RunRyder - EVO 90 Head Broke In Flight

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HIROBO X-spec - Freya - Sceadu - Shuttle > EVO 90 Head Broke In Flight

SolarXtreme
Veteran
Location: Arroyo Grande, CA

During my third flight yesterday I got a big surprise in the middle of a nose first hurricane my EVO 90 tail kicked out violently and then began pirouetting. I flicked into hold and auto'd down. I had thought I had set it down perfectly only to watch it explode after touchdown! Me and a buddy of mine were trying to diagnose what had happend to cause the tail problem when we found that the tail blades were completly broken off. One side had about 1/2" and the other side had about 1" of tail blade left. After further investigation we found that the plastic head yoke had broken IN FLIGHT which caused the head to pitch backward, right into my tail blades! When I autorotated down the crack had widened enough to allow the head to swing right into my tail boom and cause a boom strike on landing. After I got home I pulled the stock yoke off the ship and found that it had cracked completly across both sides of the yoke. The crack had started from the dampener hole and ended just below the blade grip. I will get a picture up here tonight to show the exact spot of the crack.

.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-24-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

this is the 2nd reported incident of the evo yoke cracking
near the damper hole.

04-24-2006 Over year old.

HOMEPAGE

SolarXtreme
Veteran
Location: Arroyo Grande, CA

I just did a search and saw the post you are referring to (I think) here. My crack is in the exact same place except it broke all the way through the yoke.

Are we asking too much of the Freya Evolution? I am running just over 7 degrees cyclic with a well tuned Y.S. 91. I do have 530 flights on this model and I do overhaul it and make sure everything is smooth and nothing is coming loose.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-24-2006 Over year old.

HOMEPAGE

d3sbo
Senior Heliman
Location: cambridge uk

http://www.runryder.net/helicopter/t233296p1/
like this ?

04-25-2006 Over year old.

SolarXtreme
Veteran
Location: Arroyo Grande, CA

Quote
http://www.runryder.net/helicopter/t233296p1/ like this ?

Yep except mine broke on both sides and the crack isn't nearly that wide. I am running the stock 60d dampeners.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-25-2006 Over year old.

HOMEPAGE

d3sbo
Senior Heliman
Location: cambridge uk

orry yours wint in flight
so the next question is do you trust the plastic one
i got the metal one

http://www.runryder.net/helicopter/t219680p1/

04-25-2006 Over year old.

balsapro
Senior Heliman
Location: Gallatin,TN

mine started to crack after four easy flights.

Build the Best, Fly the Best, Crash the Best

04-25-2006 Over year old.

SolarXtreme
Veteran
Location: Arroyo Grande, CA

Well I don't know. I may get the metal yoke for my Avant and move the plastic one to my Freya. It just broke nothing I could of done to prevent it and I don't want it to happen to my Avant.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-25-2006 Over year old.

HOMEPAGE

bparro
Veteran
Location: indianapolis,in

Actually...WreckRman2's yoke cracked all the way through also. Iam starting to get worried about flying mine more now

I first saw this problem in a post about installing CX dampeners into the evo 90 head yoke. It is interesting that it cracked in the same place just installing the dampners!

04-25-2006 Over year old.

Augusto
rrAdvertiser
Location: San Diego, CA

bparro,

That is why we took the CX EVO-90 V2 dampeners out of the online store. We had had several reports of the STOCK rubber dampeners breaking the yoke and we didn't want to start getting blamed for that and have people thinking that it was our dampeners breaking the yokes.

The issue is related some yokes being weak somehow. I'm sure Jeff Green is taking care of this issue.

Augusto.

Avant Aurora Ultimate

04-25-2006 Over year old.

SolarXtreme
Veteran
Location: Arroyo Grande, CA

Added pictures. This head has over 500 hard flights on it. I have replaced the dampeners three times with stock dampeners and didn't see any sign of fatigue previous to the failure.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-25-2006 Over year old.

HOMEPAGE

bparro
Veteran
Location: indianapolis,in

Yes Augusto, I think you are right.

04-25-2006 Over year old.

WreckRman2
Key Veteran
Location: Indianapolis, IN

After taking mine apart it was indeed cracked all the way through... I bit the bullet and bought the $95 aluminum yoke and the carbon extreme 3d dampners.

________________
David Smith
317.777.3230
Hirobo Evolution 50, Thunder Tiger 53

04-25-2006 Over year old.

Taipan
Key Veteran
Location: Sydney, Australia

Hmm, it looks weak around the dampener area, needs to be beefed up. Getting the metal one would be the safest option.

04-25-2006 Over year old.

bparro
Veteran
Location: indianapolis,in

too bad it is a $100 option

04-25-2006 Over year old.

WreckRman2

Key Veteran - Location: Indianapolis, IN -

You seen it though and she sure is pretty... why aren't you ever on instant messenger?

________________
David Smith
317.777.3230
Hirobo Evolution 50, Thunder Tiger 53

04-25-2006 Over year old.

SolarXtreme
Veteran
Location: Arroyo Grande, CA

That is nice looking

. I think I will get one for my Avant. I want my Freya to be as close to stock as it can be. That's the whole point for me since it is strictly for practice.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

04-25-2006 Over year old.

HOMEPAGE

MRC-Hirobo
Key Veteran
Location: Edison, NJ

We have mentioned this topic to Hirobo, but as of today, we have only received two yokes. Those in the states, please send in yours if you had a problem. We will either replace it for you at no charge or offer the metal upgrade at a discount just for your peace of mind if necessary.

For me to help further, I need those parts in question to send back to Hirobo for inspection and improvement if necessary.

Anyone that has a problem from this part will be taken care of. Do not hesitate contacting us. All reports are taken seriously and investigated.

So far the reports are isolated. While RR is a great resource, contacting a MFR or agent, like us, about a problem like this is your quickest way to get a problem resolved.

Good thing someone sent me this thread, I had not seen it over the past few days. I should have seen it. I am sorry I missed it. If someone had called sooner, it would have been answered sooner.

In the future, please contact me at jeff@modelrectifier.com, 732 225 2100 ext 230 or pm through here. Please post your questions here, but at the same time, reach out. We are here to help and welcome the opportunity to do so.

I take this stuff seriously and not lightly.

Thanks!

Jeff

- Dan G. -

04-26-2006 Over year old.

SUB RAPTOR
Senior Heliman
Location: Galway Ireland

As its been siad there many times before Jeff you the man. I only wish we had someone like Jeff on this side of the pond.

Conor
"My piloting skills are proof that gravity does exist."

04-26-2006 Over year old.

HOMEPAGE

WreckRman2
Key Veteran
Location: Indianapolis, IN

Hey Jeff, I'll gladly send you mine for inspection but I've already upgraded to the metal yoke. I'll gladly take a free Hirobo TShirt instead of a discount though.

________________
David Smith
317.777.3230
Hirobo Evolution 50, Thunder Tiger 53

04-26-2006 Over year old.

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HIROBO X-spec - Freya - Sceadu - Shuttle > EVO 90 Head Broke In Flight

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