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E-flite . Next D . Fast Lad Performance

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e-Align T-REX 250-450-500-600 > IMPORTANT - SE Tail Hub - HS1127
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

I decided you guys needed some pictures to help you see my ideas.



Lets review a few things about these pictures.

First, the silver screws are the weak ones, and the black one is one of my replacements. I decided since the silvers were extra I would break one or two to see how weak they really are and where they break...

Next, They broke pretty much right at the top of the threaded area both times.... try it yourself, the screws are kinda crappy anyway.... I used two pairs of pliers.... The next thing I noted is that the threaded area is the same diameter as the shoulder with the silver ones. I compared this to the diameter of the replacement screw and whadda ya know, they are the same diameter... I even overlapped the two in that last pic for those skeptics....

The last thing I noted was that the screws are in fact the exact same length, just the head on the new screw is thicker....

I say before you say my ideas are crap, you do some research yourself, so you don't look like as much of an idiot to the rest of us.

But Honey, I can't live with just stock.....
12-14-2005 04:13 AM
 
 
Tmaster
Key Veteran
Location: Central Texas

The screws don't need to be partially threaded (shoulder). Fully threaded is fine as long as the threads are the same diameter to fit in the inner race; just like Ozydego said. The inner race of the bearing doesn't move! There is no point in having a non-threaded area on the screw. The screws lock the inner race down from the outter top and bottom of the race hole! The screw doesnt move, and the inner race doesnt move.

IF there wasn't bearings in there then i would say you need to have partially threaded screws, with grease.
12-14-2005 04:37 AM
HOMEPAGE  
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

Quote 
I say before you say my ideas are crap, you do some research yourself, so you don't look like as much of an idiot to the rest of us.


Never said your ideas were crap, just that you were humorous. However if it makes you fell better to call me an idiot, then meet on the playground after school and we'll tutor you on ME fundamentals. They are just cheap bolts from the land of knock-offs after all.

Merry Christmas

Cheers - Boyd
AMA80393
Major USAF
Retired
12-14-2005 01:43 PM
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

yup.... just cheap bolts, but its nice to see that you've changed your tone a little....

But Honey, I can't live with just stock.....
12-14-2005 06:15 PM
 
 
Kevino_heli_man
Senior Heliman
Location: Valencia, CA United States

I think you guyes should fight it out. Just kidding, can't we all just get along. I just wanted to say thanks to andy for sending me the screws. I got them today and just wanted to know, IS THERE ANYTHING ELSE YOU NEED TO GET FOR THE TAIL? I keep hearing people talk about the hubs being bad and this and that. Is there any other parts that I sohlud worry about?
12-14-2005 11:46 PM
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

Another thing that is kinda crappy are the pressed carbon tail blades... the ones for like $4 buscks with the tapered ends... They are very brittle... The more expensive CF tail blades are better, for like $8 bucks a pop, but they don't explode in flight....

But Honey, I can't live with just stock.....
12-15-2005 03:41 AM
 
 
xJediXx
Senior Heliman
Location: Tucson, AZ

Wanted to thank Assurance R/C for getting my replacement screws out to me quickly. Rcvd mine today, sent out on Tuesday. Just to reiterate these screws are the fully threaded 2x9 black screws.
12-16-2005 08:09 PM
HOMEPAGE  
 
 
rcdaddy
Veteran
Location: Singapore

i see Align now comes with Steel hub too
12-17-2005 07:14 AM
 
 
xJediXx
Senior Heliman
Location: Tucson, AZ

I bought that steel hub for $5.00, because I was nervous about an exploding tail.
But the fully threaded black screws do not fit in the hub w/o binding.

Anyone think the steel hub is still necessary or will the longer fully threaded screws solve the problem?

What screws have been used succesfully with this steel hub and which tail rotor holders were used?
12-17-2005 04:22 PM
HOMEPAGE  
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

The screws were the problem, the steel hub is for those that run the headspeed over 3000 rpm and had screws pulling out... The steel hub is aligns answer to MH's steel hub....

But Honey, I can't live with just stock.....
12-17-2005 04:48 PM
 
 
TheX
Senior Heliman
Location: Newport Beach, California

Yep, if people read this whole thread you'll see that the wcrews were indeed the problem, the hub is sound.
12-17-2005 08:41 PM
HOMEPAGE  
 
 
MikeInMobile
Key Veteran
Location: Mobile, Alabama

Run carbon tail blades and a high headspeed and THEN tell me that the screws were the problem !
12-17-2005 08:54 PM
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

Mike.. my last post right up there was just for you buddy... For those running insane headspeeds... and I'm jealous

But Honey, I can't live with just stock.....
12-18-2005 12:14 AM
 
 
MikeInMobile
Key Veteran
Location: Mobile, Alabama

Ozydego,

When are you going to bite the bullet and go for the gusto (Extreme Headspeed)?

The increased headspeed does away with the instability of the micros, and dramatically increases the cyclic reaction speed . Unfortunately, woodies can't keep up with high headspeed, but the Maverick carbons just keep on singing !
12-18-2005 12:43 AM
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

Time for a fenestron tail enclosed in an Aramid/Kevlar shroud so that the bits will be easy to find and won't require an ER Doc to remove them from your face and neck. JK - (well only a little).

Merry Christmas all.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-18-2005 03:22 AM
 
 
TheX
Senior Heliman
Location: Newport Beach, California

MikeInMobile, I do. Do you own this part? The ones that broke causing this thread were done in Anaheim by Erich and a few of us were there watching it. He was rocking and rolling and the SCREWS FAILED. I'm sorry, I guess you would know more about this particular part eh? Got pics of the hub you destroyed?
12-18-2005 03:32 AM
HOMEPAGE  
 
 
yrag
Heliman
Location: Somerset UK

advize please

At the very start of this topic there is a picture of a assembled tail section with 2 black threaded screws.

I have just got a new SE and it has screws like the ones in the picture. So are these the dodgy screws or the new good screws. ?


Ta
G
12-18-2005 09:47 PM
 
 
MikeInMobile
Key Veteran
Location: Mobile, Alabama

I never use the stock screws with the Align tail hubs .... I used grade 11 SHC screws cut down on mine ...... the hub breaks where the screw stops. Since I started using the new steel microheli hubs, I haven;t had a hub failure (still using grade 11 shc screws with the MH hubs). When i saw that everyone thought that the screws were the problem, I laughed since I wasn;t using the stock screws anyway (the stock screws were extremely soft and I knew that they wouldn't hold up to the pressures).

The problem when using carbon fiber (not the cheaper carbonized plastic) tail blades.IS the hub. Aluminum cannot hold up to the continuous forces exerted. Since the aluminum has no elasticity, it cracks. By using steel, the strength is placed onto the hub, where it belongs. A cylinder has a natural strength due to it's shape. Even when tapped, the strength is still there.

A word of caution ...... do not reley on the screws to absorb all of the pressures exerted by carbon tail blades .....they WILL eventually fail (and usually at the WORST possible moment). Use a steel tail hub whenever possible and just avoid the issue completely !

The hubs that I have destroyed have been discarded, but ALL of the failures occur within 1/10th of a mm from the end of the screw. This is the point where all of the pressure is placed by the hub.
12-18-2005 10:39 PM
 
 
xJediXx
Senior Heliman
Location: Tucson, AZ

MikeInMobile - Aside from th MH hub you mentioned; what tail assembly are you using? HS1127? I get a lot of binding with that hub, no matter what asembly I use. Just curious.
12-18-2005 11:55 PM
HOMEPAGE  
 
 
Ozydego
Key Veteran
Location: Westerville, Ohio

yrag.. the screws without the shoulder on them are the new ones.. the silver ones are the old ones.. compare these two screws...

The black ones are the new fixed screws... you will prolly have to take the bad ones out and substitute in the new ones...

But Honey, I can't live with just stock.....
12-19-2005 12:02 AM
 
 
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Ace Hobby . Esprit Model . Thunder Power RC

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e-Align T-REX 250-450-500-600 > IMPORTANT - SE Tail Hub - HS1127
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