Can't get my blades to track

SurfCity · 04-04-2011, 01:45 AM

Beam V1. Can't get my blades to track. I'm missing something, but I'm clueless. I've changed everything -- main shaft, feathering shaft, dampers, flybar, blade grips. I've redone every link, checked everything for tightness. I've tried five sets of blades. It's like it's a half-turn off, which of course I can't do. One full turn and the blade's too high; a full turn the other way and it's too low. ALL IDEAS WELCOME. Thanks.

akshaw · 04-04-2011, 10:36 AM

Bent headblock? Another thing to look for is slightly bent mixer arms.

dpelletier · 04-04-2011, 04:00 PM

You are adjusting the link from the Main Blade Holder to the Seesaw Mixing arm. "B" in the instruction manual on page 15.

I may be wrong, but...

I think if you adjust "C" link from Swashplate Cap to Seesaw Mixing Arm... each full turn of "C" equals half turn of "B"

Dany

SurfCity · 04-06-2011, 01:50 AM

Thanks. What's happening is that a full turn of C is too much -- one way's low, the other way's high. I need a half turn of C.

dpelletier · 04-06-2011, 10:36 AM

Tracking can't be off by very much...
To get it perfect, You'll probably just have to play with both sides of the head raising one side, lowering the other side, one side adjusting the "B" link, the other the "C" link and so on until you reach the perfection you seek.

akshaw · 04-06-2011, 10:44 AM

The problem is you want to keep mixer arms horizontal at midstick, so there isn't a lot to play with there. I've run into tracking problems from bent mixer arms, and also from a worn out washout base. If these parts are old you might consider replacing them.

dk31 · 04-09-2011, 10:00 AM

A little late but I ll give my 0.02$ anyway.
I ve been there too, a few times, with half turns of C link being too much...
A cheap solution is to buy an extra linkage pack. Then, with four "C" links in hand (two old + two new), find the best pair that will do your job.
Another solution is get the turnbuckles for 450 helis. They cost around 9$ and they allow for micro-tuning
Last, as akshaw mentions, the headblock (main rotor hub) could be bent. Get yourself a new one (you ll need it in the future anyway and these days there are a lot of US vendors that sell it at clearance prices)
Good luck

smmc · 07-27-2011, 05:24 AM

You can do a half turn on the links. Just dont keep putting them on and off constantly. Make sure the link does not crack when you do it. Heck look at the pork chop links, they are designed to go on that way...

tomra · 07-30-2011, 03:31 PM

You can also do a half turn by taking out the ball, inserting it into the link from the "backside" and then put the ball back in the swash/mixer arm. A bit tedious but you won´t risk damaging the link. I would do this but only in the above specific situation were one full turn is either too low or too high. Making up an additional set is also a very good idea. Eventually you will find two that matches.

Also, try swapping the main blades around.

04-04-2011, 01:45 AM	#1
SurfCity Registered Users My HF Map location Join Date: Nov 2007 Location: Roseville, CA	Can't get my blades to track Beam V1. Can't get my blades to track. I'm missing something, but I'm clueless. I've changed everything -- main shaft, feathering shaft, dampers, flybar, blade grips. I've redone every link, checked everything for tightness. I've tried five sets of blades. It's like it's a half-turn off, which of course I can't do. One full turn and the blade's too high; a full turn the other way and it's too low. ALL IDEAS WELCOME. Thanks.

04-04-2011, 10:36 AM	#2
akshaw Registered Users My HF Map location Join Date: May 2006 Location: Plymouth Meeting, PA	Bent headblock? Another thing to look for is slightly bent mixer arms. __________________ BEAM: jazz 40, scorpion-8, 3xHS65mg, gy401+9257 FBL Compass Atom: Stock motor, YGE80, 3x9650, 9254

04-06-2011, 10:44 AM	#6
akshaw Registered Users My HF Map location Join Date: May 2006 Location: Plymouth Meeting, PA	The problem is you want to keep mixer arms horizontal at midstick, so there isn't a lot to play with there. I've run into tracking problems from bent mixer arms, and also from a worn out washout base. If these parts are old you might consider replacing them. __________________ BEAM: jazz 40, scorpion-8, 3xHS65mg, gy401+9257 FBL Compass Atom: Stock motor, YGE80, 3x9650, 9254

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04-04-2011, 04:00 PM	#3
dpelletier Registered Users My HF Map location Join Date: Apr 2010 Location: South of the Border, Maynard, Massachusetts	You are adjusting the link from the Main Blade Holder to the Seesaw Mixing arm. "B" in the instruction manual on page 15. I may be wrong, but... I think if you adjust "C" link from Swashplate Cap to Seesaw Mixing Arm... each full turn of "C" equals half turn of "B" Dany

04-06-2011, 01:50 AM	#4
SurfCity Registered Users Thread Starter My HF Map location Join Date: Nov 2007 Location: Roseville, CA	Thanks. What's happening is that a full turn of C is too much -- one way's low, the other way's high. I need a half turn of C.

04-06-2011, 10:36 AM	#5
dpelletier Registered Users My HF Map location Join Date: Apr 2010 Location: South of the Border, Maynard, Massachusetts	Tracking can't be off by very much... To get it perfect, You'll probably just have to play with both sides of the head raising one side, lowering the other side, one side adjusting the "B" link, the other the "C" link and so on until you reach the perfection you seek.

04-09-2011, 10:00 AM	#7
dk31 Registered Users My HF Map location Join Date: Nov 2009 Location: Greece, Athens	A little late but I ll give my 0.02$ anyway. I ve been there too, a few times, with half turns of C link being too much... A cheap solution is to buy an extra linkage pack. Then, with four "C" links in hand (two old + two new), find the best pair that will do your job. Another solution is get the turnbuckles for 450 helis. They cost around 9$ and they allow for micro-tuning Last, as akshaw mentions, the headblock (main rotor hub) could be bent. Get yourself a new one (you ll need it in the future anyway and these days there are a lot of US vendors that sell it at clearance prices) Good luck

07-27-2011, 05:24 AM	#8
smmc Registered Users Join Date: Aug 2008 Location: Conneaut Ohio	You can do a half turn on the links. Just dont keep putting them on and off constantly. Make sure the link does not crack when you do it. Heck look at the pork chop links, they are designed to go on that way...

07-30-2011, 03:31 PM	#9
tomra Registered Users Join Date: Jan 2008 Location: Norway	You can also do a half turn by taking out the ball, inserting it into the link from the "backside" and then put the ball back in the swash/mixer arm. A bit tedious but you won´t risk damaging the link. I would do this but only in the above specific situation were one full turn is either too low or too high. Making up an additional set is also a very good idea. Eventually you will find two that matches. Also, try swapping the main blades around.