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Ark › X400 Kit quality, dissapointed.
05-06-2005 02:52 PM  12 years agoPost 1
MrMel

rrProfessor

Gotland

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I just finished building a X400 kit and I must say I am dissapointed of the quality of the parts.

Might got a bad kit.. but hey..maybe not?

- Tail gear part of main gear was bent ot of the box, so main gear touches each other + a bad wobble.

- Head un-balanced, one of the collar was larger then the other.

- At least 3 screws when screwing into plastic parts never took hold, hole was too big from the beginning, same thing with a few of the ball-links.(no I didnt overdo them.., was bad from the beginning)

- General quality of plastic parts not too good, many excessive plastic left on from molding.

- Half of the ball-links binds hard, half is perfect, no problem to fix it, but why isnt all the same?

- Swash binds to the main shaft

- Swash too stiff (gonna try soldering iron trick), so probably fixable.

- Canopy was pushed down in the kit, and was pretty misformed, maybe it will "adjust" it self, but maybe not.

- Got two bags with parts that had 1 screw to many in them.
Not a problem, but took a while when building to check, recheck, tripple check why I had parts leftover..


Is it just my kit that is bad?

I bought two kits to start with so I gonna check the other one.

- Fredrik

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05-06-2005 03:17 PM  12 years agoPost 2
jaseyshef

rrApprentice

Sheffield, UK

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Mel,

I think you lucked out - I built mine about three weeks ago and it was very nice. Agreed on the extra screws though, it threw me a little but I just pressed on after a quick once over.

I don't like the metal tail rod - just bought the trex carbon to fix this though.

The aileron servo also catches on the canopy, but you can mount it underneath (after a little scalpel work on the plastic grommit) which solves this nicely.

Also I agree with some of the other forums now - the rotor hub is weak in strength terms, broken one already, but overall I'm very happy with the quality.

I did read early models suffered from mould flashes and also ball link size issues, but apparently this has been subsequently rectified.


Jase

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05-06-2005 05:46 PM  12 years agoPost 3
Gary Jenkins

rrElite Veteran

Nowhere, US

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I think I going to buy a Trex XL.

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05-06-2005 08:41 PM  12 years agoPost 4
MrMel

rrProfessor

Gotland

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To add to my list

Landing gear holder broke when screwed them to there place.
(snapped above the hole)

But most annoying of all.

When mounted the servo I could see that elevator control was so sloppy, when checked i could move the elevator arm about 5 mm (!) without anthing else moved, the shaft that goes out from the elevator lever connection to the arm with the shaft with the two cut sides in them is so sloppy that this bird will never fly in the condition it is... bah..

Ready for thrashcan?

I checked my other kit, equally poorly made..

Gonna drop some CA on it and see if I can at least fly it for once.

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05-06-2005 09:28 PM  12 years agoPost 5
ATRR

rrNovice

California,USA

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Thanks for the info.......I'll wait till version 2 comes out.

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05-07-2005 01:27 AM  12 years agoPost 6
MA Boy

rrApprentice

London

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thats a shame . Sounds like you got unlucky. My x400 went together perfectly, not one problem, however I also got the extra screws, i just considered them to be spares and carried on building with no problems.

MA enthusiast

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05-07-2005 01:36 AM  12 years agoPost 7
ozace

rrKey Veteran

melbourne, australia

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not unlucky, I have the same here. It seems unlikely that 3 kits on different sides of the world are the only bad ones.

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05-07-2005 03:06 AM  12 years agoPost 8
MA Boy

rrApprentice

London

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which problems did u encounter?.

MA enthusiast

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05-07-2005 03:55 AM  12 years agoPost 9
ozace

rrKey Veteran

melbourne, australia

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I got shocking quality gears, the tail belt gear is way off centre, the mixing arms are so soft i cant use them, tere were a couple of missing pieces.

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05-07-2005 06:00 AM  12 years agoPost 10
WRXRonald

rrKey Veteran

Auburn, OH

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bummers kids...
sorry to hear its all that sloppy..... Mel... how'd it fly i'm curious.. i seen numerous posts about peops going on how great it flys, how its so much better than trexy...

i guess i had my fair share of troubles with the stock trexy... but i'm totally please with the initial platform i had to workwith, and the upgrade route was not hard at all, nor was it terribly expensive either i don't think. and IMHO, eccpm flys with fantastic precision on this size bird.

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

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05-07-2005 06:31 AM  12 years agoPost 11
littlepiston

rrApprentice

Carlsbad, New Mexico

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just finished building a X400 kit and I must say I am dissapointed of the quality of the parts.

Might got a bad kit.. but hey..maybe not?

- Tail gear part of main gear was bent ot of the box, so main gear touches each other + a bad wobble. no biggy it will werein

- Head un-balanced, one of the collar was larger then the other.

- At least 3 screws when screwing into plastic parts never took hold, hole was too big from the beginning, same thing with a few of the ball-links.(no I didnt overdo them.., was bad from the beginning)add CA i had to add to one of them

- General quality of plastic parts not too good, many excessive plastic left on from molding.there was no flashing on my parts??

- Half of the ball-links binds hard, half is perfect, no problem to fix it, but why isnt all the same?yeah you need to use a balink resizer after all the hard work you will enjoy the crap out of it

- Swash binds to the main shaft

- Swash too stiff (gonna try soldering iron trick), so probably fixable.just spin it up with a dremal and be sure to glue it with CA

- Canopy was pushed down in the kit, and was pretty misformed, maybe it will "adjust" it self, but maybe not. caopy will be fine

- Got two bags with parts that had 1 screw to many in them.
Not a problem, but took a while when building to check, recheck, tripple check why I had parts leftover.. there for the servos you will have black nuts also lol i would not change out the metal rod for the tail as its working great for me in the stock servo mounting location

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05-07-2005 06:36 AM  12 years agoPost 12
littlepiston

rrApprentice

Carlsbad, New Mexico

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gyro gain 100%
http://www.rc-groups.com/forums/sho...t=349901&page=4

check out these pics im running 100% gyro gain and no wag the tail is super solid 2800 head speed trex flybar and paddles

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05-07-2005 09:29 AM  12 years agoPost 13
jaseyshef

rrApprentice

Sheffield, UK

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Mel,

sorry to hear about your probs mate, I really do think (and I think this may apply to the other guys as well) that you must have got an early version kit. X400 tuning say that the later kits solved a lot of the flashing problems and the like.

Oh by the way the elevator linkage- I had the very same problem and against my better instincts I retightened the screws for the main linkage quite tightly - solved it on one,no slop and nice precision on the swash.

Give it a go - may help.

My machine flies really nicely,floats arounds and has nice precision.

I am comsidering swapping out the align hh gyro for a gy240- anyone got any comment on this?
Jase

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05-07-2005 01:53 PM  12 years agoPost 14
derrickbwg

rrApprentice

Lexington, Kentucky

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is the roll rate as slow as everyone is stating?

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05-07-2005 02:12 PM  12 years agoPost 15
MrMel

rrProfessor

Gotland

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If I got a "early" kit, then all the US suppliers are selling them now...
Ive order several kits from diffrent suppliers all of them are junk.

Ive spent ALOT more time on this bird then I did on my stock t-rex, and I still cant get it to fly, there is soo much bindings everywhere.
(hovered at 2" yesterday, and had virtually no control..)

I thought after reading reviews that If I want a good stock heli, buy a X400, oh so wrong I was.

I gonna fix it so I can hover with it, and I will hover it into the trashcan.


- Fredrik

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05-07-2005 10:24 PM  12 years agoPost 16
StrangeRanger

rrVeteran

VT

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I gonna fix it so I can hover with it, and I will hover it into the trashcan
I almost spit soda pop all over the screen reading that. It sucks you got crap kits, but I gotta say thanks for letting us know. I hate waiting, but for sure will wait for the XL. I'm so stoked for that to come out.
j

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05-07-2005 10:51 PM  12 years agoPost 17
MrMel

rrProfessor

Gotland

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To make an update, I actually got it flying today.

At hovering at 3 feet, the vibrations is so bad that fins in the tail fins wobble 1 cm up/down. (not the whole tail, just the fins)

At a closer look, the gear is sooo off center, that good mesh on one side, turning it half way around the motor spins freely gear completly away from the pinion, only way to get it to fly is to have super too much mesh and then its ok when turned 180 degrees.

Most annoying thing is this is one thing that I really cant "fix".

The x400 heli kits I got is a joke.

I gonna get the XL when released, but had high hopes for this x400, I am on vacation for 3 weeks, and needed something to do while away from my rexes at home.

I guess only thing to do is go down to the LHS and get a T-Rex kit or stay at the sim on my laptop...

Oh well, this is now the end of my ARK x400 experience.

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05-08-2005 01:19 PM  12 years agoPost 18
jaseyshef

rrApprentice

Sheffield, UK

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Mel,

I'm really sorry to hear that, the whole thing for me was a great experience, that kit must have been a dog,for the gear mesh to be so far off is inexcusable.

Lets hope Ark get some more kits out that are as good as the one I got, because the heli really is a dream to fly.

Still if the quality is as poor as you say, then who would blame you.

Enjoy the sim - Jase

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05-08-2005 01:32 PM  12 years agoPost 19
raptorheli2

rrElite Veteran

rip off britain and no changing it

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it seems all x400 kits have same niggles.

1. my elevator rod also moves. a drop of glue fixed that but if it ever needs to come off i'm not looking forward to it.

2. the gears are warped, seems no ones gears are straight.

3. the undercarridge on them all is weak. but it's better than the zooms and trex undercarridges. i tie wrapped mine to the heli. the x400 is ideal for this.

4. the head block looks weak. i broke mine during crash so i don't know how weak it actually is. will it fail in flight? anyone had this?

the way round this is a trex head block and re-arrange the flybar to suit.

5. the canopy does hit the ail servo, i have BB 371's and i don't think mounting it underneath will cure it. but i'll give it a go. the xl canopy will fix it anyway.

all in all i still think it's better than the trex. i don't have a trex but had a shot of them and seen the general parts on them for long enough at first hand.

there will be a metal head block out soon i'm sure and that will cure a lot of problems. perhaps it might be worth trying to beef up the std headblock in the mean time with some CA and carbon weave tape.

cheers


www.waterfoothelis.com

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05-08-2005 02:41 PM  12 years agoPost 20
derrickbwg

rrApprentice

Lexington, Kentucky

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So it's going to be another heli that needs upgrades/fixes to fly well...guess that sinks the "it's gggrrrreeaaaatttt right outta the box" theory everybody was preaching before there was air under the first skid. I'd still like to know how it handles in the air if anyone has gotten that far. I want a faster roll rate...not a beginners roll rate...is the x-400 capable of trex or quicker response?

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Ark › X400 Kit quality, dissapointed.
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