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Old May 05, 2004, 04:47 PM
Boss248
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To Round off...or no to Round Off..?

What are most people doing with the leading edges on flat foamy wings and stabs...are you leaving them flat or do you round them off...?

Boss
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Old May 05, 2004, 05:03 PM
nananabooboo!!
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United States, OK, Oklahoma City
Joined Mar 2003
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I round them up using a Walmart 3/16" dowel on the leading edge. Great protection against damage, just tape it over it with some .94" wide strapping tape. My camera ran out of batteries so I can post a real pic of my new "creation" using this method, so here's a simple drawing.
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Old May 05, 2004, 05:12 PM
nananabooboo!!
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Got batteries, here's the pics. Is a cross between a B-2 and ????? Don't know yet
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Old May 05, 2004, 05:17 PM
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San Jose, California
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Save your time. At the speeds that most bluecor models fly at, there's no aerodynamic advantage. Notice I said "most".

Planes like the 3DX use angle-of-attack for lift so there's no reason to round off the leading edge there either.

It depends on what you're building, but generally there's no need to round off the edges of a bluecor plane.

If you can afford the weight increase of a dowel it's a neat idea. IMHO, bluecor isn't made to last forever, and if my plane gets all banged up, I'll build a new one.

John
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Old May 05, 2004, 05:29 PM
Foam rules
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HdG Md.
Joined Jan 2003
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I'm with John on this one. Most arn't going to notice any differance betten a rounded leading edge and square. The smaller you get the more you will notice it and even at that its not that much of a issue. On smaller planes you will notice a MINOR hunt up and down but the larger, say 30" and over or small fast models its a non-issue. So cut some foam and don't worry about it. Once you have something flying you could give it a try and see if you notice a differance.
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Old May 05, 2004, 05:41 PM
Boss248
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Thanks to everyone for the info...both ways have thier place it seems.
Nieves...that is a really cool looking plane...has it flown yet..?
Boss
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Old May 05, 2004, 05:49 PM
nananabooboo!!
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United States, OK, Oklahoma City
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The protoype, yes (6 times, two layer for the fuse, electronics showing, etc.). This version, no. Waiting for the wind to die just a little more. I have to add that my reason for using a dowel for re-inforcement is that I don't get too much time (my job, the significant other & a 3 yr old son) to build, so I try to make the planes as light & durable as possible.
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Old May 05, 2004, 05:54 PM
Boss248
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What EPS are you using on the B-2...? Do you have a thread started on it already that I can read...?

Boss
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Old May 05, 2004, 06:10 PM
nananabooboo!!
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Sorry no thread or plans for this one. Is powered by a 350C "C", 9X7 prop, 7C CBP 1050. The motor pulls about 9.4 amp @ 100% so to help (maybe just a little) I added a heat sink on the motor and kept it exposed for better cooling. Also added protective "fins" at the bottom of the plane to save the prop & nose.
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Old May 05, 2004, 06:12 PM
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I have flown fan fold/depron planes both ways. I like the way the planes handle better with the LE left squared off.

Tim H.
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Old May 05, 2004, 06:14 PM
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Kalamazoo, MI USA
Joined Aug 2003
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Quote:
Originally Posted by Boss248
What are most people doing with the leading edges on flat foamy wings and stabs...are you leaving them flat or do you round them off...?

Boss
I like to round bluecor leading edges off by rubbing them with the side of a sharpie. I learned that trick from someone here.
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