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CarbonXtreme . Midland Helicopters . HeliProz

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HIROBO Freya - Sceadu - Shuttle > Scaedu 50 Lossing tail blades in the air...........
 
 
dkshema
rrProfessor
Location: Cedar Rapids, IA

Quote 
I just bought a used evo 50 and I noticed a LOT of play, in all directions, in the tail rotor grips. Is this, uh, normal?


The play is normal. Centrifugal force takes care of the play when flying. TR works pretty darn good in the EVO 50.

Dave
06-06-2006 Over year old.
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

Fatigue sources start the death clock running

Excess vibration from a bent shaft or hub (Very common).

Previous damage from a dirt skip.

excessive head/tail speed could give problems over time but not too likely unless your into the 2100+ zone.

A miss-molded grip(airbubbles. It only takes one to fail and both wil be ejected.

Unbalanced tail blades

Missing spacer in grips between bearings to cause mass imbalance. Those little washers have shattered on some of my impacts. It is easy to miss. They are easy to forget during assembly as well.


From my experience (5 years on Sceadus/Evos), the grips are pretty well engineered and many pilots run the stock tail with the speed up pulley and 95's (I am one of them). Still a chance it had a bum part.

Keep searching!

Team MRC-Hirobo and Model Avionics Rep
06-06-2006 Over year old.
HOMEPAGE  
 
 
cebc7
Senior Heliman
Location: Panamá, Rep. de Panamá

Quote 
Just an idea but did your friend shaved off a little material from the tail blade holders?


Yes I did. 97mm are thicker than the ones that came along with the kit so you need to shave them a little. A lot of peoble have done this with no consequences. I´m guessing the problem was caused by a previous damage.

Quote 
did that heli have the tail speed-up gear in it?

No it has no speed-up gear.

I'll try the freya tail system.
06-07-2006 Over year old.
 
 
Leif
Elite Veteran
Location: Oxford, PA - USA

Another thing to consider is changes to the plastic chemistry over time. You mentioned this was an original Sceadu. How old were the blade grips? Some of the plastics used in heli manufacturing can get brittle with age. This is especially true if you store the heli in a location subject to temperature extremes.

Removing material from the grip would also contribute to weakness, as would excessive vibration from another part of the heli.

Leif
06-08-2006 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

Hey cebc7, wazup Carlos. I was very curious about this issue so the same sunday when I come back from the field I post your tail explosion problemo.

I remember you toll me about your tail wag problem and maybe this contribuite to the problem. Also there was a small vibration on your tail that can also contribuite too.

But as you read here there are a some people that have experience your same problemo and have cure it with the Freya tail upgrade.

Also, check this post: http://www.runryder.com/helicopter/...highlight=cebc7
There is somebody talking about a aluminum Bergen tail blade holder upgrade for the Scaedu...........Dont know the cost and maybe is overkill but check it out.

Good luck,

Isaac
06-08-2006 Over year old.
 
 
cebc7
Senior Heliman
Location: Panamá, Rep. de Panamá

Subsailor posted this fits the sceadu.
[url=http://www4.mailordercentral.com/heliproz/prodinfo.asp?number=825260]
06-08-2006 Over year old.
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

Find the problem 1st, if possible

There are way too many people flying Evos and I have certainley been around them long enough to comforatbly say there is not an issue with the tail engineering ect. If you want to move to the Freya tail fine, but you are likely missing the problem and root cause. There are better ways to part with your cash before resorting to the Frankenheli solution. Furthermore, there is nothing stopping this from happening with the Freya tail when you havent done a root cause analysis and found the issue. Eg, bent output shaft or warped tail pulley. After replacing both tail grips with new ones, I would try checking all shafts, hub, and blade balance.

Lief made a very valid point when asking about the current service life of the grips that failed. Plastic is not forever. They can stretch out if you are runing a HS tail. If they stretch unevenly which is likely, then an imbalance would slowly be introduced to ultimately fatigue the part to failure.

Team MRC-Hirobo and Model Avionics Rep
06-08-2006 Over year old.
HOMEPAGE  
 
 
rob_jones
Key Veteran
Location: Oglethorpe, GA

FWIW:

When mine kept tossing blades, I replaced everything. This includes the tail output shaft, both pulleys, the belt, tail blades, and i checked the bearings in the grips VERY closely. The next two times, the tail rotor blade grips were brand new. I was throwing money at it and it was still failing. When I switched to the Freya tail, all the problems went away.

Maybe I was just unlucky enough to get 3 bad sets of grips. Who knows. But I do know that it hasn't tossed a blade since I went to the Freya tail. And that's all I need to know!

-----
Team MRC Hirobo
I reject your reality and substitute my own.
06-08-2006 Over year old.
 
 
DS 8717
rrProfessor
Location: Here wishing i was somewhere else

Were you using a governor?
06-08-2006 Over year old.
 
 
rob_jones
Key Veteran
Location: Oglethorpe, GA

Quote 
Were you using a governor?


Who? Me?

If so, then yes. Set to 1950 RPM.

The first time it happened I was using blue Freya blades. I thought maybe they were too heavy so I switched to MAH carbon 92mm. After those got trashed, I tried SAB carbon 90mm. Now I have MAH 92mm with the Freya grips.

-----
Team MRC Hirobo
I reject your reality and substitute my own.
06-08-2006 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

I was checking this $49.95 QWW upgrade for the Scaedu 50

http://www.ewtech.com/hhi/cat/SC24_TripleTail.jpg

Have any of you have try it? Please I just want to know about this part, Dont want to hear nothing about Mr. Irwin.......JUST THE UPGRADE




Or what about this one? $39.95 Century CN2235 TRIPLE B.B TAIL ASSEMBLY but the Tail Blade Holders are plastic:




THX,


Isaac
06-10-2006 Over year old.
 
 
rob_jones
Key Veteran
Location: Oglethorpe, GA

Personally, I wouldn't touch anything from QWW with a ten foot tail boom. And there's a reason the Century parts only cost 40 bucks.

Of course, it's up to you. But you're better off with the Freya parts even though they cost more. You'll probably end up buying them eventually anyway...

-----
Team MRC Hirobo
I reject your reality and substitute my own.
06-10-2006 Over year old.
 
 
hootowl
Elite Veteran
Location: Garnet Valley, Pa.

You can also look at JR tail components. They are excellent. As you can see they use 4 socket head cap screws and nylok nuts to hold the halves together. Full bearing set, not half like the little EVO hubset. There is NO floppy sloppy like the EVO setup. This is about as good as it gets from OEM.

This is Ricks info...

Tail rotor hub JRP960470 $57.00


Tail Pitch Plate JRP960057 $2.63


Tail Pitch Link JRP960056 $2.63



This was on my Tiger50... Heli is gone but I kept the tail components



"Any man who says he is an American, but something else also, isn't an American at all.
06-10-2006 Over year old.
HOMEPAGE  
 
 
cebc7
Senior Heliman
Location: Panamá, Rep. de Panamá

Quote 
Personally, I wouldn't touch anything from QWW with a ten foot tail boom. And there's a reason the Century parts only cost 40 bucks.


Rob Jones you were right. The QWW tail came with different size spacers. I try to contact them several times. They even answer me and told me they will send them immediately. It's been 3 months since I bought those tail grips and I'm still waiting. They never reply my mails again. Shame on them.
09-16-2006 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

Hey cebc7, I just send a PM to Irwin about your issue. I hope he reply soon.

Isaac



.
09-16-2006 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

Hey cebc7, I send a PM to Irwin and he reply to me ASAP, I really dont undertand why you dont send him a PM like me to get your answer

Here is what Irwin reply to me:

Re: TRIPLE B.B TAIL ASSEMBLY

Hi Isaac,

I need the address again where to send it too. BTW I sent it the first time because I did it myself... I may be old but I am not burnt out yet....close..

it is the small black CNC spacer....

Irwin

Please contac Irwin with your address........ maybe, since what he send you the firt time was a little envelope with the washers, the panamenian mail office lost it. You know how is the mail in our country.

Isaac


.
09-17-2006 Over year old.
 
 
gkoutsis
Key Veteran
Location: Greek stuck in Belgium

I think we need to persudate Budd from Quick UK, to produce a few Sceadu parts. It looks like Raptors get all the good stuff (metal tail grips with thrust bearings and metal tail case)

George
09-18-2006 Over year old.
HOMEPAGE  
 
 
cebc7
Senior Heliman
Location: Panamá, Rep. de Panamá

Hi Isaac. Thanks for your help on this matter. I would like to clarify that I did wrote to Mr. Irwin several times. Ref. to Panameian mail, you know I always ask my helis, parts and accesories through them and never lost a thing. Are you a QWW shareholder??
09-18-2006 Over year old.
 
 
thebignickey
Senior Heliman
Location: Marietta, GA

Had a grip break on me in flight i was running the freya blue tail blades with the speed up pully i have put the MA tail in my EVO and all is well
09-19-2006 Over year old.
 
 
cebc7
Senior Heliman
Location: Panamá, Rep. de Panamá

Spacers received.

thanks
10-10-2006 Over year old.
 
 
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HIROBO Freya - Sceadu - Shuttle > Scaedu 50 Lossing tail blades in the air...........
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