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HomeAircraftHelicopterHelicopter Main Discussion › Trimming Main Rotor Blades
10-12-2005 01:54 AM  13 years agoPost 1
gmcullan

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Southbridge, MA

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I also posted the following in the Blade CP forum. I'm also posting here in the hopes of reaching a wider range of opinions and expertise:

OK, I did it again this evening. Hovering in the kitchen, I drifted a little too far and nicked a rotor blade on a chair. Not a bad nick, but enough to adversely affect flying qualities.

I've done this to three sets of rotor blades with the damage ranging from 1/8" to 1/4".

So my question is, can I trim the blades (lengthwise) back these amounts, rebalance as required, and end up with a viable set of rotor blades. My thinking would be to harden the ends of the trimed blades with a light brushing of medium viscosity cyanoacrylate.

Anyone successfully do this?

Best regards,

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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10-12-2005 02:24 AM  13 years agoPost 2
Wa11banger

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Huntsville, Al

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One of the guys just posted about doing this... He was buying longer blades because they were cheaper, then cutting them down, balancing and sealing with CA.. says it works like a charm and I would guess as long as you have the skills to keep it the same length and rebalance, it would not be a problem. Be patient and go carefully.. The lift on the blade is already just a tad low so a 1/4" is a lot. I would venture to say you should not go any more than that at max... BTW if you dont fly around chairs you may not have that problem

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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10-12-2005 02:37 AM  13 years agoPost 3
gmcullan

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Southbridge, MA

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I hear you about the chairs, but with the heavy rain in Massachusetts today, indoor flying was my only option. I've had my Blade outside and it is a great little flyer.

OK, I have the capability to cut the blade very accurately (to within a thousands of an inch) as well as balance them (to within about .01 gram).

Looking at the size of the Blade's blades, I thought that 1/8" might be reasonable and that 1/4" might be pushing it.

The slightly shorter blades should result in a higher headspeed. Will the higher headspeed increase stability or will the loss of mass at the tips negate any advantage? Regardless, the little Blade CP continues to be a fun learning experience.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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10-12-2005 02:54 AM  13 years agoPost 4
MicroDOC

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Goleta, CA

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That should not cause you a real big problem. With the blades, that is! You must not be married. My wife would make the blade problem seem minor if I were to fly into HER furniture!

Experience is something you don't get until just after you need it!

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10-12-2005 03:08 AM  13 years agoPost 5
gmcullan

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Southbridge, MA

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I guess I'm lucky, for my wife bought me my Blade and enjoys watching its flights. I've tried to get her to try it too, but she's declined to try. She does race slot cars with me. As a matter of fact, she owns more slot cars than I do, both in HO and 1/32nd scales.

She bought me the Blade CP when health problems caused the loss of my full scale pilot's medical certificate. She'd been my copilot for many happy hours.

Knowing how much I missed flying and my facination with the mechanics and flight dynamics of helicopters, she bought me the Blade CP. And in our own ways, we are both enjoying it.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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