Helicopters B

helicpters_rule
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Re: Helicopters B

Postby helicpters_rule » November 25th, 2013, 3:47 pm

hey idk if this has been posted my me aready im sorry if it has my coputer is being difficult. im wondering if what sort of times people are getting i am getting around 2 mins 40 seconds.

helicpters_rule
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Re: Helicopters B

Postby helicpters_rule » November 27th, 2013, 11:34 am

Are we allowed to help give the Helicopter a boost?
I guess you could but be careful because someone broke the helicopter by doing that. And from what i know it has no benefits.

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Re: Helicopters B

Postby helicpters_rule » November 27th, 2013, 11:37 am

I generally prefer .020. Thicker wire is pretty hard to bend since it is so strong, resulting in imprecise shapes and potentially unbalanced shafts.
Commonly available sizes at your local hobby shop.
0.015 inch diameter will bend with most helicopter motors.
0.020 inch diameter works, probably about as small as you can go. MIGHT be a little small for really fat motors/inexperienced teams.
0.025 inch diameter will solve any problems with 0.020 but IS heavier.
0.032 inch diameter is overkill.

my experience.

Jeff Anderson
Livonia, MI
Agreed.. .020 bends easy with pliers, cuts easy with side cutters and keeps it's shape very well even with a ton of knots on a motor. You'll break the motor stick before deforming the shaft hook.
I've only used 0.020 and have never had problems it is what comes in the kits form freedom flight models.

Hosj
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Re: Helicopters B

Postby Hosj » December 5th, 2013, 2:16 pm

I was never able to get the freedom flight model to work well. Our best time was 1:26.
Nationals 2013: Meteorology 2nd, Water Quality 7th, Dynamic Planet 28th, Helicopters 41st
Nationals 2014:Hydrogeology 8th, Game On 25th

indoorguy
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Re: Helicopters B

Postby indoorguy » December 7th, 2013, 9:07 am

I have a question about the single-blade rule for 2014. The only thing defining rotors is in 3e. Rotors are defined as one or more blades that rotate on a common path around a vertical axis. What is meant by common path? Is it a circle in a single plane? Is it a cylinder? Is it a cylindrical volume? If one of the latter two, what defines the height? Has there been any discussion of this, or a rule clarification?

Ray Harlan

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Re: Helicopters B

Postby jander14indoor » December 8th, 2013, 4:23 am

As usual, opinion, not official...

I interpret that as follows. Pick any arbitrary blade and call that blade one. It rotates around a fixed axis at a fixed pitch. Pick any (and frankly all) arbitrary blade position around that axis. Every other blade on the rotor must pass through that same position while using the same axis.

Another way to think about it. Again, pick a single, arbitrary blade on a rotor. As it revolves around its axis it will sweep out a disk shaped volume with some, possibly non-uniform thickness depending on its shape. Every other blade on the rotor must sweep out the same volume.

I see nothing in the rules that addresses the thickness of the volume. By its nature as a rotating object the volume will be round when viewed from above.

You might ask what a blade is. I'd expect typical practice, a single, continuous, aerodynamic surface that extends from the central axis to the maximum radius.

IF anyone is asking for specific, perhaps unusual interpretations, I suspect the clarification would be that the ES has to see it in person.

Regards,

Jeff Anderson
Livonia, MI

hogger
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Re: Helicopters B

Postby hogger » December 10th, 2013, 8:36 am

Another way to think about it. Again, pick a single, arbitrary blade on a rotor. As it revolves around its axis it will sweep out a disk shaped volume with some, possibly non-uniform thickness depending on its shape. Every other blade on the rotor must sweep out the same volume.
So if we have two different blades that cover two different set of vertical volume but the two blades are attached to the same axis, is that ok? The two blades are not on the same horizontal plane, but they are attached to the same rigid rod and move in synchronous and not independently. Does that count as 2 different rotors with one single blade each? Not sure if I explain this correctly.

jander14indoor
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Re: Helicopters B

Postby jander14indoor » December 10th, 2013, 7:10 pm

Hmmm, interesting question. I'm going to leave that one to the official clarifications... And to any ES who actually SEEs your helicopter.

Reminder, I can ONLY offer opinion on this site...

Jeff Anderson
Livonia, MI

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Re: Helicopters B

Postby hogger » December 12th, 2013, 9:28 am

I believe the esteemed Mr Ray Harlan is my event supervisor, so I wouldn't mind if you can weigh in your take at the question of having 2 single blades with some vertical distance apart but attached to the same fixed axis.

AlexL123
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much halp pls

Postby AlexL123 » December 12th, 2013, 12:09 pm

much help requir 3 roter wow so confus pls much donet how to build wow so help plsImage


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