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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsOther › What is different about FBL blades?
03-08-2012 05:56 AM  6 years agoPost 1
BrianApp

rrVeteran

Grand Rapids, MI

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I have read that special FBL blades are a good idea for most fbl systems. I read that FBL blades are, heaver, cg closer to the tip, and cg closer to the leading edge. I also read that FBL blade pairs when suspended by a rod though their bolt hole should hang straight down and not come together at the tip like standard blades would. This is due to the cg being farther toward the leading edge.

That is all fine. With all these differences it seems FBL blades serve a purpose. Well guess what. None of this applies to the Align 325mm 3g blades which I thought were Align's FBL version. Their weight is within .5gram of the standard align carbon blades. The CG is within 1/8" from root to tip of the standard blades. They also cross when suspended by a rod in the bolt whole exactly like the standard blade.

So what gives? Does align just stamp "3g" on their standard blades? Is this all just marketing hype? Does align just make poor FBL blades?

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03-08-2012 02:56 PM  6 years agoPost 2
unclejane

rrElite Veteran

santa fe, NM, USA

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Probably, probably, and I don't think so, necessarily.

I tend to think the differences are subtle enough that you're not going to notice them most of the time. A very slight lead in the blade indexing is supposedly OK for FBL.

My larger Align blades - 690D's and 700 F3C's - hang with virtually no lead at all, if any. And they fly just fine on my FBL trex's. I havn't checked the blades on my 450, tho.

LS

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