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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › I learned a good lesson on blade tracking today (w/ pic!)
09-16-2009 06:50 PM  11 years ago
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Jim Deadly

rrNovice - Jacksonville, FL USA MyPosts All  Forum  Topic

I learned a good lesson on blade tracking today (w/ pic!)
So I was out at the field the other day and for some reason my thumbs decide to apply the ground brakes in a lateral fashion.

Broke a control arm and trashed a set of blades, no biggie.

Tossed spare parts in, zeroed everything out, good to go.

Went to the field this morning, checked blade tracking with bird on the ground, looks dead on.

Pop up into a hover and I am like WTF tracking is off by 3/4 of an inch.

Set it down and proceed to fiddling. Hmm can't get it to track right again for the life of me when it's on the ground.

Reverse all changes, tracking looks good spooling up on the ground.

Back in the air we go. Blade tracking is off by 3/4 of an inch.

So I say ok, I must have bent a feathering shaft. Disassembly ensues and that shaft is straight as an arrow.

Ok must be in the links. Checked lengths and straightness, checked balls for looseness or alignment issue, everything is great.

Now I am baffled. Check paddles and flybar, break out the pitch gauge, double check everything again, looks great.

Around this time I am starting to think I need new glasses.

Ground check, spool up, dead on, what a great tracker I am.

Up into hover we go and the blades are 3/4 of an inch off again.

Now my mind is on fire.

Finally I say let me try the spare CF blades I have been saving since forever.

BAM! Perfection at last!

Never before has it even crossed my mind to check the straightness of a blade, especially a brand new one with such perfect balance.

Here's the world worse picture of the blade. They are really hard to take a picture of the long way!

Lesson learned, lots of practice with head adjustment was the plus.

Just wanted to share one of the things I never read anywhere yet: Sight check your blades for straightness!!!
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09-16-2009 07:00 PM  11 years ago
Darren Lee

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Woodstock, GA

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Some blades just won't track, even if they look straight.
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09-16-2009 07:16 PM  11 years ago
FloridaHeli

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jacksonville, florida

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Jim Deadly,

I doubt I would have thought of that. It just never occurred to me that a CF blade would not be straight. I balance all my blades; new or used and many are not of equal weight or CG centered. From now on I'm going to include a look down the Leading Edge and Trailling Edge to make sure they are straight.

Thanks for sharing.
This hobby is WAY too expensive!!
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09-16-2009 08:46 PM  11 years ago
chopper_crazy

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Delphos, Ohio

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It is good to just get into the routine of balancing all blades when you get them. That way you never have to worry about them.It's a complex, costly, glow powered anti-gravity machine!
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09-16-2009 08:56 PM  11 years ago
ruddernate

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sulphur,Ok.

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Never before has it even crossed my mind to check the straightness of a blade, especially a brand new one with such perfect balance
he said they balanced but were far from straight.
fly it like you stole it
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09-16-2009 09:05 PM  11 years ago
FlaG8r

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Florida

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IMO, I never balance anything larger size blades. (larger than 325's) IMO, I've only ever had issues with the smaller wooden and CF blades. Anything larger has never been an issue for me.Life is tough, it's tougher if you're stupid
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09-16-2009 09:12 PM  11 years ago
outhouse

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auburn ca

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if you dont balance youll pay the price yet!

you just havnt been charged yet
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09-16-2009 09:27 PM  11 years ago
airboss

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OC ,california

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use better rotors ! never in all the years of flying have my CY710s ever been defective. many brands to pick from and most of us will buy inexpensive rotors to save a buck, but they wont be perfect and when they are be thankfull, you get what you pay for and sometimes not Urukay HPS3 KSE 700 HPS3
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09-17-2009 05:26 AM  11 years ago
Jim Deadly

rrNovice

Jacksonville, FL USA

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Someday i will only buy high quality blades but being pretty new, that isn't economically sound.

At this point, I am in fact wanting to try new and different blades.

Each one has had a different feel, a different "taste" if you will, and each different set has taught me a new feel in flight.

Another big thing is that I really like to fly low. We are talking dying the blades green from grass low sometimes. It's just what I like to do.

Makes crashes far less spectacular, but what the hey.

I even fly my foamies at eye level. Nothing wrong with my neck, it's just what I do.

But yes, I am sure someday I will find that special blade and stick to it, but for now I will be trying many many new and different blades.
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09-17-2009 10:16 PM  11 years ago
flyingquisinart

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Detroit Area

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Had that happen with a brand new heli with brand new TT blades. I bitched and moaned for a week then finally looked carefully at the blades (duhh) and they were warped.must have been a downdraft
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09-17-2009 11:13 PM  11 years ago
jgunpilot

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Pollock, LA

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They try hard to get them straight, but most blades are made by hasheesh addicts in hellish sweatshops. If they make their daily quota of blades, they give them a louse ridden pallet of straw, a cold bowl of rice, and some hasheesh.

It only stands to reason, is all I'm saying.
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09-17-2009 11:37 PM  11 years ago
ZXXflyer

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stone mountain, georgia, US

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what's the hasheesh for when they are probably wasted from epoxy fumesBeliever in Weston motors!
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09-18-2009 12:48 AM  11 years ago
airboss

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OC ,california

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they dont use hashish in china just meth and rice, thats why all the stuff is tweeked out and inconsistent.Urukay HPS3 KSE 700 HPS3
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09-18-2009 02:54 AM  11 years ago
flyingquisinart

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Detroit Area

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Jim,

For bargain blades I've used SWE a few times and they balance nice and seem good for the price. I don't know how well they 3d--I just do fast fwd with loops & rolls and stuff.
must have been a downdraft
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