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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsOther › RJX head setup help
04-30-2011 12:14 AM  10 years ago
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Diego

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Oviedo or Cartagena, Spain

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RJX head setup help
Hi guys,

I´m doing something wrong installing a RJX flybarless head on my trex 600, i´m using Align´s 3g main shaft with this head, but a i cant´t get the geometry right. I´ve got lots of negative pitch 30º and only 7º positive.

As you can see in the pics i have to place the lock ring with the A arms against the head base to get some positive at all, if i put it where it should be and have 90º between it and the A arms at 0º pitch i get no positive at all, it seems like the linkage rods are too short, but at 70mm they are at the correct length.

Where am i screwing up?

Thanks,

Diego
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04-30-2011 12:28 AM  10 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Either redrill and lower the head on the shaft or get longer links. I would suggest the first.Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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04-30-2011 12:41 AM  10 years ago
Diego

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Oviedo or Cartagena, Spain

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Look at the picture on the right, the swash is all the way to the top, no amount of drilling will fix that.

The only solution i see is longer pushrods.
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04-30-2011 12:51 AM  10 years ago
cudaboy_71

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sacramento, ca, u.s.

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at collective midstick, the swash should be at the midpoint of the available mainshaft throw AND the grips should be at 0°. once you get that everything else should work itself out. likely you'll need longer swash to grip rods.if it ain't broke, break it.
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04-30-2011 01:11 AM  10 years ago
Ronald Thomas

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Gainesville, Fl, USA

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Are those the Align links or the RJX ones that came with the head?Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
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04-30-2011 01:24 AM  10 years ago
Diego

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Oviedo or Cartagena, Spain

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i tried both.

The rjx ones are too thick at the bottom and they rub against the lower swashplate, also i´ve already broken two of them just trying to get them in, i don´t know if they have a specific side to go into the ball but they shouldn´t break just by getting them in. I´ll get a link resizing tool tomorrow and see if they are just too tight.

The head rods are too thick for the align links, and the align rods are too short.

So, very simple. nothing works and parts are not interchangeable.
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04-30-2011 01:43 AM  10 years ago
danieldouville

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Vacaville, Ca USA

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Align fbl rods
I had a similar problem with the rjx 450, I bought the 3G fbl rods and new links, they solved the problem. I used the top hole on the rjx head when I connected it to the Mainshaft.
Good luck!
Omnidirection shocks and pursuades my soul to ignite
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04-30-2011 02:24 AM  10 years ago
Raydee

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Western New York

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I just got my RJX head today for my Trex 450 pro....should I oder the Align Trex 450 FBL longer links??The Future of Nitro is ELECTRIC
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04-30-2011 05:19 AM  10 years ago
Kevin Feil

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Newnan, Georgia, USA

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RJX HEADS
Buy a Outrage head and be done with it.. Great product and simple to install and set up. No drilling or any monkey motion to get going.
" hollywood3160 "Team Synergy Factory Specialist, Team Futaba USA, Morgan Fuels
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04-30-2011 08:21 AM  10 years ago
Diego

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Oviedo or Cartagena, Spain

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Buy a Outrage head and be done with it.. Great product and simple to install and set up. No drilling or any monkey motion to get going.
Hey, that is the idea i was waiting for, after a couple of hours of tinkering i am ready to throw this head away and instead of getting longer push-rods i will get a new head. Time AND cost effective.

On other news, the RJX links do give the right distance when used with their push-rods, the two i broke was because i was inserting them backwards into the balls, i don´t think they are strong enough but hey, it was my fault, on the other hand when inserted right side in they are VERY easy to pull out... not too confident about that.

So the solution i see is to go buy the outrage head, get longer rods and links from align.

Thanks to all,

DIego
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04-30-2011 09:11 AM  10 years ago
baby_zyklon

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Singapore

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There is nothing wrong with the head or linkage rod. It is just a matter of the height of the head and length of the shaft that is giving you your problem. The head was probably designed for rjx heli main shaft with their linkage balls. There is no standard size for these.

All you need to do is to center the servos to let the swash sit at center. Then adjust the push-rod length to get 0 degree on the blades. Might need new rods.
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04-30-2011 02:41 PM  10 years ago
Thumpernator

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Senoia, Georgia, USA

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So the solution i see is to go buy the outrage head, get longer rods and links from align.
Just use the rods that come with the Outrage head. While you're ordering, order a spare set of Outrage linkage rods,,,, just in case you need them later.
Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk
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05-11-2011 01:53 AM  10 years ago
billeva

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kentucky

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rjx flb head 600
hey has anyone had trouble with head spindle bolts stripping
out on the rjx 600 head let me know thanks
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05-11-2011 10:01 AM  10 years ago
Diego

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Oviedo or Cartagena, Spain

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I got the Align 3g rods and links, they were the easiest to get.
The problem is the have lots of play, even on the Align swash.
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05-11-2011 01:49 PM  10 years ago
Kevin Dalrymple

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Indianapolis

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The problem is the have lots of play, even on the Align swash.
If you are using the stock Align 600N balls on the swash and the 3G links the stock balls are to small. Align uses a larger set of balls for the 3G stuff, that is why the links don't fit right. Align sells the larger balls, now you have to ask you self if you want the longer balls or short ones for more resolution?
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08-03-2011 08:32 PM  10 years ago
wannaheli

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Fairfax, VA

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What do most people go with for the RJX head? Short balls or longer balls? Also, would you go with the shorter balls on the inner ring and longer balls on the outer ring? Or longer balls on the inner ring and shorter balls on the outer ring? Or shorter balls all around?
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08-03-2011 10:39 PM  10 years ago
towertsk

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Chula Vista, CA

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I'm running the RJX head on my 600 with zero issues with the supplied links. Since the plastic ball link ends have "rjx hobby" on both sides it makes it difficult to see which side goes first.

If you look at the hold you'll see size differences. Rotate it 180 and look again for the smaller hole(it was obvious for me).

Prior this the RJX head I was using the ADK conversion. I like the RJX head since it lowers the disc.
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08-03-2011 10:45 PM  10 years ago
towertsk

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Chula Vista, CA

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dup
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08-07-2011 02:56 AM  10 years ago
Santiago P

rrProfessor

Dayton

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The RJX ball links are much longer that the ones on the picture. they will give you the correct rod+link length and the correct pitch range.
i tried both.

The rjx ones are too thick at the bottom and they rub against the lower swashplate, also i´ve already broken two of them just trying to get them in, i don´t know if they have a specific side to go into the ball but they shouldn´t break just by getting them in.
They are directional, in fact, they look identical to JR links.
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08-07-2011 01:28 PM  10 years ago
jbiter

rrKey Veteran

Sebring, FL

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Have you tried installing the head with the longer (original) mainshaft. I think the head was designed for that

Jeff
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