Ducted fan aircraft

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by jthunt, Mar 17, 2012.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Nov 10, 2013 #161

    danmoser

    danmoser

    danmoser

    Well-Known Member

    Joined:
    Feb 1, 2010
    Messages:
    631
    Likes Received:
    186
    Location:
    Sandy, Utah, USA
    I disagree.
    Performance breakthroughs are usually driven by factors other than practicality.
    Many times, it's just some guy trying to do something different, or break some sort of meaningless record.. not necessarily for fame or fortune .. just for the personal satisfaction.. if it occasionally turns out to be practical too, all the better.

    Racing competitions with cars and planes have been the source all sorts of terrific innovations, yet winning a race is not an exercise in practicality.
     
  2. Nov 10, 2013 #162

    Doggzilla

    Doggzilla

    Doggzilla

    Well-Known Member HBA Supporter

    Joined:
    Jun 2, 2013
    Messages:
    2,047
    Likes Received:
    438
    Location:
    Everywhere USA
    To the contrary, that is a wives tale. If you check out almost any modern feature in a car, almost none debuted in racecars or prototype/racing aircraft. The whole problem with aircraft is that we spend absurd amounts on almost no performance gain, or performance that only matters on paper, and makes the other operational features worse.

    Burt Rutan didnt change aviation by thinking as complex as possible, he constantly talks about simplification, and how anybody can make something work by being complex...but a good design is as simple as possible. Same with the skunk works, they keep it as simple and cheap as possible. The first pair of stealth aircraft cost only $35 million for the entire program, and was created by a few guys who kept it as practical as possible.

    There is a video on the MIT site about how almost all innovation comes from users who modify their equipment, not from professionals competing. Practicality creates most innovation. Aviation has to learn this sooner or later.
     
    akwrencher likes this.
  3. Nov 10, 2013 #163

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  4. Nov 20, 2013 #164

    DangerZone

    DangerZone

    DangerZone

    Well-Known Member HBA Supporter

    Joined:
    Sep 5, 2011
    Messages:
    2,107
    Likes Received:
    373
    Location:
    Zagreb HR
    Hey Malish, is there any site where we could follow your daily progress? I really like your project...
     
  5. Nov 21, 2013 #165

    Malish

    Malish

    Malish

    Well-Known Member

    Joined:
    Oct 11, 2013
    Messages:
    480
    Likes Received:
    786
    Location:
    Russia. City of Volgograd
    Well, the only one is on Russian EAA forum. Henryk posted link to it somewhere on earlier pages. But it in Russian. Don't have time to write on both forums. But is soon we will get to final assembly and testing. I will post progress in here. Sorry...
     
    DangerZone and Doggzilla like this.
  6. Nov 21, 2013 #166

    Doggzilla

    Doggzilla

    Doggzilla

    Well-Known Member HBA Supporter

    Joined:
    Jun 2, 2013
    Messages:
    2,047
    Likes Received:
    438
    Location:
    Everywhere USA
    Good luck! And if you post a link, most of us have automatic translators in our browsers...
     
    henryk likes this.
  7. Nov 21, 2013 #167

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  8. Nov 23, 2013 #168

    DangerZone

    DangerZone

    DangerZone

    Well-Known Member HBA Supporter

    Joined:
    Sep 5, 2011
    Messages:
    2,107
    Likes Received:
    373
    Location:
    Zagreb HR
  9. Nov 24, 2013 #169

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  10. Mar 7, 2014 #170

    Malish

    Malish

    Malish

    Well-Known Member

    Joined:
    Oct 11, 2013
    Messages:
    480
    Likes Received:
    786
    Location:
    Russia. City of Volgograd
    We started the final assembly of PJ-II Ducted fan aircraft. To save the time(and money too) we decided to make temporary(none retractable) main landing gear to begin initial flight testing. Because our main goal is to test propulsion system first, and none retractable gear will not do much to aircraft performance itself. Because the mains, we also decided to make front gear none retractable too(it was retractable). We disconnected electric actuator and replaced well doors with cover.

    You can follow progress on Russian EAA website, starting from post #140 on February 28th(28/02/14)
    Àññîöèàöèÿ Ýêñïåðèìåíòàëüíîé Àâèàöèè - PJ-II
    Of cause it's in Russian, but you can see the photos. And if you have a questions, please fill free o ask.

    I'm sorry, but I don't have much time to translate everything. P2280751 (Large).jpg P2280752 (Large).jpg P2280755 (Large).jpg P2280753 (Large).jpg
     
    henryk likes this.
  11. Mar 7, 2014 #171

    Jay Kempf

    Jay Kempf

    Jay Kempf

    Well-Known Member Lifetime Supporter

    Joined:
    Apr 13, 2009
    Messages:
    3,741
    Likes Received:
    1,001
    Location:
    Warren, VT USA
    Seems a wise decision to fix the gear until you can get the basics sorted. What weight is the entire aircraft coming out to?
     
  12. Mar 7, 2014 #172

    Malish

    Malish

    Malish

    Well-Known Member

    Joined:
    Oct 11, 2013
    Messages:
    480
    Likes Received:
    786
    Location:
    Russia. City of Volgograd
    We didn't do weigh and balance yet. But it's about 1000kg/2200lb MTOW
     
  13. Mar 8, 2014 #173

    Aircar

    Aircar

    Aircar

    Banned

    Joined:
    Feb 20, 2010
    Messages:
    3,567
    Likes Received:
    367
    Location:
    Melbourne Australia
    Look like the new Super Hornet F 18 intake shapes from the photo -very up to date !
     
  14. Mar 10, 2014 #174

    Malish

    Malish

    Malish

    Well-Known Member

    Joined:
    Oct 11, 2013
    Messages:
    480
    Likes Received:
    786
    Location:
    Russia. City of Volgograd
    Net, We are Russians stupid people F-18 КРАСАВЕЦ A Russian Mig-29 Лутше
     
    pictsidhe likes this.
  15. Mar 10, 2014 #175

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
    =No, BUTY
    Better.
     
  16. Mar 11, 2014 #176

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  17. Mar 16, 2014 #177
  18. Mar 21, 2014 #178

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  19. Mar 23, 2014 #179

    henryk

    henryk

    henryk

    Well-Known Member

    Joined:
    Mar 8, 2010
    Messages:
    4,785
    Likes Received:
    468
    Location:
    krakow,poland
  20. Mar 23, 2014 #180

    berridos

    berridos

    berridos

    Well-Known Member

    Joined:
    Oct 10, 2009
    Messages:
    844
    Likes Received:
    75
    Location:
    madrid

Share This Page



arrow_white