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Single wing

Discussion in 'Single Wing Aircraft Plans' started by Gefahren, Aug 6, 2009.

  1. Gefahren

    Gefahren Member

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    Here's the single ribbed wing I did based on the style used in the PhlatFoil. Since I don't have a Phlatprinter yet, I haven't tested this yet, but I've added the corrections that Mark suggested when he cut one out. This wing isn't a plane in itself so I'm not sure if this is the right spot to put it. I designed it as a simple 'standard' wing I could put on different aircraft. It's made to have two 1/4" carbon tubes inserted through at least two ribs on one end or the other. Then you could slide the wing on some rods going through the airframe of whatever craft you put them on. Feel free to give me some feedback on this, I'll try correcting anything that's wrong with it. But until I get my MKII I won't know unless you tell me.

    Attached files SelfRibbedWing.cnc (25.6 KB)Â [​IMG] SelfRibbedWing.skp (1023.6 KB)Â
     
  2. meistertek

    meistertek Member

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    This is a nice design, it's going to be surprisingly strong. The only suggestion I have is to make sure to account for the foam thickness, and also the fact that blue foam with skin on one side, depron, and possibly other foams hold their dimension on the skin opposite the grooved (routed) side of the foam. That means all your dimension on the inside of the wing will shrink. This isn't as big as a deal as it sounds, you'll see this effect when you cut and assemble your first wing, and then you can adjust anything that is off before you cut the second wing and assemble it. Here are some photos of similar foam wing build ups I did a while back on some of my plane designs:

    http://picasaweb.google.com/MeisterTek/PrizmReconAircraft?authkey=Gv1sRgCMu0xYP128_BnAE#
    http://picasaweb.google.com/MeisterTek/PrizmOne#
     
  3. Anonymous

    Anonymous New Member

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    That's a nice design, and thanks for posting it! :)
    Although I don't have the time for running my PP right now (too much work to do on my work-shed), I have taken advantage of the privilege of downloading it. ;)
     
  4. Gefahren

    Gefahren Member

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    Mark cut a prototype of this wing out before he left and I used what he came up with to adjust everything for the foam thickness. It may need more adjustment, but it should be much closer now than it was.

    I'm working on another project at the moment, but as soon as I get done with it I will make a full fuselage trainer stlye plane that uses a set of these wings.
     
  5. kram242

    kram242 Administrator Staff Member

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    Gefahren,
    I will cut this wing again now that you have run though with corrections. Let's see how she turns out. Ill post here when I complete the cut.
    Thanks again for posting this its going to be a really nice design too once you have the entire aircraft. Do you think you will have different body styles to attach to this wing as well ?
    Very cool stuff! :)
    Mark
     
  6. Gefahren

    Gefahren Member

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    I was going to start out with two different bodies for the wing, a trainer like high wing, then a mid or low wing style. I also wanted to do a bi-plane, but haven't really thought about any of the connections for that. The only real problem I see is getting dihedral in the wings. I was thinking of modding the wing slightly to make it a left or right by switching the place of the main carbon tube and the wing spar. that way the rods from the fuselage could cross each other and therefore be set at an angle. (reading that back to myself, I'm not sure I made any sense.. Nyquill talking)
    I did figure out a fowler flap for it with a little extra work, And I think that I should add a marked place for a mini-servo in it. And just in the back of my head I put together a plane using 4 of these wing sections to make a 12ft wing span candy bomber, but I don't know if it would hold up to the stress, would look cool.
     
  7. kram242

    kram242 Administrator Staff Member

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    That's a great idea, you could just keep chaining them together :)
    For the dihedral you may want to just have little flaps on each end that are the last fold and they sit at and angle against the wing? That would allow you to stay consistent with the all from one piece theme.
    Can't wait to see the body's, are going to try and have them out of one piece as well? Maybe you could fold the rib sections up from the bottom?
    Just an idea
    Mark
     
  8. TigerPilot

    TigerPilot Well-Known Member

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    With the right spar, Gefahren, it will work fine with 12' span. Two 3/8" tubes and it will fly like a charm. I want some of those candies. :D
     
  9. kram242

    kram242 Administrator Staff Member

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    Ok I cut it out and made a really quick short video of it going together.
    Everything worked out great with the exception of the very little cut along the back edge of the wing, opposite side to the flaps. Its really lining up well now. I love the tabbed foam spar! This new design seem much more solid. I think this is a great design and it is incredible to me that you were able to get it right within two tries without ever having cut one out to test it. And your code comes out really nice and clean. Even the cut orders are right. Just incredible. Nice job on this project. All you need now is the Phlatprinter to start knock out these cool designs :)
    Here is the video
    I also posted this in the Phlatfoil thread since it is a variant
    Here is the thread http://www.phlatforum.com/viewtopic.php?f=34&t=916&start=0
    Keep up the good work, cant wait to the the planes for this bad boy.
    Mark
     
  10. Gefahren

    Gefahren Member

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    Folding the fuselage out of one piece or two like the wing does sound really interesting. It would limit the lenght of the fuselage to 42" for the blue foam. But I'm sure I could get a few more inches for the tail hangin off the back and the motor hanging on the front. I think I'd fold the formers in from the sides instead of from the bottom, doing them in left right pairs that fold opposite directions and hook into each others cutout, kinda forming a box shape. Hmm, if my head wasn't so stuffy I'd probably start on that now, but it's gonna have to wait untill I can think, and breath. I think I'll do it as a taildragger, that's easier since the firewall can be the mount for the landing gear too, think of those old timer planes with the wheels on either side of the prop. hmm, brain trying to work... I'll try posting a 'concept' picture tommorrow evening.
     
  11. kram242

    kram242 Administrator Staff Member

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    Not necessarily if you do a little dove tail male/female connection you can join as many pieces of foam together as you like. I built the C-17 that way and it works great.
    I like the idea of the old timer plane.
    Looking forward to your concept pics
    Mark
     
  12. Gefahren

    Gefahren Member

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    Well, it took me longer than expected to get anything together for a 'concept'. Alot going on here with everyone getting sick and my car breaking, Ahh well.. Anyways I think I decided against some of the old-timer style. They all look like boxes in cross section and curved airplanes should be fairly easy on the phlatprinter. So it's ended up looking more like a generic cessna. I am setting things up to either be a tail dragger or a tri-gear plane. Of course I had planned on ordering a MKII on tuesday the 18th (my birthday) but with the doctor bills for my wife and daughter(the things they bring home from daycare...) and now I have to have a new CV axle in my car it looks like I'm gonna have to wait another month :cry: At least this way my wife won't get jealous that my present to myself cost more than my present to her (her birthday is tuesday also).

    Got some more work done while watching mark try to get the surferdude out of the tree. Attached files [​IMG] [​IMG]
     
  13. kram242

    kram242 Administrator Staff Member

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    Gefahren , This great looking it has a really nice flow. Man that stinks about your car. I remember when I had one of my first cars a Nissan Pulsar. The CV joints went on that one and I knew nothing about cars. But being a kid really wanting to get my ride back on the road and with very little moneys I decided to do it myself. It ended up taking me two weeks to complete the job!
    I learned a lot for that experience.
    any-who, enough of my ramblings :)
    I am guessing that you are not going with a one piece fuse here that includes the ribs?
    This is going to be a big plane if the wing is going to be two of them from the original cut, is that right?
    Looking good Gefahren
    Mark
     
  14. Gefahren

    Gefahren Member

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    Well, I'm in a little luck with my car. My brother is a Master Certified Nissan tech, who just became a Matco tool guy. Also the general manager where I work restores cars as a hobby. So I have access to all the advice I could hope for.

    Yea, It will be about a 76" wingspan when it's done sorta close to one of those senior telemasters. I'm still workin on how to make the formers, or partial formers be cut from the 'shell' of the fuselage, but right now just the shell is one piece. Although to make it fit on a 42" piece of foam I'm gonna have to split it in two. Should be a relaxing slow flyer. I did come up with a way to make all the formers part of the fuselage before I started making it all rounded, I'll probably use that on an aerobatic plane at a later date.
     
  15. kram242

    kram242 Administrator Staff Member

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    Gefahren,
    That's really cool that you have a brother that can help you with that.

    This is going to be a great plane to relax and fly with. I have never flown a plane with a wingspan that size so that will be a treat. :)
    How are you making out on the slow-fly one piece version of the fuse?
    Mark
     
  16. Gefahren

    Gefahren Member

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    Well, my brother helped all he could on my car, but the CV axel turned out to be in perfect condition, it was the transaxel that broke, I lost some teeth out of the differential. So instead of putting money into a 13 year old 4 cyl. 90 hp sub compact I had to bite the bullet. NOW, I have a Ford Expedition, V8, 300hp, ect.. ect.. Feels like I have all the room in the world, I can HAUL airplanes instead of just packing ONE in. I'm happy with the upgrade but I had to use my Phlatprinter money for the downpayment and tag, ect... So now I'll have to wait till Christmas.

    As far as the one piece fuse, I trashed the sketchup file of what I had and am redoing it from scratch, I promise to post it by this weekend, I got distracted by a new computer game from my birthday and haven't done any work on it since then, but I've already beat the game now so back to work for me!
     

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