Wright Stuff B
- Tailsfan101
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Re: Wright Stuff B
Now I'm not in Wright Stuff, but I'd like to congratulate Huntington Middle School from West Virginia on their HUGE upset, for a team that finished 55th overall this year, to actually win an event at Nationals is amazing. Huntington has proved that just about anyone can succeed at Nationals, no matter what the school. They were sitting right behind my team at the awards and they were EXTREMELY shocked at winning. Amazing job Huntington!
"Blessed are you when people insult you and persecute you, and falsely say all kinds of evil against you because of Me. Rejoice and be glad, for your reward in heaven is great; for in the same way they persecuted the prophets who were before you." Matthew 5:11-12
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Re: Wright Stuff B
Attached is the link to Huntington Middle Schools first place flight (thanks to Dave and Eileen Ziegler for the video)
https://youtu.be/3h8CiLv9iwE
https://youtu.be/3h8CiLv9iwE
- Tailsfan101
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Re: Wright Stuff B
Wow, that's an amazing fight!wlsguy wrote:Attached is the link to Huntington Middle Schools first place flight (thanks to Dave and Eileen Ziegler for the video)
https://youtu.be/3h8CiLv9iwE
"Blessed are you when people insult you and persecute you, and falsely say all kinds of evil against you because of Me. Rejoice and be glad, for your reward in heaven is great; for in the same way they persecuted the prophets who were before you." Matthew 5:11-12
I have no regrets.
I have no regrets.
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Re: Wright Stuff B
I have seen this particular Wright Stuff design (viz. no rudder, no dihedral, but tiny wingtips on both main wing and stabilizer) do very well at competitions and I am wondering if anyone knows where the original design came from or why it seems to work better than a more traditional design (dihedral on main wing and rudder)?wlsguy wrote:Attached is the link to Huntington Middle Schools first place flight (thanks to Dave and Eileen Ziegler for the video)
https://youtu.be/3h8CiLv9iwE
- bernard
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Re: Wright Stuff B
It is a very common design used in free flight. We would probably have to go back many, many decades to identify when it was first used.Crtomir wrote:I have seen this particular Wright Stuff design (viz. no rudder, no dihedral, but tiny wingtips on both main wing and stabilizer) do very well at competitions and I am wondering if anyone knows where the original design came from or why it seems to work better than a more traditional design (dihedral on main wing and rudder)?wlsguy wrote:Attached is the link to Huntington Middle Schools first place flight (thanks to Dave and Eileen Ziegler for the video)
https://youtu.be/3h8CiLv9iwE
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Re: Wright Stuff B
I was fortunate to provide the plan and instructions (and a little mentoring) to the Huntington WV team this year. The plan was based on the "Leading Edge 10" originally designed by the late Cezar Banks for Peck Polymers. Obviously the size was adjusted for the rules this year. I looked back in the 2010 Scioly forum but none of the links work anymore.bernard wrote:It is a very common design used in free flight. We would probably have to go back many, many decades to identify when it was first used.Crtomir wrote:I have seen this particular Wright Stuff design (viz. no rudder, no dihedral, but tiny wingtips on both main wing and stabilizer) do very well at competitions and I am wondering if anyone knows where the original design came from or why it seems to work better than a more traditional design (dihedral on main wing and rudder)?wlsguy wrote:Attached is the link to Huntington Middle Schools first place flight (thanks to Dave and Eileen Ziegler for the video)
https://youtu.be/3h8CiLv9iwE
As far as working better, I can't say it does. The flat wing with no dihedral would theoretically provide more lift than a wing with regular dihedral but I don't know. It is a little easier to build since you build a flat section and then add the winglets.
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Re: Wright Stuff B
The theory behind vertical wing fences is that it reduces the wingtip vortex of a conventional wingtip, a huge source of drag.
As a practical matter, they have to be very precise to actually eliminate the vortex and not add drag from being misaligned and snowplowing through the air.
And, they act exactly like dihedral, they are just an extreme form. Theoretically the best shape for dihedral is a wing with a half ellipse form when viewed from front or rear. But the difference in drag/effectiveness isn't generally worth the construction difficulties.
Simplest dihedral is single break in middle of wing.
Next is two breaks, flat center and tips lifted. The tip fences are just an extreme form of this wing. I've personally verified this (by accident, not intentionally) by building a plane one year with the tip fences down. It consistently flipped over on launch (when it didn't crash) and flew 'up side down' with the tips up!
Next is three breaks, center and two outer. Two outer breaks are above center break, and tips above that.
And you can continue.
Jeff Anderson
Livonia, MI
As a practical matter, they have to be very precise to actually eliminate the vortex and not add drag from being misaligned and snowplowing through the air.
And, they act exactly like dihedral, they are just an extreme form. Theoretically the best shape for dihedral is a wing with a half ellipse form when viewed from front or rear. But the difference in drag/effectiveness isn't generally worth the construction difficulties.
Simplest dihedral is single break in middle of wing.
Next is two breaks, flat center and tips lifted. The tip fences are just an extreme form of this wing. I've personally verified this (by accident, not intentionally) by building a plane one year with the tip fences down. It consistently flipped over on launch (when it didn't crash) and flew 'up side down' with the tips up!
Next is three breaks, center and two outer. Two outer breaks are above center break, and tips above that.
And you can continue.
Jeff Anderson
Livonia, MI
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Re: Wright Stuff B
Thanks. That makes sense. But what should we pay attention to make the wing fences "precise"?jander14indoor wrote:The theory behind vertical wing fences is that it reduces the wingtip vortex of a conventional wingtip, a huge source of drag.
As a practical matter, they have to be very precise to actually eliminate the vortex and not add drag from being misaligned and snowplowing through the air.
Jeff Anderson
Livonia, MI
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