Wind Power B/C

wzhang5460
Member
Member
Posts: 87
Joined: April 29th, 2017, 3:53 pm
Division: B
State: NY

Re: Wind Power B/C

Postby wzhang5460 » May 13th, 2017, 6:49 pm


Do you happen to know what the resistance was?
It's changed since last year (since now the resistance can be much more), but I suppose it was at 7.5ish ohms because our blade performed better at Nats than at my home setup.
Oh I see. Our turbine got about 300 mV at States but i don't know what the resistance was.
I'm guessing 10 ohms?
PJ Gelinas Jr High Captain
National Medals
Wind Power 2017: 5th
National Honorable Mentions
Mystery Arch. 2018: 7th
Exp. Design 2017, 2018: 10th
Towers 2018: 10th

Circuit Lab NY State Champion

User avatar
Alex-RCHS
Member
Member
Posts: 532
Joined: November 4th, 2016, 3:46 pm
Division: C
State: NC
Location: Raleigh, NC

Re: Wind Power B/C

Postby Alex-RCHS » May 13th, 2017, 9:02 pm

Knowing the resistance is nice but there are other factors at play as well. The motor itself has an internal resistance, and not every fan is the same.
About me!
Raleigh Charter HS (NC) 2018
UNC-Chapel Hill 2022

User avatar
daydreamer0023
Member
Member
Posts: 195
Joined: January 29th, 2015, 5:44 pm
Division: Grad
Location: I have no idea where I am, but I can tell you exactly how fast I'm going ;)

Re: Wind Power B/C

Postby daydreamer0023 » May 14th, 2017, 8:08 am

Knowing the resistance is nice but there are other factors at play as well. The motor itself has an internal resistance, and not every fan is the same.
Based off of that, if you want a slightly more accurate comparison, you might want to grab a tachometer and try finding the rpm of your blade - that could give you a sort of guesstimate of performance.
"I am among those who think that science has great beauty. A scientist in his laboratory is not only a technician: he is also a child placed before natural phenomena which impress him like a fairy tale." - Marie Curie

Ionizer
Member
Member
Posts: 32
Joined: March 20th, 2014, 6:03 pm
Division: Grad
State: PA
Location: Pitt

Re: Wind Power B/C

Postby Ionizer » May 14th, 2017, 9:40 am

Knowing the resistance is nice but there are other factors at play as well. The motor itself has an internal resistance, and not every fan is the same.
Based off of that, if you want a slightly more accurate comparison, you might want to grab a tachometer and try finding the rpm of your blade - that could give you a sort of guesstimate of performance.
I don't think this will help either. Different fans will still have different strengths. Different motors will have different frictions. Also rpm should depend on resistance as well. Electrical resistance adds a physical component that makes the motor harder to turn.
Class of 2016 Bayard Rustin High School Alumnus
State Event Supervisor
My Page

chozillla
Member
Member
Posts: 2
Joined: February 22nd, 2015, 9:10 pm
Division: C
State: WA
Location: Camas

Re: Wind Power B/C

Postby chozillla » May 15th, 2017, 8:51 pm

This is a question from an invitational and I still do not understand all parts of question 1. Can someone explain the answers for me? In return I will send you the full invitational test :)
Here's a link to the question: https://docs.google.com/document/d/17Ye ... sp=sharing
See you all in a few days in Ohio
Thanks
Camas High School Science Olympiad
2015 Anatomy & Physiology, Protein Modeling, Cell Biology

BigBrown
Member
Member
Posts: 14
Joined: February 28th, 2017, 11:57 am
Division: Grad
State: GA
Location: UGA

Re: Wind Power B/C

Postby BigBrown » May 20th, 2017, 11:29 pm

Hey anyone know wind power scores for the top at nats?

vjindal
Member
Member
Posts: 35
Joined: January 16th, 2016, 3:34 pm
Division: C
State: NY

Re: Wind Power B/C

Postby vjindal » May 21st, 2017, 7:25 am

Does anyone know what the best blades at nats looked like?
Were they lift-based?
Were they 3d printed?
What material were they made of?
Did they extend to the center of the CD or only near the outside?
2019:
Mousetrap
Wright Stuff
Sounds

MIT 2018:
Heli: 1st
Mousetrap: 6th

--- Helicopters --- https://youtu.be/nn-x44gB0oA
--- Robot Arm --- https://www.youtube.com/watch?v=gmHcG-bar7w&t=76s
--- Wind Power --- https://www.youtube.com/watch?v=603F7vPUbrg&t=34s

User avatar
Alex-RCHS
Member
Member
Posts: 532
Joined: November 4th, 2016, 3:46 pm
Division: C
State: NC
Location: Raleigh, NC

Re: Wind Power B/C

Postby Alex-RCHS » May 21st, 2017, 12:34 pm

Does anyone know what the best blades at nats looked like?
Were they lift-based?
Were they 3d printed?
What material were they made of?
Did they extend to the center of the CD or only near the outside?
I'm also curious to know this. Also, anyone know the top voltage scores?
About me!
Raleigh Charter HS (NC) 2018
UNC-Chapel Hill 2022

RestingDoll
Member
Member
Posts: 34
Joined: September 14th, 2016, 5:10 am
Division: C
State: PA

Re: Wind Power B/C

Postby RestingDoll » May 23rd, 2017, 8:44 am

Does anyone know what the best blades at nats looked like?
Were they lift-based?
Were they 3d printed?
What material were they made of?
Did they extend to the center of the CD or only near the outside?
I'm also curious to know this. Also, anyone know the top voltage scores?
We came in 8th with 335 on low and 593 on high. Test was also ok (@ shadow flicker lol).

soyuppy
Member
Member
Posts: 84
Joined: September 18th, 2015, 12:08 am

Re: Wind Power B/C

Postby soyuppy » May 23rd, 2017, 5:09 pm

Does anyone know what the best blades at nats looked like?
Were they lift-based?
Were they 3d printed?
What material were they made of?
Did they extend to the center of the CD or only near the outside?
I'm also curious to know this. Also, anyone know the top voltage scores?
We came in 8th with 335 on low and 593 on high. Test was also ok (@ shadow flicker lol).
Can't assume that the blade performance alone earn 8th place. There's also the testing part. The combine blade+test exam score = 8th place. No way to know how blade score stack up without seeing raw score...which is somewhat protected from public info.


Return to “2017 Lab Events”

Who is online

Users browsing this forum: No registered users and 1 guest