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  1. W

    Pros and Cons on Composites vs Aluminum

    Finally, I have received an internet diagnosis, by some unknown random person. Free of charge! Let me guess, you are a disciple of the insane clown possie, right? I am very lucky, I have engineering support. Anything that you see on the 1 Sky Dog thread has the bosses approval. The boss is an...
  2. W

    1 Sky Dog

    That is a lot of good advice I appreciate it and I appreciate your imput
  3. W

    1 Sky Dog

    I have been thru about 4 interactions of the challenging to design 1 Sky Dog. Steel tube Bolted alum tube Lightened extruded polystyrene sandwich Carbon fiber tube I choose carbon tube on 40psi polystyrene core. Today I learned the tube will be square or rectangular in section, hand layup on...
  4. W

    Pros and Cons on Composites vs Aluminum

    I believe I will accept the weight penalty and leave the foam solid core, but you got it! route out some polystyrene tube and have at it with uni and bid.
  5. W

    Pros and Cons on Composites vs Aluminum

    You haven’t fully described the task. You can’t approach me in composite design😎
  6. W

    Pros and Cons on Composites vs Aluminum

    I fully described it in my statement, I know that box your in is thick walled, try to find an sharp object to chop your way through it yea, I can sketch it out, and a sketch is a good way to describe the reinforcement attach, in addition a dimensioned drawing for the bolt attachments by phenolic...
  7. W

    Pros and Cons on Composites vs Aluminum

    I have studied this method in the past. I think it has merit. maybe I will explain, so you have the similar kitfox fuselage dimensioned out and ready to go. Build the entire fuselage as a plug, out of extruded polystyrene. Apply uni, bid, chopped carbon fiber to obtain the cluster you are...
  8. W

    Scotch weld DP-420

    I gotta think about it some more. I will make a drawing. I am not fond of the assembly method either. You espoused a method a while back that has stuck with me, for a carbon tube fuselage, four separate frames on a caul plate, but I had trouble with the assembly. All the bracing members have to...
  9. W

    Scotch weld DP-420

    This is a recommended adhesive for cfrp. Something like 4000psi in peel. Straight shear. That is very strong. Would you fly your cfrp fuselage if each tube in the cluster only had 50% fiber reinforcement across the joint, and then bonded with DP-420? Let me quantify a bit further, an ultralight...
  10. W

    Pros and Cons on Composites vs Aluminum

    I would like to see the details of one of the nodes I could not solve it, I could get 50% of each tube anchored to the longeron with uni, but that still leaves the other 50%. Big difference between a bond and fiber across the joint. There has been a pretty lengthy discussion on here before, I...
  11. W

    Pros and Cons on Composites vs Aluminum

    Homebuilders need more information and discussion about composite construction. When I start I will post pics of my project. More discussion,pics, how to’s, tests. The more the merrier. Can’t get enough. Reference material Utube video reference.
  12. W

    Pros and Cons on Composites vs Aluminum

    I am in an attached single car garage and it’s small but I am making it work. I keep my eye on the prize, so I cheerfully move, disassemble, haul out to the shed, whatever it takes. Happy Camper
  13. W

    Beast Horus

    Congratulations VERY impressive
  14. W

    Pros and Cons on Composites vs Aluminum

    Point taken Please wear some long underwear
  15. W

    Pros and Cons on Composites vs Aluminum

    I believe that you misread my post, I mentioned that a scale is needed An electronic postal scale can be purchased for $50. Dont trust it’s accuracy, pick up a steel nut in your junk drawer, mark it as a test weight, go ahead a get another one a little larger and mark it as well. Take them to...
  16. W

    methyl methacrylate (MMA)

    So, simply provide a method that precludes oxidation from entering the bonded aluminum joint where MMA is utilized
  17. W

    Pros and Cons on Composites vs Aluminum

    You stated you are not a composites guy, fair enough. The “tools“ i listed ARE basic composite tools, in any hands. I am compelled to shoot down crap about composite construction. Composites are the easiest materials of all, to work with. A pair of scissors and a paint brush. Properly mixed...
  18. W

    Pros and Cons on Composites vs Aluminum

    I just saw this and feel that I should respond A carbon and polystyrene foam airplane can absolutely be built in a garage @ home by anyone. Don’t deter others that might want to drag themselves out of the stone ages, you are emulating the stick in the mud effect. NO special tools are required...
  19. W

    Neutrino Microlight Sailplane

    Lol, what kind of sandpaper are you using?
  20. W

    Pros and Cons on Composites vs Aluminum

    There ain’t no freezer required to build a first class carbon fiber airplane. Excess resin is very easy to control, weigh the reinforcement then mix up that weight in resin. Too easy. Let’s list the equipment requirements for composite construction. A chip brush and a pizza wheel, a pair of...
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