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Home✈️Aircraft🚁Helicoptere-BladeOther › Carbon Blade Comparison
07-21-2006 03:02 AM  14 years ago
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gmcullan

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Southbridge, MA

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Carbon Blade Comparison
I've been flying both my Blade CP and HoneyBee CP2 helis with E-flite symetrical carbon fiber main rotor blades. The average weight of the blades have been approximately 13 grams. Blade balance has been very good. The blade tips are gently rounded. Flight performance has been predictable and consistent.

While shopping for some HoneyBee spares at the Balsa Products web site, I noticed that they had E-Sky symetrical carbon fiber main rotor blades on sale for $7.00 less than the typical selling price of the E-Flite blades. Naturally, I had to order a set to try them out.

Shipping was prompt and fast and I soon had the blades on hand for testing. Initial inspection indicated that the finish and construction of the blades were comparable to the E-Flite blades. Two significant differences were noted. First was the shape of the blade tips. There was an angular, almost chiselled apprearance to them. Secondly, and maybe more significantly, the blades weigh in at 9.5 grams.

The E-Sky blades were prepared for flight as I do all my carbon fiber blades. The outer top inch of both blades were airbrushed contrasting colors. I use orange and yellow. These color bands allow me to check blade tracking as well as providing positive indication of the outer edge of the main rotor arc.

The blades exhibited excellent balance as tested on my K&S main rotor blade balancer.

Once installed on the HoneyBee CP2, pitch and tracking was tested. There were no differences in measurements as compared with the removed E-Flite blades. Spool-up was quicker, as would be expected with the lighter blades. Lifting off as I normally do, initially I significantly overcontrolled. Setting back down and collecting my nerves, I took off once again. I soon realized that I was experiencing quicker control response from the lighter blades. I also suspect that the blade tips may have had some impact on the control response.

I spend about 1/3 of the charge capacity hovering with the remainder of the charge expended in gentle forward flight maneuvering. I do admitt to doing a couple of stationary forward flips.

The initial impression at this time is that I like the E-Sky blades. Testing will continue by installing them on my Blade CP.
Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450
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07-21-2006 02:57 PM  14 years ago
Renfield

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Anderson, SC - USA

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I was about to point you here: http://www.helidirect.com/product_i...products_id=889

Where those blades were recently selling for $19.95, then I noticed they've gone up to $29.95

Well, they were "decent" at the old price, but I'll take the Eflights for a buck less ($28.99 @ HobbyTownUSA).

Nothing like a 33% price hike to kill a deal.

Cheers,
George
If a duck flies inverted, does it quack up?
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07-21-2006 03:03 PM  14 years ago
rky5

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Oak Hills california

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Umm
I think those are the blades I paid $19 for a few months back, they were ok I went back to the wood because they are liter....but they were very nice and they sent them right off to me.

I wish the fiber blades were a little liter yet. I dont like the covering on the wood ones they get scuffed up easy in transport.
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07-22-2006 02:22 AM  14 years ago
gmcullan

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Southbridge, MA

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Additional Observations
Continuing to fly with the test blades in question, I noticed that the proportional mix to the tail rotor was "off". The E-Sky blades required more tail rotor power to as to maintain tail control. Measurements of the two blades showed that the E-Sky blades were approximately 0.025" thicker than the E-Flite blades. The E-Sky blades also exhibited a rounder, more blunt leading edge to the blade. These characteristics result in the E-Sky blades producing a higher level of induced drag. This higher level of drag results in a higher torque reaction and thus requires more tail rotor power/control to counter.

The above also serves to illustrate that with almost any change made to our helis, an additional change or adjustment will be required to balance everything out once again.
Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450
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