RunRyder RC
 7  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2887 views
Helicopter
e-
Elec-Helicopters New or Limited Activity
Ark › CNC metal Upgrades Parts should be recalled!! Do Not Buy them!
11-29-2005 03:45 PM  12 years agoPost 1
upperking

rrApprentice

Spring Hill, Florida

My Posts: All  Forum  Topic

They Better FIX THIS PROBLEM for reputation sakes.

The metal grips are made incorrectly DO NOT BUY THEM!!
The Bearing bore hole is to big for the bearings and causes unacceptable slop causing a dangerous heli
These parts need to be recalled!!!
This is poor workmanship from the company that made these and that are selling these!
I can not believe that they are still selling these and have not fixed the huge problem!
Do these companies know how to measure?

This forum is full of complaints about these upgrade problems, enough said!

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
11-29-2005 08:20 PM  12 years agoPost 2
bird1100xxy

rrNovice

Swindon, UK

My Posts: All  Forum  Topic

Here! Here!, I fully agree. I have two sets of CNC main blade grips that could do with a recall.

PM  EMAIL  Attn:RR  Quote
11-29-2005 09:40 PM  12 years agoPost 3
JerryLu

rrApprentice

Gretton, Northants - England

My Posts: All  Forum  Topic

Well I am going to go the other way.

Ok, they are not perfect but pricewise, compared to the microheli parts they are much cheaper and with a bit of care and sorting they work perfectly well.

My blade grips work perfectly now with my polythene mod.

Jerry

PM  EMAIL  GALLERY  Attn:RR  Quote
11-29-2005 10:56 PM  12 years agoPost 4
skeppley

rrVeteran

Auburn PA

My Posts: All  Forum  Topic

All of this has beem discussed months ago in many threads here and at RCgroups.
Everyone has always said to buy all the upgrades EXCEPT the CNC Main Blade grips and CNC Tail Case. It's been gone over and over.....so.....

WHY WOULD YOU GO AND BUY THEM!!!


They are not needed, fit poorly, and just add weight. I have every upgrade there is except them, and the heli flys great. It also fly's great with no upgrades at all.

If i had them, i personally would call the vendor i got them from and return them.

Like JerryLu mentioned, if you want them, there are ways to make them work, but with the TREX plasic and CNC Grips working so well, just upgrade to those instead..

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 12:25 AM  12 years agoPost 5
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

skeppley, I just got the CNC Tail Case, whats the problem with it? Did not find it on prior post.

PM  EMAIL  Attn:RR  Quote
11-30-2005 02:10 AM  12 years agoPost 6
skeppley

rrVeteran

Auburn PA

My Posts: All  Forum  Topic

ATRR,
from what i remember, the tail case had a loose fit on the boom, and to make things worse, has no anti rotation pin, like the plastic unit, to keep it from rotating on the boom if it became loose or experienced vibes or possibly even sliding front or back on the boom.

There may have been other things, but at the moment, i cant recall. I just know there was a reason i never got it when it was released.

It is certainly not as bad as the main blade grip bearing bores.

Please try yours and keep us posted on the fit. Also check to see how the bearing fit is.

I may just get one to see. I would tap the side and put a antirotation set screw in that goes into the stock boom hole just to be safe.Also scuff up the boom with some sandpaper and/or put some tape around the boom to give the tail case some grip.

Like I said,
Please keep us posted on the fit of the Case, I am very interested to hear your results.

Shane

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 05:13 PM  12 years agoPost 7
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

Shane,
I installed the CNC tail case, everything seems ok, but the belt is a bit tight due to the length of tail case causing the belt to stretch. Your right about the antirotation pin, its all smooth. The screws seems to hold it tight. I'm almost done building the kit which is also with the ccpm upgrade. Anyone know of a fix to correct the anti -rotation guide from getting in the way of the servo arm on the bottom? I made the servo arm fit, but the movement is limited. Will test fly this baby soon.

PM  EMAIL  Attn:RR  Quote
11-30-2005 11:14 PM  12 years agoPost 8
spool-it-up

rrApprentice

Oakwood Hills ILL..

My Posts: All  Forum  Topic

A

Recheck that servo position.

Mine does not hit with any elev. movement.
I did play with the servo pos, forward and back
but clean movement here.
ccpm version MX-400


John

PM  EMAIL  GALLERY  Attn:RR  Quote
12-01-2005 12:34 AM  12 years agoPost 9
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

John,

I tried different movement on servo arm, but the length of rod hendered the arm movement. Ending up cutting the arm and installing to the inner servo arm hole which now limits the full tilt of swash. Is your control rod in straight vertical position and which hole on the servo arm?

PM  EMAIL  Attn:RR  Quote
12-01-2005 08:28 AM  12 years agoPost 10
JerryLu

rrApprentice

Gretton, Northants - England

My Posts: All  Forum  Topic

Antirotation guide

If this gets in the way of your servo arm, turn it round.

Then replace the guide pin with a longish 2mm screw with a length of brass fuel tube fitted between the head and the swash. You may need to ease the guide so it does not grip the new pin too tight.

I recommend you use a lock nut behind the swash arm and don't gotget to use threadlock (if you have the metal swash) on all the ball screws. They are not locked on the factory and will fall out if you don't

See my gallery for pics.

Jerry

PM  EMAIL  GALLERY  Attn:RR  Quote
12-01-2005 04:58 PM  12 years agoPost 11
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

Finally got the everything to work right. On test flight, found the tail shaft moves in and out (wide gap between gear and tail housing) on CNC tail. Tried adding washers but causes tail shaft to jam up. Need help on this problem. ARk needs to improve tolerences on their design they are lacking in this.

PM  EMAIL  Attn:RR  Quote
01-11-2006 05:27 PM  11 years agoPost 12
JerryLu

rrApprentice

Gretton, Northants - England

My Posts: All  Forum  Topic

You should have 2 very small washers, one either side of the belt cog. They should have been part of the metal tail gear set.

I had mine apart last night replacing a bent shaft

Jerry

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2006 02:43 PM  11 years agoPost 13
BARKING SPIDER

rrNovice

Burnaby , BC CANADA

My Posts: All  Forum  Topic

I did this polythene mod and it works great with the cnc main blade grips. Had about 50 fights since I did it and the blade grips still have no slop.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2006 05:10 PM  11 years agoPost 14
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

JerryLu, mine did not include the washers you indicated nor was it mentioned on instruction.

PM  EMAIL  Attn:RR  Quote
01-13-2006 05:23 PM  11 years agoPost 15
JerryLu

rrApprentice

Gretton, Northants - England

My Posts: All  Forum  Topic

ATTR

I know Ark is not very good at quality control of parts included but I definitely have 2 small washers in my set-up, one either side of the belt sprocket. They are 3mm ID x 5mm max OD and probably about 0.5mm thick. (not sure 'cos I'm still at work) If you want I will measure them and confirm sizes. The washers need to be narrow so they do not bind on the shaft bearing outer race.

I did look to see if I had some spare from the original plastic tail box but there are none so I think they must have come with the alloy box.

Hope this helps.

Jerry

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2006 09:23 PM  11 years agoPost 16
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

JerryLu, I don't see it on the ark catalog for the washers. Can you please give exact dimensions? Thx

PM  EMAIL  Attn:RR  Quote
01-14-2006 05:00 PM  11 years agoPost 17
JerryLu

rrApprentice

Gretton, Northants - England

My Posts: All  Forum  Topic

I had to take my tail case apart to measure

The washers are 3 x 4.5 0.5mm thick (0.1195" x 0.176" x 0.0195" thk)

The bearing inner race OD is 5mm and the outer race ID is 6.6mm so the washer safely can be any OD from 4.5 to 6mm I would think.

One thing I found as a result of taking the case apart again was that one of the bearings was not fully seated (they came already installed, as you may know) so when the parts were fully tightened there was some binding. Tail shaft spins freely now I have seated the bearing properly. What this could mean for you is that if you push the bearings toward the inside that 1/2mm each, you will take up the play without needing the washers. I think they are sufficiently tight in the sides not to move but even if they do it won't be such they can fall out - as long as you have the flanges on the inside

Thanks for the thanks, Barking.

I fitted the metal tail blade grips and now have another problem. As there is no flexibility in these the tail pitch lever setup acts like an over centre switch because of the fixed length of the pitch control arms. Does not want to move easily in the centre and flicks hard left or right. I'm now going to have to upgrade this to the latest metal one for the Trex which has hinged levers - more expense

Jerry

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2006 02:14 PM  11 years agoPost 18
upperking

rrApprentice

Spring Hill, Florida

My Posts: All  Forum  Topic

I think what im going to do is buy the cnc metal tail parts and the grips that are new for the ark 450 that is coming out. they might have improved upgade parts in this new version

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
01-17-2006 05:31 PM  11 years agoPost 19
ATRR

rrNovice

California,USA

My Posts: All  Forum  Topic

Upperking, my heli is the new imporved version; my tail blade blew apart and landing gear broke,tail support plastic cracked,tail control rod guide broke. Never crashed only hovered on two flights. They called it improved huh?

PM  EMAIL  Attn:RR  Quote
01-17-2006 09:12 PM  11 years agoPost 20
upperking

rrApprentice

Spring Hill, Florida

My Posts: All  Forum  Topic

The ark 450 is not even out yet...??!?

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2887 views
Helicopter
e-
Elec-Helicopters New or Limited Activity
Ark › CNC metal Upgrades Parts should be recalled!! Do Not Buy them!
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Saturday, December 16 - 5:29 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online