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Home › ✈️Aircraft › 🚁Helicopter › Align › T-REX 600N › What is the most percise way to Balance a Pair of Main Blade??
06-20-2009 12:35 AM  11 years ago
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jascamera

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san francisco, ca

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What is the most percise way to Balance a Pair of Main Blade??
I am using a little $15 balancer that they sell on Ebay
http://cgi.ebay.com/Main-Blades-rot...rkparms=65%3A12|66%3A2|39%3A1|72%3A1205|240%3A1318|301%3A1|293%3A1|294%3A50

Seem to work good, but still have a a bit of vibration.

What is the most scientific way to balance a pair of blade?? And tools that needed??

I have the Curtis Young Blood 600 blade.

Jason
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06-20-2009 01:08 AM  11 years ago
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gftazz

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upstate N.Y. in the Adirondacks

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I think the best balancer that was available was the Koll Rotor Pro which you used to balance them span wise and chord wise to each other which is just about as perfect as one can get them. The K.R.P. isn't made anymore so you would have to make one yourself or find one used.

I find the Radix and most blades nowadays are pretty close and only once in a while are they way off so maybe the vibration may be coming from another source. Try balancing head as a whole, check paddles are out the same distance on flybar, check motor fan and clutch runout too. Tail shaft, spindle, dampners are greased lightly etc some other possiabilities.Oh No Someone Please Stop Me Before I Go Broke With This Heli Thing!!
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06-20-2009 03:41 AM  11 years ago
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FloridaHeli

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jacksonville, florida

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blade balancing
I read on RR a way to balance that has worked well for me.

First weigh the blades on a postal gram scale. Harbor Freight has them on the cheap. If they are within a few grams of each other you should be able to balance them perfectly.

Then you find the Center of Gravity of each blade. Do this by balancing the blade on a main shaft, or other cylindrical part laying around, that is perpendicular to the length of the blade. Mark this CG.

Now bolt the blades together or if you have a blade balancer put them on the balancer and see which one is lighter. Place some tape or monocoat or mylar whatever you can get at the LHS and place it centered on the CG. This is a guessing game on how wide and long the tape should be. Just keep trying. When the blades lay level and are balanced you have done it. Make sure the tape overlaps Leading Edge to Trailing Edge of the blade. If the other way around the air can peal it off in flight.

I do this to all my blades before flying them. I like using vivid orange that I get at the LHS in 5" wide sheets. The orange stripe really stand out on white or black blades.

Now go have fun flying.This hobby is WAY too expensive!!
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06-20-2009 03:49 AM  11 years ago
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devious17

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Malaysia

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I simply hang my heli on the wall and level it, remove the main gear before that. With this the heli is leveled and holding the whole rotor head I simply balance the whole unit.
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06-20-2009 05:16 AM  11 years ago
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what_the_helli

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cookeville, tn USA

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the koll is still available

http://www.ronlund.com/Merchant2/me...uct_Code=MA0514

I do not doubt it may be the most accurate, but with the quality of todays blades I don't feel a $100+ balancer is worth the cash, or a necessity. Many of us just use the $20 to $40 versions with great successI put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com
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06-20-2009 09:40 PM  11 years ago
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jascamera

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san francisco, ca

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Thanks guys. I just bought a scale, so should help get the best balance blades.

Thanks everyone.

Jason
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06-21-2009 01:25 AM  11 years ago
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Avropilot

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Murfreesboro, Tennessee

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I simply hang my heli on the wall and level it, remove the main gear before that. With this the heli is leveled and holding the whole rotor head I simply balance the whole unit.
Huh?Waiting for parts
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06-21-2009 08:22 PM  11 years ago
0Post 8
xxcysxx

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Baltimore, MD - USA

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Koll Rotor Pro of Miniature Aircraft!!!

probably the finest blade balancer ever invented. If i'm not mistaken on this victor cambel uses the koll rotor pro to balance his v blades. That is why every set of v blades are shipped perfectly balanced.

i used to pay $79.99 for this balancer from my local hobby shop about 15 years ago. it also appear to me after laurel koll pass away this balancer's appreciated in price considerably. or is it our dollars value just depreciated ever since.

this balancer is not so desirable anymore because many blade manufactures prebalance their blades at the factory. But for multirotor blades this balancer is unmatched.

i still use this balancer to check all my blades everytime i buy new blades even till this day.Tam
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06-21-2009 09:35 PM  11 years ago
0Post 9
GyroFreak

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Orlando Florida ...28N 81W

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How does the Koll Rotor Pro work. The picture doesn't give me any clues. Anybody have instructions ?
EDIT: Just found the instructions on line.

PaulI think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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06-22-2009 12:44 PM  11 years ago
0Post 10
rcnut

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Rockford, Illinois

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I have and use the Koll Rotor Pro. Back in the day when wood blades came in the heli kits, you truly needed a balancer. I still use mine to trouble shoot head vibrations, or to put reflective stickers on the tips, etc.Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!
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07-01-2009 03:07 PM  11 years ago
0Post 11
hundemann

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Hamburg, Germany

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Taxis
I'm using this balancer (well, here in Germany it is called "Taxis Rotorblattwage" and is supposed to be invented by Werner Taxis back in 1985: http://heliguenter.de/shop/shop/ind...uemart&Itemid=1).

I have to admit, that I never had such perfect results, as with this balancer. It can be used for all kinds of blades (tail, main, paddles) as well as common screw diameters.

It is expensive though, so if you are not balancing hundreds of blades each days, this one might be really a bit too much.
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07-01-2009 09:37 PM  11 years ago
0Post 12
xxcysxx

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Baltimore, MD - USA

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that is the exact same concept as the koll rotor pro. i'd have to say it probably is the same thing. just made by different people.
hey, what gives. i though laurel koll invented this, or did he copy it. but i doubt that he did.

anyway, without a doubt it is a great balancer. i do use it to balance main rotor blades, tail rotor blades, and paddles as well. always perfect result everytime.
it is a nice concept for balancing and can easily be made by yourself.Tam
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