Mock up suggestions......

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by MadProfessor8138, Jul 4, 2019.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Jul 4, 2019 #21

    akwrencher

    akwrencher

    akwrencher

    Well-Known Member HBA Supporter

    Joined:
    Oct 16, 2012
    Messages:
    1,071
    Likes Received:
    369
    Location:
    Gustavus, AK
    Hey, someone has to hold the camera, right?
     
  2. Jul 4, 2019 #22

    Hephaestus

    Hephaestus

    Hephaestus

    Well-Known Member

    Joined:
    Jun 25, 2014
    Messages:
    878
    Likes Received:
    184
    Location:
    YMM
    Lol, around here it's someone needs to wear the white hardhat ;) that's a mandatory requirement for any project.
     
  3. Jul 5, 2019 #23

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,128
    Likes Received:
    1,571
    Location:
    North Carolina
    So it's either a Wartbat, or an Ultrahog?
     
  4. Jul 5, 2019 #24

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,128
    Likes Received:
    1,571
    Location:
    North Carolina
    And your beer.
     
    akwrencher likes this.
  5. Jul 5, 2019 #25

    keefer66

    keefer66

    keefer66

    Member

    Joined:
    Feb 21, 2009
    Messages:
    13
    Likes Received:
    0
    Location:
    myerstown pa US of A
    find a lumber yard/lumber mill and get some materials to make 3/4" square stock from , use wood glue or hot glue to join
     
  6. Jul 5, 2019 #26

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,278
    Likes Received:
    3,095
    Location:
    Memphis, TN
    I think the real answer is a whole bunch of different stuff.
     
  7. Jul 5, 2019 #27

    MadProfessor8138

    MadProfessor8138

    MadProfessor8138

    Well-Known Member

    Joined:
    Nov 4, 2015
    Messages:
    469
    Likes Received:
    198
    Location:
    Ekron,Kentucky
    Pictsidhe......2 seperate/different designs that I've been working on.....not a combination of both.
    2 planes........

    Kevin
     
  8. Jul 5, 2019 #28

    bmcj

    bmcj

    bmcj

    Well-Known Member HBA Supporter

    Joined:
    Apr 10, 2007
    Messages:
    12,610
    Likes Received:
    4,642
    Location:
    Fresno, California
    IF you go with wood, does it have to be round stock? Seems like you could make it out of square stock for the desired purpose (mock up) and the square will be easier to joint up.
     
  9. Jul 5, 2019 #29

    vhhjr

    vhhjr

    vhhjr

    Active Member

    Joined:
    Jun 29, 2003
    Messages:
    31
    Likes Received:
    23
    Early in the Facetmobile program a reduced scale airframe was built from PVC pipe. The fishmouthing on the tubes was done on a CNC router table that had a rotary axis added. One could also do fishmouthing with a spindle sander that can be bought fairly reasonably or one can make one using a drill press and a sandpaper wrapped dowel. The corners on this mockup were held together with riveted gusset plates. One could also glue them with pvc cement, but you have to hold the joint together with duct tape while the glue dries.
     

    Attached Files:

  10. Jul 5, 2019 #30

    MadProfessor8138

    MadProfessor8138

    MadProfessor8138

    Well-Known Member

    Joined:
    Nov 4, 2015
    Messages:
    469
    Likes Received:
    198
    Location:
    Ekron,Kentucky
    bmcj.....I would rather stick with "round" no matter which way I go....wood or metal.
    If I can find the exact size material ,for the mock up, that I will be using in 4130 tubing when I build the real airframe...then there should be no guess work at all when it comes to the expensive material.
    Every brace,bracket,engine mount,,bolt hole,bolt,etc...will have been worked out on the mock up using the same hardware that is now going on the 4130 airframe.

    Kevin
     
    akwrencher likes this.
  11. Jul 5, 2019 #31

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,128
    Likes Received:
    1,571
    Location:
    North Carolina
    If you want exact size material, PVC is probably out. The plumbing stuff comes in only certain sizes. Perhaps an industrial supplier has others.
    I'd be looking into making my own dowels as it would do away with sourcing particular sizes in the quality you want.
     
  12. Jul 5, 2019 #32

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,128
    Likes Received:
    1,571
    Location:
    North Carolina
    Somebody warn Fritz about these images. I fear that they could trigger his CMD.
     
  13. Jul 5, 2019 #33

    Hot Wings

    Hot Wings

    Hot Wings

    Well-Known Member HBA Supporter

    Joined:
    Nov 14, 2009
    Messages:
    6,063
    Likes Received:
    2,047
    Location:
    Rocky Mountains
  14. Jul 6, 2019 #34

    Lendo

    Lendo

    Lendo

    Well-Known Member

    Joined:
    Feb 7, 2013
    Messages:
    287
    Likes Received:
    45
    Location:
    Brisbane
    Mad-P 81,
    Doesn't matter what your designing or building you will get a lot of assistance on HBA, some VERY talented people on here. Sometimes intent is lost where suggestions may be misinterpreted as criticisms.You may have to grow a thick skin and no one here can see a RED face :).
    George
     
    pictsidhe likes this.
  15. Jul 6, 2019 #35

    MadProfessor8138

    MadProfessor8138

    MadProfessor8138

    Well-Known Member

    Joined:
    Nov 4, 2015
    Messages:
    469
    Likes Received:
    198
    Location:
    Ekron,Kentucky
    Hot Wings.....you know,I had actually considered that option but steered clear of it for a few reasons,even though you are correct about the sizes being just about ideal.
    1. Cost
    2. The difficulty to actually drill it for bolts and such....I want to actually attach everything that will be bolted to the real airframe.
    3. The difficulty to attach one tube to another like it is welded...I've heard of people having good luck gluing the tubes together but I'm not one of those guys.
    I also want to sit in the mocked up airframe and try it on for size.
    4. Cost

    Kevin
     
  16. Jul 6, 2019 #36

    MadProfessor8138

    MadProfessor8138

    MadProfessor8138

    Well-Known Member

    Joined:
    Nov 4, 2015
    Messages:
    469
    Likes Received:
    198
    Location:
    Ekron,Kentucky
    Lendo.....I absolutely agree that some very talented individuals frequent this forum.
    And I do have an extremely thick skin....but I tend to walk away when the discussion turns from figuring out a resolution to a few design issues to stuffing a v8 into the fuselage while driving 2 separate props through independent gearboxes,or stuffing a huge diesel engine into the fuselage while driving 2 separate electric motors in a ducted fan setup,and my favorite....it has to have a functioning gatling gun in the nose to mimick the original for cg purposes or it wont fly right and you're gonna kill yourself.
    While these delusions ARE QUITE HUMOROUS,I dont have time to waste feeding into someone's Walter Mitty day dreams.
    I have 2 designs drawn out that I would be more than happy to give the plans away for free if I could figure out the few issues....

    Kevin
     
  17. Jul 6, 2019 #37

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,128
    Likes Received:
    1,571
    Location:
    North Carolina
    Only a few? You must be way more talented than the rest of us ;)
     
  18. Jul 7, 2019 #38

    Lendo

    Lendo

    Lendo

    Well-Known Member

    Joined:
    Feb 7, 2013
    Messages:
    287
    Likes Received:
    45
    Location:
    Brisbane
    pictsidhe,
    You snatched the words right out of my mouth, 15 years and I'm still trying to find accuracy.
    George
     
  19. Jul 7, 2019 #39

    MadProfessor8138

    MadProfessor8138

    MadProfessor8138

    Well-Known Member

    Joined:
    Nov 4, 2015
    Messages:
    469
    Likes Received:
    198
    Location:
    Ekron,Kentucky
    Lol.....probably no more talented than anyone else on this forum,however,I'm very persistant and I do a lot of research.
    But there are times that I just can't seem to find a viable answer to an issue with the information that I'm able to gather.

    So,at this point.....both designs have a few issues that I'm still trying to gather information to resolve.

    Kevin
     

Share This Page

arrow_white