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04-06-2013 06:09 PM  6 years ago
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1drummer

rrApprentice

Brookhaven, MS USA

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Tracking issue on Benzine
I have developed a vibration with my mechanics on my Benzine trainer and can't for the life of me figure out the problem. I know I am over thinking something, but I need some assistance in figuring it out.
One thing I eventually noticed is I improved it to a tolerable level by re-tracking the blades at hover, which prior was tracked, but ended up one round out. I have noticed at spool up and low to quarter stick, the blades are out of track until I get to lift and hover stick.
I have checked the mainshaft run out, proper ball link position, flybar balance as well as blade balance and cannot find the problem. I have tried another set of blades that I fly on another benzine, same thing.
Keep in mind this developed.... I have not crashed it or done anything different to it, I just need advice on why it is out of track when I am not at midstick and tracking at hover?

Thanks in advance for any advise, I am stumped.

Richard
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04-06-2013 06:28 PM  6 years ago
Wayne Parrish

rrVeteran

Apex,NC,USA

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Richard,you may have ablade that is out.Check the balance on both blades and compare .What brand blades are they ?
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04-06-2013 07:07 PM  6 years ago
Notar

rrKey Veteran

Taxachussetts

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Do you have the timing set properly on the washout?
When you built the head, did you install all the shims?
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04-06-2013 07:15 PM  6 years ago
1drummer

rrApprentice

Brookhaven, MS USA

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Thanks for the replies.
Wayne, the blades are the Vario 800 mm blades, I don't think they are the problem due to the fact I have tried other blades I fly and the same issue is present.

Joe, I will tear the head down and check to see everything is there and correct. Just so I am understanding completely, when you say washout timing, can you explain so I make sure I am looking at the right thing?

Thank you for your help.

Richard
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04-06-2013 09:44 PM  6 years ago
JKos

rrProfessor

Redondo Beach, CA

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Flybar paddle alignment?

- John
RR rules!
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04-06-2013 10:36 PM  6 years ago
1drummer

rrApprentice

Brookhaven, MS USA

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Thank you I checked that and it's ok.
I have my head tore down and I haven't found any discrepancies yet. a couple of questions....
The thrust bearing that has the two race/washers on it, which race has the smaller ID hole that slips onto the feathering shaft? The inside race toward the main shaft or the outer? I have a race with a 0315 mm opening and one with 0325 mm opening. And exactly where does the notched race go? Does it face the open bearing?

Thanks
Richard
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04-06-2013 11:56 PM  6 years ago
1drummer

rrApprentice

Brookhaven, MS USA

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Disregard my last post, I found my plans.
Thanks
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05-22-2013 12:11 PM  6 years ago
garyl

rrVeteran

taxachussetts

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Get the hard durometer orings for the head, this fixed an issue I had with tracking issues. The Vario online store is not working at the moment so I can't post a link to the part.
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05-23-2013 10:34 PM  6 years ago
1drummer

rrApprentice

Brookhaven, MS USA

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Thanks Gary I will.

Richard
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06-12-2013 04:33 PM  6 years ago
geomecc

rrKey Veteran

Long Island ,NY

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+1 on feathering shaft dampenersR I P Roman Jr. Team SKOOKUM SRW EFC
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