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Old Oct 10, 2014, 09:28 AM
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United States, UT, Salt Lake City
Joined Jan 2014
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Fuse/nose shape?

So i have a question for you guys concerning fuse/nose shape. i have noticed a few different styles in woodie nose shapes some come to a point like a boat bow , some are more of a blunt point shape, and others are really pointed. same goes for the fuse some stay true box shaped and other ether use thick balsa on the side and sand a radius into the fuse and other add triangle stringers and really sand the fuse. is there really that mush drag savings in all the extra work?
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Old Oct 10, 2014, 09:30 AM
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Joined Jan 2008
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salt:

The savings is in both weight and drag. My advice: round it out. Sandpaper is your friend when it comes to model airplanes.

For F3K, there is a minimum nose radius specified, for safety purposes.

Yours, Greg
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Old Oct 10, 2014, 04:34 PM
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Enschede, Netherlands
Joined Nov 2009
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Thanks Greg, right in time. had my foam pod almost ready to begin laminating, and now rounded the nose out like in the F3K specs. it was much pointier before as i took an airfoil as reference. The pod still looks decent to the eye.

found the minimum radius in the rules to be 7,5mm, and if you cut one quarter out of that circle it gives you the minimal surface for that curved nose piece.


I thought before there was also a minimal pod thickness to even out the competition, but i could not find anything about that, so i suppose as long as we respect the nose radius rule, we can build the rest of the pod as slim as we dare to go.
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Old Oct 10, 2014, 04:38 PM
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United States, UT, Sandy
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That minimum radious spec is actually quite a pointy nose
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Old Oct 10, 2014, 04:44 PM
Looptastic!
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Oops. for F3k it is 5mm. my bad. Shame i rounded my nose so much now ;/
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Old Oct 10, 2014, 06:46 PM
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Seattle, WA
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I think I need a picture. Is there a link somewhere for the rules on this? *Might* be making soe pods this winter...
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Old Oct 10, 2014, 08:28 PM
Looptastic!
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Enschede, Netherlands
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sure

http://www.f3k.nl/index.php?id=220&f...%202014def.pdf
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Old Oct 11, 2014, 03:11 AM
No slope for richardo
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Thanks man!
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