Vortex Generators

Discussion in 'Hangar Flying' started by rbrochey, Feb 8, 2017.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Feb 8, 2017 #1

    rbrochey

    rbrochey

    rbrochey

    Well-Known Member

    Joined:
    Oct 17, 2010
    Messages:
    1,503
    Likes Received:
    610
    Location:
    Gallup, New Mexico USA
    The only thing I could think of that won't close the thread...


    oops

    This thread is closed.
     
  2. Feb 8, 2017 #2

    bmcj

    bmcj

    bmcj

    Well-Known Member HBA Supporter

    Joined:
    Apr 10, 2007
    Messages:
    12,739
    Likes Received:
    4,729
    Location:
    Fresno, California
    ???
     
  3. Feb 8, 2017 #3

    rbrochey

    rbrochey

    rbrochey

    Well-Known Member

    Joined:
    Oct 17, 2010
    Messages:
    1,503
    Likes Received:
    610
    Location:
    Gallup, New Mexico USA
    Could be my new meds making me more irritable (you don't want to take this stuff, trust me) but it seems there's a lack of a sense of humor in here, especially (understandably) lately.... I love talking airplanes and I'm going (for the first time) to oshgosh this year and I hope to meet a few of you.. but it's okay to get off topic occasionally unless you think life is perfect and is always on topic... talking nuts and bolts all the time is boring. All work and no play kind of thing, but in here go off topic and you may be excommunicated... I was going to use the heading "FemaleVortx Generators"...then again... it could be the mitotane... anyway drinks are on me if we meet up in Wisconsin... apologies.
     
    bmcj likes this.
  4. Feb 8, 2017 #4

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,349
    Likes Received:
    3,271
    Location:
    Wisconsin
    Look forward to meeting you at Oshkosh.
     
  5. Feb 8, 2017 #5

    rbrochey

    rbrochey

    rbrochey

    Well-Known Member

    Joined:
    Oct 17, 2010
    Messages:
    1,503
    Likes Received:
    610
    Location:
    Gallup, New Mexico USA
    Same here! My brother-in laws wife is from Wisconsin, they now live in St Paul... but I wanted to look up Robin from Viking Aircraft, I bought the Cygnet plans from himand I wanted to discuss them welding up the fuselage for me if I can't do it.
     
  6. Feb 8, 2017 #6

    bmcj

    bmcj

    bmcj

    Well-Known Member HBA Supporter

    Joined:
    Apr 10, 2007
    Messages:
    12,739
    Likes Received:
    4,729
    Location:
    Fresno, California
    You need to tell them that they have to move back to Wisconsin... specifically Oshkosh, close to the airport. After all, you need a convenient place to stay and a source for transportation. :gig:

    If they don't move back, where are you going to invite your friends (hint, hint) to stay.
     
    rbrochey likes this.
  7. Feb 8, 2017 #7

    Turd Ferguson

    Turd Ferguson

    Turd Ferguson

    Well-Known Member

    Joined:
    Mar 14, 2008
    Messages:
    4,672
    Likes Received:
    1,635
    Location:
    Upper midwest in a house
    Well I'm disappointed as I am investigating vortex generators and I'm not sure which type I should get - AC or DC?? Single or three phase???
     
  8. Feb 8, 2017 #8

    bmcj

    bmcj

    bmcj

    Well-Known Member HBA Supporter

    Joined:
    Apr 10, 2007
    Messages:
    12,739
    Likes Received:
    4,729
    Location:
    Fresno, California
    They always say that VG's work in pairs, but every shark I've seen in the ocean only has one.
     
  9. Feb 8, 2017 #9

    Victor Bravo

    Victor Bravo

    Victor Bravo

    Well-Known Member

    Joined:
    Jul 30, 2014
    Messages:
    5,894
    Likes Received:
    4,718
    Location:
    KWHP, Los Angeles CA, USA
    SORRY for the thread drift-

    Speaking of the Cygnet... anyone here flown one? I volunteered to do the first flight on the Cygnet that our EAA chapter guys just finished. I already know that the airplane won a "best new design" award at an ancient Oshkosh event. The Ford Edsel also won a "best new design" award at some moment in history too.

    There's some relatively minor questionable stuff that I had complained about, and the answer back from the EAA builders was "well, we built it to plans." I told them to mention that at the funeral.

    For example, I noticed there was no fresh air vent at all for the cockpit.

    "We built it to plans...".

    That's nice... did you happen to notice that the engine exhaust stack was directly upstream of the opening in the bottom of the fuselage where the bungees go through?

    "We built it to plans... it won a best design award at Oshkosh"

    Put a $20 fresh air vent in, or a $1000 oxygen system, your choice.

    "Uhhh.... OK"

    Remember when I said you should look into building a swing-up or swing-back one piece canopy, because there is no safe way whatsoever for a pilot to bail out in a major emergency if it is built to plans (forward-opening gull wing doors less than 24 inches from the propeller) ?

    "Well, none of the other Cygnets have that, the designer must have had a reason for doing it this way."

    Fine, then I won't do anything in this airplane that could possibly require bailing out. No dive test, no spin test, no Va test.

    "We were never planning to dive or spin the airplane..."

    Remember when I said that since we didn't build the wings, and since there were some problems and repairs to the wing attach fittings on the upper longerons, we should turn the airplane upside down and do a "sandbag test" to prove out that it will take a 6G pull without breaking?

    "It won a best design award at Oshkosh..."

    Well then the first flight and any other test flight I do will be at 1G. You can do the flight load tests yourself.

    "We were never planning to put any more than 1G on the airplane..."
     
    rbrochey likes this.
  10. Feb 9, 2017 #10

    Nemo

    Nemo

    Nemo

    Well-Known Member

    Joined:
    Nov 4, 2016
    Messages:
    58
    Likes Received:
    10
    Location:
    Hartford, Wisconsin
    So you can't have more than a 30 degree bank? How about accelerating or decelerating?
     
  11. Feb 9, 2017 #11

    Pops

    Pops

    Pops

    Well-Known Member

    Joined:
    Jan 1, 2013
    Messages:
    6,932
    Likes Received:
    5,845
    Location:
    USA.
    There is a nice yellow Cygnet in around the Columbus, Oh area somewhere, I have seen it at fly-ins two times. I talked to the owner last year and it had a 2180 VW engine. Older man about 65 years old and his teenage grandson. Nice airplane. I watch it leave and it climbed out good with 2 good size people.
    I still have the infro packet I bought on the Cygnet when the plans was first put on the market.
     
  12. Feb 9, 2017 #12

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,440
    Likes Received:
    3,176
    Location:
    Memphis, TN
    There was a Cygnet at last year at Oshkosh. Not bad for something different. I dont think getting out without jettisonable doors would be easy. Flip back canopy on that thing would probably take it out of the air if it opened in flight. Looked like a challenge just to get in.
     
    Little Scrapper likes this.
  13. Feb 9, 2017 #13

    Kevin N

    Kevin N

    Kevin N

    Well-Known Member

    Joined:
    Jan 23, 2015
    Messages:
    819
    Likes Received:
    465
    Location:
    Your Moms basement
    Pretty sure the Cygnet Pops is referring to was built by Don Koons, now deceased. It is a nice airplane. There is youtube videos of it. N81DK. I was going to get a ride from Don but he passed on unexpectedly. I did sit in it once and once you learn where to step and grab its no problem getting in and out. I think if I wanted a two seat VW powered airplane it would be my choice. I have the plans for it and they are pretty good.
     
    Little Scrapper likes this.
  14. Feb 9, 2017 #14

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,349
    Likes Received:
    3,271
    Location:
    Wisconsin
    I like that cygnet. Why are the wings canted forward? Does that create a unique or potential flying issue? It just seems odd.

    It looks lIke a fun airplane.
     
  15. Feb 9, 2017 #15

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,349
    Likes Received:
    3,271
    Location:
    Wisconsin
    Kevin, what is the cabin width?
     
  16. Feb 9, 2017 #16

    Pops

    Pops

    Pops

    Well-Known Member

    Joined:
    Jan 1, 2013
    Messages:
    6,932
    Likes Received:
    5,845
    Location:
    USA.
    I thought the same thing, a good 2 place VW powered airplane that has enough wing area and low weight and big enough for 2 smaller people.

    I checked youtube, its the same one I saw at Lee Bottom and Wynkoop.
     
  17. Feb 9, 2017 #17

    Turd Ferguson

    Turd Ferguson

    Turd Ferguson

    Well-Known Member

    Joined:
    Mar 14, 2008
    Messages:
    4,672
    Likes Received:
    1,635
    Location:
    Upper midwest in a house
    center of gravity
     
    Little Scrapper likes this.
  18. Feb 9, 2017 #18

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,349
    Likes Received:
    3,271
    Location:
    Wisconsin
    Nice looking airplane for sure. Looks like it might be snug for two people.
    20170208_223011.jpg
     
  19. Feb 9, 2017 #19

    Kevin N

    Kevin N

    Kevin N

    Well-Known Member

    Joined:
    Jan 23, 2015
    Messages:
    819
    Likes Received:
    465
    Location:
    Your Moms basement
    I would say the Cygnet is similar to a Cessna 150 in the cabin. The wings are unique being lattice construction with just 8 routed ribs per side. With single strut and no wing tanks the owner of 81DK would pull the wings in the winter and take the airplane home.
     
    Little Scrapper likes this.
  20. Feb 9, 2017 #20

    lr27

    lr27

    lr27

    Well-Known Member

    Joined:
    Nov 3, 2007
    Messages:
    3,216
    Likes Received:
    464
    I think the wing root is pushed back for visibility. So then the sweep forward is necessary, as Mr. Ferguson says, for correct c.g. This dodge has been used in a number of 2 place sailplanes.
    harbinger 3vuesgr.jpg
     
    Little Scrapper likes this.

Share This Page

arrow_white