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HomeAircraftHelicopterMain Discussion › Blade track issue
12-31-2013 09:41 PM  4 years agoPost 1
AgentOrange

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Jacksonville, Florida

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Hey guys I have a quick question. I have a Trex 450 with a flybared head. in any mode I have about a about a 1/4 inch track spread. All of the links in the head a fixed links so I can't adjust them. I am not going to put a FBL head on it. I have also checked main shaft run-out and its good. I am at a loss. the only thing I can think to do is change blades. please help.

Trying not to put them in the dirt.

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12-31-2013 09:46 PM  4 years agoPost 2
Retired2011

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Lee's Summit, MO

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The links to your blade grips are not adjustable?
Isn't that how you would adjust tracking? I don't know much about flybars, but I've seen it done.

Chet

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12-31-2013 09:57 PM  4 years agoPost 3
kc8qpu

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sc

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My guess would be your blade grips are bent. Or possibly a link is bent.

Carpe Diem!!!

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12-31-2013 10:10 PM  4 years agoPost 4
BENTDABOOM

rrKey Veteran

west seattle

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no tracking adjustment rods? sounds like fixed pitch,have you crashed lately? does it have a head spindle?

CAUTION!!! politicians may be hazerdous to your well being

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01-01-2014 12:20 AM  4 years agoPost 5
smokey

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Raleigh, NC

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I don't know the Outrage Velocity 50 N2 FB head?

You should have two links coming off the swash that you can adjust. Have you checked the bearings in the blade grips? If the setup is dead on then try flexing the blades with your hands to look for any slop. I would pull both grips and check for any notchy bearing feel.

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01-01-2014 01:26 AM  4 years agoPost 6
AgentOrange

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Jacksonville, Florida

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I will check that out.

Trying not to put them in the dirt.

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01-01-2014 03:38 AM  4 years agoPost 7
don s

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Chesapeake, VA

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swash level?

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01-01-2014 08:08 AM  4 years agoPost 8
JKos

rrProfessor

Redondo Beach, CA

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You could swap the blades around. Sometimes that makes a difference for the good.

- John

RR rules!

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01-01-2014 08:32 AM  4 years agoPost 9
rcflyerheli

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Granbury, TX USA

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Yup, look at the two links that actually attach to the blade grips themselves. I pulled up a 450 manual and it did show adjustable links going to the grips. Make a mark with a permanent marker or dab of paint on one of the grips and adjust it one or two turns in either direction and see what the tips do. Readjust from there until you get the blades in track.

At the start of the process, I use the procedure to work up from the bottom. Get the swash level at mid stick, and get the lower washout arms level, then get the upper mixing arms level, and from there the main blades. I use a prop balancer (dubro) that has sliding cones to lock the prop, insert one then in the blade grip, slide the other cone up until it locks the rod, and adjust the linkage until the bar from the prop balancer is centered and parallel to the main shaft. That tells you the blades are now perpendicular to the main shaft. Do the same for the other one, and you should have no tracking issues. I've set up about 15 helis this way and had no tracking problems with blade tracking on 500 to 700 sized electric and nitro birds.

Good luck and happy new year.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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01-01-2014 10:07 AM  4 years agoPost 10
Andy from Sandy

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Bedfordshire, UK

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The only time I ever had real trouble with tracking it was down to the blades.

Has the model ever been right or is this a newly built model?

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01-01-2014 01:01 PM  4 years agoPost 11
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Bad dampeners…..

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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01-01-2014 02:13 PM  4 years agoPost 12
unclejane

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santa fe, NM, USA

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You have to adjust the links that go from the swash to the mixers. The mixer-to-grip links are solid plastic for some reason, probably because they're so small it's just stronger to make them solid.

So those links are the only choice for adjusting tracking. Fortunately, they have good resolution so you should be able to line it up nice with those.

LS

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01-01-2014 02:56 PM  4 years agoPost 13
rcflyerheli

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Granbury, TX USA

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I've pulled up 2 separate manuals, and all links appear to be adjustable. Which specific version of the 450 do you have?

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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01-01-2014 02:59 PM  4 years agoPost 14
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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I think you will find that the last iteration of the fly-barred head has fixed links as the OP has stated.

http://www.horizonhobby.com/pdf/450PROKIT.pdf

page 5 links B. Page 7 links A.

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01-01-2014 03:37 PM  4 years agoPost 15
rcflyerheli

rrKey Veteran

Granbury, TX USA

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Ok, my bad. One woulda thought that pulling up two separate manuals, one of them would have shown what this last one did.

I suppose, the only possible adjustments are the swash to the feathering cage washout arms.

I apologize for any mis info.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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01-01-2014 03:50 PM  4 years agoPost 16
AgentOrange

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Jacksonville, Florida

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Hey guys thanks for the information. I will take a look at it today.

Trying not to put them in the dirt.

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01-01-2014 06:37 PM  4 years agoPost 17
AA simon

rrApprentice

barcelos, portugal

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not absoululy sure but

as unclejane says

You have to adjust the links that go from the swash to the mixers. The mixer-to-grip links are solid plastic for some reason, probably because they're so small it's just stronger to make them solid.

apears to be corect

you have to adjust rod C on page 6

Simon Ribeiro

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01-01-2014 07:21 PM  4 years agoPost 18
icanfly

rrElite Veteran

ontario

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anybody consider fb paddles not level and /or fb bent?

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01-01-2014 10:27 PM  4 years agoPost 19
wc_wickedclown (RIP)

rrProfessor

long beach calif

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when you have tried everything else try replacing the head block always works for me.

Insha Allah made in america

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