nnSpeedWing - STRESS TEST

by nerdnic | July 7, 2015 | (10) Posted in Projects

Hey guys,

My SpeedWing design is featured in my nnMiG 3, nnA-10, and nnP-39, and is 2-.5cm thick. A similar strength design is used in all my designs, though. The design centers around a piece of flat aluminum that's 1/2" tall x 1/16" thick, length varies on the wing size but generally 20". Benefits of my wing are speed, strength, and little to no flex.

Since my nnMiG 3 I've made claims about how strong my wing is. I made claims that my SpeedWing design could handle repeated 100mph tight banked turns. And with those claims came people who doubted how strong my wing design was. How could a DTFB wing be strong? How could it pull that many Gs?

Knowing I had a winning design on my hands, I produced videos showing it in action. But even though I knew it could handle anything you could throw at it in the air, I've never known just how strong it actually was. 100mph banked turn with a 1000g plane has to be pulling a lot of Gs, right? How many Gs could the wing actually take before it failed?

So I put it to the test to see how much sheer weight my wings can hold. The results are amazing..

- Find this article & others like it at www.FliteTest.com -

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COMMENTS

Holski77 on July 7, 2015
Does that chair support the wing at the mean air chord? it needs to for a load test. Also, a point load at the center would be a more objective way to test max weight. The wider you dumbbells are the more weight you can stack on the wing
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grether2000 on July 7, 2015
Even with how he did test that is pretty good, but your right. The common way to test seems to be set the wing in a fuse cradle (upside down) then load the entire length of the wing with weights like small sand bags. This puts weight on all the surface and closer matches actual use. This will fail the wing where it might in flight. IE. in front or behind the spar, or out past the end of the spar.
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nerdnic on July 12, 2015
It's pretty close to the MAC. I didn't have a way to adjust the arms but I'm looking at some other ways to test.
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msh312b on July 7, 2015
I would like to see the plans for the nnA-10 split.( take the speed wing design out and have it separate) also if you could draw it ready for the laser that would be even more awesome. i.e. in Adobe Illustrator or Corel draw, then I wouldn't have to redraw over your plans to get it to cut right. Thanks for all your great plans, keep it up.
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nerdnic on July 12, 2015
Hey I'm not sure I follow - the nnA-10 speed wing is separate already. I've been working on my illustrator skills and I hope to have vector plans at some point in the future.
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AkimboGlueGuns on July 8, 2015
Aww, No rubber ducky on the wing tip?
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nerdnic on July 12, 2015
I don't understand.
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FTprime on July 8, 2015
how about testing positive gs also
ie. the same thing but upside down
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nerdnic on July 12, 2015
Good suggestion. It will definitely be less with the current design but could be slightly tweaked to be nearly as strong with little effort.
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Stingray Aviation on July 8, 2015
What airfoil do you use for the speed wing? What's your method for getting it accurate?
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nerdnic on July 12, 2015
Each wing is different. They are mostly a semi semitrical airfoil and are 100% reproducible based on the build technique. The familiar fold over is used and by following the exact bevel lines you'll end up with the same wing every time.
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Mayday-Joey on July 9, 2015
I think you are ready for a certain fly-in at the end of the month that involves high speed passes....

:-)


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nerdnic on July 12, 2015
What fly in is this? I'm not sure I follow :-)
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nicksta rc on July 10, 2015
can you make a p-40 please its my favorite plane
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nerdnic on July 12, 2015
P-40 would be sweet. Please if you can make the suggestion on my site nerdnic.com that would be awesome. It helps me keep track of all the requests.
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Krivak957 on July 12, 2015
Nic - Another nice video. There may be more accurate ways to measure ultimate wing loading, but your video is simple and proves that nn-speedwing is strong enough for most people.
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nerdnic on July 12, 2015
Hey thanks! It can definitely take anything you can throw at it in the air, that's for sure :-)
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Xerx on July 13, 2015
Hi nerdnic. Would you mind designing a 4 channel fpv pylon/basher plane based around the nnSpeedWing? Either a twin or a pusher with a dual boom tail. - See more at: http://flitetest.com/articles/nnspeedwing-stress-test#sthash.urWkIqQy.dpuf

Something similar to this, but with the speedwing design.
http://flitetest.com/articles/40-swappable-specter-an-ibcrazy-design
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nnSpeedWing - STRESS TEST