04-05-2009 10:52 PM  9 years agoPost 14
Jamin_00

rrApprentice

Essex UK

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I have editied the title as i now feel it was unjustified.

I have also received a reply from Petr Novotny asking for the blades to be sent back to them for inspection

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04-06-2009 08:20 PM  9 years agoPost 15
TankDirt

rrKey Veteran

Illinois

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But what is still concerning me is the comments from Andy about the mains
I wouldnt worry about it unless he desribes what acctually happened. From what he said it sounds like it wasnt the blades fault. Ive wrecked Radix blades and had it split by the blade bolts, crash damage is just that, crash damage.
Reguardless of the brand of blade its going to break when it hits the dirt, just think of all the force thats on it!
So is it a case of doing what Barney suggests?
Thats one way of doing it, you can get different grips that wont allow the brass bushing to walk out on either side, or you can just keep a close eye on it. Any of those will work.

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04-06-2009 08:24 PM  9 years agoPost 16
RappyTappy

rrProfessor

Traveling the USA

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That totally sucks. I quit running carbon tail blades for a few years now and couldn't be happier, still get great performance and they're much more durable.

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04-06-2009 08:46 PM  9 years agoPost 17
TankDirt

rrKey Veteran

Illinois

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yeah K&B tail blades rock! Much better feel in the air than Carbon IMO, plus you can get lots of different colors.

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04-06-2009 08:54 PM  9 years agoPost 18
Jamin_00

rrApprentice

Essex UK

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Did not even know you could get plastic tails this size,but saying that never looked.

Can someone tell me if the Quick UK upgrade tail assembly does not have the gaps either side where the blade sits in like the Align Holders so the brass bit cant come out,or even the Align upgrades

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06-01-2009 09:07 PM  9 years agoPost 19
Jamin_00

rrApprentice

Essex UK

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Just received another email from Petr.

He has offered me some of his new 690mm blades,paddles for the 90 size and 2 sets of the tail blades all for free as compensation.

I think this is very good and of course accepted his offer

Excellent customer service,did not question me to death and try to blame me for the failure.

Hats of to Torsion and Petr Novotny for this excellent level of service.

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06-02-2009 03:03 AM  9 years agoPost 20
tchavei

rrProfessor

Portugal

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glad you got it sorted

Anyway, I just want to say that I had something similar happen with other brand tail blades (KOK) on my vibe 50. The only difference is that they didn't split but delaminated the outer epoxy coat at the root which made the brass insert be ripped out... or better, the blade was ripped out leaving the brass insert.

Post crash inspection revealed that the other blade was delaminating too. I then remembered that I touched with my tail a few times during autos. Nothing important, just a slight "vrum" during landing but that was enough to make the epoxy crack and the destruction process was initiated.

Always check your tail blades. In doubt, throw them away.

As a final note, I'm still using Kok extreme tail blades because they look good in the air and I had no further problems with them.

By the look of the design of the torsion (mostly white with black logo) I'm pretty sure they look good too.

Maybe my next choice in the future.

Regards

Tony


--------------------
"Perfection and patience usually walk side by side..."

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HomeAircraftHelicopterBlades and Night Flying › I hope you check you tail blades
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