Rotor Egg Drop B [TRIAL]

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Rotor Egg Drop B [TRIAL]

Postby bernard » April 3rd, 2017, 9:02 am

Rotor Egg Drop is a trial event for Division B at the National Tournament at Wright State University in Dayton, OH.
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Re: Rotor Egg Drop B [TRIAL]

Postby abby1kanobe » April 3rd, 2017, 10:57 am

Were can we find rules for this?

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Re: Rotor Egg Drop B [TRIAL]

Postby bernard » April 3rd, 2017, 11:09 am

abby1kanobe wrote:Were can we find rules for this?

I presume they will be posted either on the national website or tournament website. If you have past rules, it may be fine to use them initially but do check against rules when they are posted. If you do not have past rules, Helicopter Egg Drop trial event rules on the national website appear similar to Rotor Egg Drop rules from past years.
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Re: Rotor Egg Drop B [TRIAL]

Postby Adi1008 » April 14th, 2017, 9:41 pm

abby1kanobe wrote:Were can we find rules for this?

This is quite a while after, but you can find the rules here
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Re: Rotor Egg Drop B [TRIAL]

Postby vb » May 5th, 2017, 2:07 pm

How the cup is tied to the rotor? using thread or tape or something else? What arrangements needs to be there on the rotor to hold the cup?

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Re: Rotor Egg Drop B [TRIAL]

Postby kylg » May 5th, 2017, 7:22 pm

Rules can be found on the wright state scioly site. I have several questions about rotor egg drop. I have been sifting through 2012-2014 rotor egg drop forums and I have concluded that most of the answers to how to make a rotor were to redirect someone to the helicopter duration thread and learn how to make a helicopter duration blade and upscale it to meet size requirements. The Problem is, there is no Helicopter duration forum, only helicopter. The Helicopter forum does not tell you how to make a blade. Another question: wouldn't it be better to utilize all the surface area rather than to have a 2 blade helicopter rotor that barely uses all the area? There would be huge gaps in between the blades. How would the thin blades be better than wide blades?
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Re: Rotor Egg Drop B [TRIAL]

Postby Unome » May 6th, 2017, 5:59 am

kylg wrote:Rules can be found on the wright state scioly site. I have several questions about rotor egg drop. I have been sifting through 2012-2014 rotor egg drop forums and I have concluded that most of the answers to how to make a rotor were to redirect someone to the helicopter duration thread and learn how to make a helicopter duration blade and upscale it to meet size requirements. The Problem is, there is no Helicopter duration forum, only helicopter. The Helicopter forum does not tell you how to make a blade. Another question: wouldn't it be better to utilize all the surface area rather than to have a 2 blade helicopter rotor that barely uses all the area? There would be huge gaps in between the blades. How would the thin blades be better than wide blades?

Managing blade width/number of blades is an important factor in this event. In general, more blades provide more lift but also interact with each other, causing more drag. Since the blades here will be spinning a lot slower than in Helicopters, you would generally want larger/more blades (whereas in Helicopters the speed makes it so that having relatively small blades tends to work better), although the exact amount/sizes is a matter of testing to figure out what works.
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Re: Rotor Egg Drop B [TRIAL]

Postby kylg » May 6th, 2017, 6:17 am

So, Building a helicopter blade that is 15-30 cm wide instead of 5 cm wide could be a place to start testing? Test number of blades and size of gaps until I reach a balance between stability and time? I have seen that gaps between blades aid in stability. My rotor that uses all the surface area might seem stable at 1 floor but if the drop is any higher at nationals, it will start circling and tilting, resulting in me getting tiered.
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Re: Rotor Egg Drop B [TRIAL]

Postby Unome » May 6th, 2017, 6:36 am

kylg wrote:So, Building a helicopter blade that is 15-30 cm wide instead of 5 cm wide could be a place to start testing? Test number of blades and size of gaps until I reach a balance between stability and time? I have seen that gaps between blades aid in stability. My rotor that uses all the surface area might seem stable at 1 floor but if the drop is any higher at nationals, it will start circling and tilting, resulting in me getting tiered.

Sounds like a good plan to me. There's more to the event, but that's about the limit of my knowledge so I can't really say anything more.
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Re: Rotor Egg Drop B [TRIAL]

Postby kylg » May 13th, 2017, 8:54 am

*Questions that have already been answered*
Last edited by kylg on May 14th, 2017, 4:53 pm, edited 1 time in total.
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Re: Rotor Egg Drop B [TRIAL]

Postby kylg » May 14th, 2017, 4:47 pm

Nevermind, I figured that out already. What I really want to know is what the winning times (and from what height) have been for rotor egg drop (or previously known as helicopter egg drop) at national tournaments in the past. I am getting ~2.4 seconds from a 4-meter drop with the egg surviving 100% of the time. Considering how a previous national competition drop was 4 stories and one normal storey (yes that is how you spell that) is 3 meters, A drop from such a competition would be 9 meters My rotor would do 5.4 seconds hypothetically, but since my 2.4 time includes spinning up to optimal speed, which the rotor only has to do once, I should be getting ~6-7 seconds from 9 meters. Is that considered competitive?
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Re: Rotor Egg Drop B [TRIAL]

Postby Unome » May 14th, 2017, 6:13 pm

kylg wrote:Nevermind, I figured that out already. What I really want to know is what the winning times (and from what height) have been for rotor egg drop (or previously known as helicopter egg drop) at national tournaments in the past. I am getting ~2.4 seconds from a 4-meter drop with the egg surviving 100% of the time. Considering how a previous national competition drop was 4 stories and one normal storey (yes that is how you spell that) is 3 meters, A drop from such a competition would be 9 meters My rotor would do 5.4 seconds hypothetically, but since my 2.4 time includes spinning up to optimal speed, which the rotor only has to do once, I should be getting ~6-7 seconds from 9 meters. Is that considered competitive?

From what I can remember, that sounds like a pretty good time. Considering that the top teams will probably have some info stored up from previous years it might not medal, but definitely has a shot if you can get up to 7 seconds.
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Re: Rotor Egg Drop B [TRIAL]

Postby kylg » May 16th, 2017, 12:30 pm

I made one with larger wings and is slightly less stable. If it doesn't get tiered, it will get 7 seconds from 9 meters easy. Good luck anyone going to nationals
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