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Home✈️Aircraft🚁HelicopterBlades and Night Flying › How far can Blade Weight be Off?
05-27-2016 12:39 AM  3 years ago
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jackp332

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Claremont, Nh USA

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How far can Blade Weight be Off?
I have 2 single Rail 606 blades. One is 144g and one is 146g. I have never balanced or used a single blade before to make a pair, I have always bought new. Would these be safe to use?
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05-27-2016 12:56 AM  3 years ago
Ace Dude

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USA

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I would balance them. Even if the weight is the same the chordwise and spanwise CG need to be the same.  
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05-27-2016 01:45 AM  3 years ago
jackp332

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Is 2 grams achievable? I cut a few pieces of packing tape and layed them on the 144g blade on the scale and It didn't go up. I am using a quality digital scale. Assuming the chord wise and span wise balance will come after- is it possible to even add 2 grams to a blade? It's not a huge deal if I can't use them but they are so close and perfect condition I was hoping maybe I could save the money.
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05-27-2016 01:50 AM  3 years ago
Ace Dude

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USA

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Take a look at these to get a better understanding of the process:

https://rc.runryder.com/gallery/349...Rotor_Pro_1.pdf

https://rc.runryder.com/t617645p1/
  
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05-27-2016 01:57 AM  3 years ago
jackp332

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Thank you for the links
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05-27-2016 02:22 AM  3 years ago
Ace Dude

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No problem. The Rotor Pro instructions cover the principle well.  
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05-27-2016 02:22 AM  3 years ago
Dan Minick

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Columbus, WI

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I will weigh my spare 606. Team Synergy, Team FBL Rotors-------if its not broke...it will be!
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05-27-2016 02:26 AM  3 years ago
jackp332

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Thanks Dan let me know
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05-27-2016 01:02 PM  3 years ago
Dan Minick

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Best I can tell, my blade is 144 grams. Of course it could vary from scale to scaleTeam Synergy, Team FBL Rotors-------if its not broke...it will be!
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05-27-2016 03:28 PM  3 years ago
DemetriusUSN

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Virginia Beach, Va USA

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On my helis.....a gram or two is throwing the weight and cg off. I have a Logo 600 se that I thought the main shaft was bent but it turned out to be my blades we're about 2 grams or so different. I put some tape on the lighter one,weighted it again and it was all good. My scale came from Walmart.....a digital food scale,works pretty good. Hope this helps.Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770, HD 750, HD Cell 500
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05-27-2016 04:29 PM  3 years ago
Pistol Pete

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Seffner, FL

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Aluminum tape has the weight to make a difference. (Vs packing tape)~~Enjoying the hobby one flight at a time~~
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05-28-2016 12:46 PM  3 years ago
jackp332

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Thanks guys. Yes that really does help Demetrius- that was what I was wondering. I guess I should try a different type of tape to make up the 2 gram difference. What type of aluminum tape would you recommend Pistol Pete?
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05-28-2016 12:59 PM  3 years ago
wjvail

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Meridian, Mississippi

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How far can the weight be off? Less is better, is the only answer I can give. When I get done balancing blades they are with a 1/10th of a gram.

You need the blades to not only weigh the same. You need the CG to be in the same spot. If you are just hovering, CG isn't as important. But if you do any dynamic flying, you want the CG the same on both blades.

Consider buying or borrowing a Rotor Pro and buy some lead tape. The lead tape is cheap and handy to have around. The Rotor Pro is handy - but not cheap.

https://www.miniatureaircraftusa.co...or-pro-balancer

http://www.ebay.com/sch/i.html?_fro...d+tape&_sacat=0

Bill
"Well, nothing bad can happen now."
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05-28-2016 09:22 PM  3 years ago
Four Stroker

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Atlanta

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Aha. You are trying to use two unbroken singles from different sets of blades. Not a good idea. The fancy balancing method mentioned above is mostly crap. It assumes the blades are perfectly rigid. If you achieve this type of balance with a great wad of tape on one blade, they will still not fly worth a crap DYNAMICALLY.

But hey, try it and report back. It will not destroy your heli if the tape does not come off.
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05-29-2016 05:19 PM  3 years ago
Pistol Pete

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Seffner, FL

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HVAC DUCT tape HERE~~Enjoying the hobby one flight at a time~~
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05-30-2016 12:26 AM  3 years ago
jackp332

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Claremont, Nh USA

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Got it thanks Pete
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