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e-Align T-REX 450-500-600 > IMPORTANT - SE Tail Hub - HS1127

Erich
Senior Heliman
Location: SouthernCalifornia

This is an important message for those of you that are flying the T-Rex SE or are using the newer style HS1127 tail hub. This is the tail assembly with the blue annodize grips. The screws holding the grips to the hub can break off in flight. Align is aware of this and is working to get replacement 2X9mm hardened screws out to everyone using the HS1127. Contact Andy at andy@alignrcusa.com and provide him with your shipping address. Andy is out of town right now, so be patient when waiting for a reply. He should have some new screws before the end of the week.

Erich Stolz

11-21-2005 02:41 AM

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MikeInMobile
Key Veteran
Location: Mobile, Alabama

It is not the screws that will break, but is the actual hub. Microheli has a replacement hub for this grip assembly that is made from steel and it even comes with new screws !

11-21-2005 02:45 AM

TheX
Senior Heliman
Location: Newport Beach, California

I was there today when Erich's broke and it IS the screws. Have you seen the new hub assy? It's not the same as the silver aluminum set.

11-21-2005 04:20 AM

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HELILAB
Senior Heliman
Location: Sunny Miami, Florida 33016

Are the screws breaking with the stock tail blades?

Mario

11-21-2005 04:28 AM

Ozydego
Key Veteran
Location: Westerville, Ohio

It sounds like Align thinks its the screws as well if they are sending out replacements.....

But Honey, I can't live with just stock.....

11-21-2005 04:46 AM

rcdaddy
Veteran
Location: Singapore

Mike is correct. The screws will not break. The hub breaks first and then it will pull the screws out of the hub. When it disappear one blade grip you find it again and the screws is still there. I got experiences with MH grips.

Get yourself a new steel hub, ..

but for SE anyone knows if MH steel hub can fit align new SE tail rotor?

11-21-2005 05:53 AM

laddy
Senior Heliman
Location: Midland Texas

This is not the Microheli hub. Read the post again. It is ALIGN's screw's on the SE hub. It is Aligns screws not Microheli HUB. It has nothing to do with Microheli's part.

11-21-2005 06:17 AM

rcdaddy
Veteran
Location: Singapore

I know i said it's same thing what happened to MH parts about 6 months ago. Align also got problems with broken tail hub with old versions. and this is also same problem. They need to get it fixed not changing the screws. it doesn't work.

11-21-2005 06:28 AM

Tmaster
Key Veteran
Location: Central Texas

I use different screw in the hub already. The stock align ones strip so easy on the hex button head. I dont use loctite so i need screws that are heavy duty for my tightening!!!

11-21-2005 06:34 AM

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JVBAV8
Heliman
Location: Honolulu, HI

mine came out on the second flight
broke the plastic ball off the metal slider too
the blade grip feathering screw broke off in the hub\ can't get it out

so I need a ball link for the slider
hub
and the new upgraded screws

Aloha folks
JVB
jvbav8@hawaii. rr. com

11-21-2005 07:35 AM

larren
Senior Heliman
Location: Malaysia

Hi,

Can we use the stock tail rotor hub screw to replace the HS 1127's ?

11-21-2005 08:17 AM

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Infarcted
Senior Heliman
Location: downunder

Guys ,you're getting me worried.What's the verdict?Hub or screws.

infarcted

11-21-2005 11:33 AM

jhodges68
Heliman
Location: Savannah, Georgia

Looks to me like from the diagram above that we have the ole "threads in bearing" problem. If the diagram is correct, the threaded portion of the screw crosses the interface between the grip and the hub. If this is the case, a longer shoulder will fix it. The treaded portion is not near as strong as the shoulder ... the diameter is less and threads cause a stress concentration.

Johnny Hodges
Savannah, Ga

11-21-2005 12:01 PM

Pitounet
Senior Heliman
Location: France

It is the screw. I have received this hub and didn't put it on as after having inspected it i thought the screws were too weak. The new hub cannot break, it is the screw that is the weak point of this part. Before even the first warning I have been watching for new ardenned screws. It is really strange Align didn't think of it befor since the former aluminium hubs were breaking at the same place. They should have thought that the screws should be very strong to hold.

11-21-2005 12:30 PM

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

Guys look at the assembly picture. In the new one the hub is completely redesigned and as Erich says, its the screws NOT the hub which is breaking here.

11-21-2005 12:39 PM

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rcdaddy
Veteran
Location: Singapore

Theorerically, the shoulder of the hub is the weakest point, now just like MH hub they always break at that point, now Align doesn't have that long shoulder like MH's, the force will pull the screws out and if the screw is weaker than the force, it will break, if you put a stronger screw on, it will not break but it will be PULLED out and it will SHOOT you

Believe it or not, put a better screw in and go full throttle, it will shoot the screws out with some aluminum burrs still on the new screws. If the aluminum hub is of good aluminum it will hold pretty good, if it's shi$ty aluminum, man, the threads will be gone in secs.

11-21-2005 12:46 PM

TheX
Senior Heliman
Location: Newport Beach, California

rcdaddy, I was there and saw the damage myself. The hub was perfect, and the screws were sheared off at the hub. The threads and hub were intact. Please quit spreading false or misleading information on this. Let me rephrase it one more time.

The screws failed where they joined the hub. The hub and the threads are FINE. If you could get an easy-out in there and remove the screws from the hub you could reuse it.

Once more, it's the SCREWS!

11-21-2005 12:52 PM

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rcdaddy
Veteran
Location: Singapore

TheX,

Did you read my post correctly?

I said if the screw is not good, it will break itself, if the screw is good it will not break but something has to give in, that will be the thread.

Put a new screws in and give it a full throttle and you will see what i mean. I saw it myself too with MH rotor.

11-21-2005 01:03 PM

WRXRonald
Key Veteran
Location: aurora, OH

wow?

do you guys actually bother reading the former posts?

it seems like despite that ALL the posts i've read in this forum so far are quite clear as to what is being discussed, the following post after each new is confused or unclear or in misunderstanding of what the former post said?

geez!

take your time, read carefully what peops are saying.

Clearly we know Align made a new hub to be stronger/better so the hubs would stop breaking in flight.

In doing this they FORGOT about the lousy material screws they were using and now because the hub is strong enough NOT to break, the screw is approaching a failure point before the hub can.

we DO NOT know what the failure point of the new hub is, OR if it will actually support our headspeed, because it HASN'T had a chance to prove itself yet due to the screws being the weakest link currently.

RCDaddy has just speculated that he thinks the NEW Align hub will continue to fail (for a completely different reason than the old hub design) once we get strong enough screws in place.

just to be sure RCD: you're thinking the threads will NOT be strong enough to keep the screws in place and will just pull right out along with the screw itself and the blade will as you said "shoot at you". ?

well, we'll see. Hopefully as you said they used a better quality aluminun (not just anodized for added strength) and the threads will hold once we put strong screws in place.

TheX, what headspeed was the Trexy running when you watched it fail? just curious?

for the record.... Duzi tail (i know some have commented on how tiny the 'hub-nubs' look that hold the blade grip screws and that it will 'break for sure'..... i've now flown it a good bit (multiple packs) and crashes for that matter (bending tail shafts, shearing CF tail blades, snapping a CF boom and breaking the horz fin)..... NONE of these incidents including running with CF tail blades and a headspeed of 3000rpm has damaged or caused failure in the DUZI slider. it seems so far that this slider, while very expensive, is worth every penny! i'm very pleased with it so far and can't believe the little parts have not bent or broken in some of the 'tail intensive' crashes i've had in the last 3 weeks.

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical error. Every Day: CRASH :)

11-21-2005 01:29 PM

TheX
Senior Heliman
Location: Newport Beach, California

wrxronald, here is what rcdaddy said, word for word,

Quote
Mike is correct. The screws will not break. The hub breaks first and then it will pull the screws out of the hub. When it disappear one blade grip you find it again and the screws is still there.

I'm not misreading anything here. Here is a quote from further down in the thread,

Quote
if you put a stronger screw on, it will not break but it will be PULLED out and it will SHOOT you Believe it or not, put a better screw in and go full throttle, it will shoot the screws out with some aluminum burrs still on the new screws.

BTW, I did bother to read the former posts.

11-21-2005 01:52 PM

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e-Align T-REX 450-500-600 > IMPORTANT - SE Tail Hub - HS1127

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