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HelicopterMain Discussion › Tail blades nicked - safe to use?
12-21-2013 09:56 PM  3 years agoPost 1
Sam2b

rrElite Veteran

Seattle, WA

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115mm Edge tail blades. I used epoxy glue to help, for what it's worth. What do you think while spinning at 9410 rpm with 1900 head speed on 690mm blades? I don't see an rpm spec. I'm using 800-class duty tail hub & solid 6mm shaft.

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_Sam B_
Team MSH USA * Protos Max * Xpert servos * Cyclone Blades * ProgressiveRC * VoltMagic * Ecalc

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12-21-2013 10:07 PM  3 years agoPost 2
unclejane

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santa fe, NM, USA

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I've done worse, but I also ordered a new set next day air before heading to the field.... I came back with the whole heli, but you never know

LS

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12-21-2013 11:03 PM  3 years agoPost 3
Flyin for Jesus

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Dana Point, Ca.​92629

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Those are still out of balance.
Balanced blades, or a prop will stop in any direction. The problem with your setup is that the blades must be straight out. Spool them up in the heli, then remove them without moving them ( tough job )... then balance them.

Note: I cannot really speak for a heli tail as I have only balanced airplane props on that kind of balancer... but a ( perfectly ) balanced airplane prop would stop in any spot... one that is really close... moves to the heavy spot but very slowly since the weight offset is very slight.

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12-21-2013 11:17 PM  3 years agoPost 4
Dr.Ben

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Richmond, VA, USA

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+1
Balance the hub assembly alone in vertical and horizontal orientations and match the tail blades on a Koll Rotor Pro. Balancing a complete head assembly will drive you crazy if you really want it dead nuts.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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12-22-2013 12:58 AM  3 years agoPost 5
Einzelganger

rrKey Veteran

Campbell, Texas

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I don't know too much about the balance issue. Seems to me if they spin up and the bird exhibits no tail issues, they will fly well.
As to safety, I doubt that they will break in flight. The trailing edge at the root is not the main stress point.
Would I fly them? Yes. Would I replace them at the first chance? Yes.
I had a flame-out on my Freya that did the exact same damage. The blades worked with no issues, but I replaced them when I got back to the shop. I don't want any issue nagging at the back of my mind on my helicopters. They are for relaxed enjoyment, and a rush. The rush is from pushing my skills......not from worry about in-flight failure. Also, a blemish on my favorite toy takes away from the fun.

Wayne

I love the smell of nitro in the morning.
RIP Roman

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12-22-2013 01:11 AM  3 years agoPost 6
BobOD

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New York- USA

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You'd have to take off the pitch slider housing as that's not balanced.

Team POP Secret

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12-22-2013 01:29 AM  3 years agoPost 7
Josh Kussman

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Superior, NE

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If Your wanting to use them, make sure they don't flex side to side. I've always just thrown them away if one flexes a little because it could flex under a hard stop and break

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12-22-2013 03:08 AM  3 years agoPost 8
Sam2b

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Seattle, WA

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Yikes, that WAS a stupid move on my part about using the pitch slider attached. I will proceed to do the other things mentioned (hub alone, then with grips, then all with blades at 180 degrees apart). I've already balanced the blades, nuts, washers, bolts, and blades individually on a digital jeweler's scale to 0.01g.

Thanks for catching that! I'm learning from my mistakes, so that's a bit of progress. Since it's rainy weather for the next ~3 months in Seattle, I'm up for the challenge. I would imagine this is what the speed run guys do along with perfectly machined shafts, head, hub, etc. Anal & OCD (AOCD?) comes with the territory, it seems.

Thanks so much, guys.

_Sam B_
Team MSH USA * Protos Max * Xpert servos * Cyclone Blades * ProgressiveRC * VoltMagic * Ecalc

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12-22-2013 06:55 AM  3 years agoPost 9
BobOD

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New York- USA

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Since it's rainy weather for the next ~3 months in Seattle, I'm up for the challenge.
That's a good spirit. I kind of enjoy the off season. It's a good time to get things in order.

Team POP Secret

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12-22-2013 07:43 AM  3 years agoPost 10
Funky Trex

rrElite Veteran

Westerville, OH -​USA

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I might be a bit too cautious, but I stop running my mains or tail blades if I knick the roots. I know most of them would probably be fine, but I change them anyways.

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HelicopterMain Discussion › Tail blades nicked - safe to use?
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