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Old 05-25-2011, 08:29 PM   #1
Finless
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Default Review/Assembly KDE Trex Tail Upgrades

KDE has some new upgrades out which can be a little technical to install. The Trex700 tail control system and the Trex 550/600/700 High Performance tail upgrade.

KDE asked if I would review them and show you all how to install them on your Trex700. No problem! I love KDE stuff

So on with the show. The videos are in 3 parts.

VIDEO LINK -> Part 1 - KDE Trex Tail Disassembly and Assembly of the Upgrade Tail Slider (96 Megs)

VIDEO LINK -> Part 2 - KDE Trex Tail Control Upgrade Assembly (54 Megs)

VIDEO LINK -> Part 3 - KDE Trex550/600/700 Performance Tail Upgrade Assembly (50 Megs)


Enjoy folks!

Bob
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Last edited by Finless; 05-25-2011 at 11:10 PM..
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Old 05-26-2011, 09:18 AM   #2
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Hey Bob,

That was great, thank you for the videos! You did an excellent job explaining all the finer details of the install and noted all the things to watch out for during each step. It's easy to see why you are the leader of RC Helicopter videos, you have the talent.

I'll look into the Bearing Holder upgrade and the internal sleeve. As a quick note, rather than trying to use a Soldering Iron to heat the components, a Heat Gun or Butane Torch is a much easier method to use. The team and I simply use a Heat Gun (a cheap one purchased from a local hardware store used to heat shrink-tubing) to heat the Aluminum housing of the Bearing Holder. Once the Loctite gets to the right temperature, it will liquify and the bearings will pop out quite easily without having to damage the bearings. In a pinch, a Lighter also works well at the field.

Then, you can choose to use "The Greaser" to regrease the original bearings, or toss them aside and use the new ones supplied in the kit.
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Old 05-26-2011, 10:35 AM   #3
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I used a soldering iron because that is what most people have. I try to show how to do things with the most common tool. I do have a pen torch and yes I do use that myself for this kind of stuff. Just wanted to show people how to do it with something most everyone has. Yes for the slider the lighter also worked as I showed in the vid. Even then getting a tool on the tiny lip of the inner race past the spacer was a bear. But this is true for many things like getting the bearings out of blade grips etc.

FYI folks in the beginning I said I was going to show the boom supports and take them apart. DONT DO IT! They do not come apart. This is why I did not show this at the end like I said I would.

So just FYI there.

Bob
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Old 05-26-2011, 04:42 PM   #4
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Hey Bob, thanks for the nice vids.

Similar to the Outrage design which I liked on the Velocity.
Will be interesting to know if you can notice any difference in flight in case you had problems with your tail.
Maybe dumb question, did adding a bunch of bearings and ali and screws far off the CoG affect it or is it too small to make any difference?
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Old 05-26-2011, 05:15 PM   #5
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Do they make the tail control system upgrade for the 600 or just the 700?

Looks like a nice and needed upgrade.

Craig
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Old 05-26-2011, 06:30 PM   #6
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if they make one for the 600, it should also fit the mikado.

the stock 600 slider works on the logo.

i'll take one.
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Old 05-26-2011, 07:18 PM   #7
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I don't think on a 700 there will be any noticeable difference in CoG honestly. Haven't flown it yet but I bet I wont notice much in that area. I think this tail upgrade will simply be easier on the servo and more reliable as far as wear and building slop. My bell crank was getting pretty loose on the slider ball which is a problem with Aligns design over time. With this upgrade I don't think this will ever build slop unless the bearings wear out.

Bob
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Old 09-14-2011, 02:42 PM   #8
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Old 09-14-2011, 03:24 PM   #9
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Quote:
Originally Posted by kegerator View Post
---
Brain fart? What happend?

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Old 09-14-2011, 04:57 PM   #10
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Sorry, wanted to correct this before posting again...

Hey Guys -

I was just helping a customer who had a distinct tail wag that he could not get rid of. He had installed the AT700-PTC-V2 design on his brand-new TREX 700E V2 3GX to try and get rid of the tail wag, and no luck. We tried replacing the tail servo, changing settings in the 3GX, and all of these wouldn’t cure the issue…spent a few days and many e-mails looking into this...

Well, turns out there is a design-flaw in the new ALIGN V2 Metal Tail Rotor Holder assembly released separately and with the new "V2" 3GX kits. In the new stock design, a dual-radial bearing is added to further support the tail (similar to the PTU upgrade, just different bearing ordering). What the designers missed is a critical spacer that goes between the outer radial-bearing and thrust-bearing to prevent lockups. Similar to the Main Rotor Assembly, this spacer is critical to prevent the inner-race and the outer-race of the radial bearing from contacting the thrust-bearing washer at the same time. Without the spacer, the assembly may feel smooth on the bench, but once the axial loads are imparted by the centrifugal force of the tail blades, it will lock up in flight and cause severe tail wag issues. Essentially, both the inner and outer thrust-bearing races are locked, and excessive forces are needed to turn the assembly in flight - producing the problematic tail wag.

For the customer, he installed an older ALIGN V1 Metal Tail Rotor Holder he had available with the KDE Direct PTC/PTU-V2 upgrade assembly and the wag immediately disappeared.
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Old 09-15-2011, 11:14 PM   #11
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Hello kegerator!

What if I'm using this assembly:

http://www.ebay.com/itm/270814908870...ht_2960wt_1037

Still have the problem?

Thx

S
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Old 09-16-2011, 09:59 AM   #12
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Quote:
Originally Posted by smaze17 View Post
Hello kegerator!

What if I'm using this assembly:

http://www.ebay.com/itm/270814908870...ht_2960wt_1037

Still have the problem?

Thx

S
Same one i've ordered, these should be OK
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Old 09-17-2011, 09:34 AM   #13
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Another freak in the 700E forum had the great idea and fitted 450 Pro main shaft shims between the radial and thrust. I tried it this AM and fits perfect. Now just need some testing.


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Old 09-17-2011, 09:40 AM   #14
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I thought I found where to buy just the shims but it looks like they were the wrong size. Only way to get the Align spacers is to buy the 450 pro main shafts it seems.
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Old 09-17-2011, 11:00 AM   #15
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http://www.helifreak.com/showthread.php?p=3252218


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Old 09-17-2011, 09:02 PM   #16
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Sorry guys I'm lost here. I just bought the V2 tail assembly for my V2 700. What is the mod I should be doing to eliminate wag? Can I simply buy a KDE upgrade to take care o the problem?

Thanks for helping this knucklehead

S
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Old 09-17-2011, 09:05 PM   #17
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Quote:
Originally Posted by smaze17 View Post
Sorry guys I'm lost here. I just bought the V2 tail assembly for my V2 700. What is the mod I should be doing to eliminate wag? Can I simply buy a KDE upgrade to take care o the problem?

Thanks for helping this knucklehead

S
Maze - No one really Knows Yet. We have theories about the shims, but untill we get a few positive reports back, pretty non conclusive.

The KDE Upgrade does not solve the problem.
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Old 09-17-2011, 09:27 PM   #18
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I cant believe Align messed this part up? Maybe they just forgot to package the shims in the V2 tail kits?

Bob
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Old 09-17-2011, 09:57 PM   #19
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Not to mention they put tail blade bolts in that are too short to go through the plastic of the lock nut. 2 problems with this product.

I had to order 2 18mm bolts because the 16mm that come with it are too short.
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Old 09-18-2011, 03:58 PM   #20
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Quote:
Originally Posted by In_to_the_Mystic_2003 View Post
Maze - No one really Knows Yet. We have theories about the shims, but untill we get a few positive reports back, pretty non conclusive.

The KDE Upgrade does not solve the problem.
Ok thanks man. Guess I will just take my time assembling the 700 and see what transpires

Thanks

S
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