RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 795 views POST REPLY
HomeAircraftHelicopter
e-
Elec-Helicopters New or Limited Activity
Ark › Metal head options for the X-400
02-06-2006 02:41 PM  12 years agoPost 1
ISS Driver

rrNovice

Houston, Texas

My Posts: All  Forum  Topic

I'm looking to replace my stock X-400 head with a metal unit. So far it seems that most people are either going with a complete Align aluminum setup from the mixers up or adding the ARK metal head pieces to their current head.

It looks like I can go either way for about the same price but i have some reservations:

Align: If I buy all the parts to go into the Align metal head I still need to buy the spindle and probably a bunch of screws, washers, bearing here and there (right?) as I don't have a stock T-Rex head to start with.

ARK: I've heard issues about poor tolerances between the main grips and bearing, etc. I'm weary of plunking down money when a better option may be available.

Thoughts from those who've been there before?

-Aaron

PM  EMAIL  Attn:RR  Quote
02-06-2006 03:21 PM  12 years agoPost 2
Nac

rrNovice

Surrey, BC, Canada

My Posts: All  Forum  Topic

I just picked up a set of aluminum main blade grips. These are the ones packaged by Helimax not ARK. The bearings come pre fitted and are not loose. They appear to be ca'd in place.

PM  EMAIL  Attn:RR  Quote
02-06-2006 04:11 PM  12 years agoPost 3
Renegade

rrNovice

Hereford, AZ

My Posts: All  Forum  Topic

Hello..

I too just purchased the complete ALI metal head.. I got the bulk of the parts from Tedani, and the grips from Tower. After putting it all together, I noticed the grips had quite a bit of movement up and down, and to some degree, side to side. I tried to hover and adjust the heli, but blade tracking was impossible to achieve. The tracked blade either was about a half inch high, or a quarter inch low (all blades tried). After changing to some carbons and a set of align woodies, with no change to the tracking issues, I decided to remove the grips (both with washers from the carbons), and put the stock plastic grips back on. The tracking issues disappeared, except for the carbons (Go figure).

I took the bearings out of the metal grips, and though it took a bit of tapping to get the first bearing (outer) to unseat, the inner bearing literally slid out with very little effort. I used a set of dial calipers, and noted that the diameter of the outer bearings (the tight ones) was .317 in. The inner bearings measured .314 and .315 in. These measurements were repeatable after rotating the bearings a quarter of a turn (each bearing).

Has anyone else measured their bearings? Does anyone have the capability to determine if there is a taper machined into the grip where the bearings go? I would find that interesting, as to why the bearings are smaller on the inside of the grip (closest to the hub). Incidently, there was a red residue (locktite?) on the outer case of the outside bearings, but nothing on the inner ones.. and the inner ones seemed to have the most play. I'm thinking of putting the larger bearings to the inside (press fit using heat on the grips to expand them slightly) and using the poly-bag fix on the outer ones, or getting larger bearings from the plastic grips for the outer position.

Any thoughts or experiences with this?

Gravity can be a cruel mistress.. mock her and she will b***h slap you to the ground!

PM  EMAIL  Attn:RR  Quote
02-06-2006 05:02 PM  12 years agoPost 4
Soniq7

rrApprentice

Sacramento CA

My Posts: All  Forum  Topic

I read on here somewhere about pressing the bearings into the grips over top of a plastic parts bag to take up the slack. Sounds like it might work.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2006 09:21 PM  12 years agoPost 5
NTM

rrVeteran

Lloydminster, Alberta, Canada

My Posts: All  Forum  Topic

I'm running the ark stuff with align grips + feathering spindle. Works very nicely. Attention must be paid to eliminating slop during assembly of the mixer arms.
If I could do it all over again I would have just bought a trex se, would have saved money that way.

PM  EMAIL  Attn:RR  Quote
02-07-2006 03:42 AM  12 years agoPost 6
alvincfi

rrApprentice

Minnesota

My Posts: All  Forum  Topic

ISS driver wrote:
ARK: I've heard issues about poor tolerances between the main grips and bearing, etc. I'm weary of plunking down money when a better option may be available.
I'm curious where you heard this, is there really probs with ARK upgrades or possibly the Helimax ones from Towerhobbies. I'd like to hear from people who have done upgrades using the Helimax parts. I've heard of people using the Trex upgrades on the 400 but I'd kind of like the use the ark or helimax stuff.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-07-2006 06:43 AM  12 years agoPost 7
Terry1229

rrApprentice

North Idaho

My Posts: All  Forum  Topic

upgrades
I have the intire head on my X400 upgraded with the Ark metal upgrades, except the blade grips. I am using the Align[trex] plastic blade grips and spindal. This way I can use a bigger variety of main blades.
All the metal pieces seem to be very good.

Thanks: Terry

PM  EMAIL  GALLERY  Attn:RR  Quote
02-07-2006 11:23 AM  12 years agoPost 8
alvincfi

rrApprentice

Minnesota

My Posts: All  Forum  Topic

ditto
yeah, i did a search on the subject and it seems like that is a good way to go, but I did read one post that said the new helimax offerings are possibly fitting better unlike the earlier bearing problems. At least with the Trex blade holders its a bit easier to choose and find blade upgrades.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 795 views POST REPLY
HomeAircraftHelicopter
e-
Elec-Helicopters New or Limited Activity
Ark › Metal head options for the X-400
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Tuesday, June 19 - 5:32 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online