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  1. WINGITIS

    BF-109 Aerofoil Question

    I think Willy did a fair bit of testing to prove what he was doing was correct! See these full sized wind tunnel test pics... Germany supposedly even had a transonic wind tunnel facility, easy when you know how, but who else had one in WW2!
  2. WINGITIS

    Coordinates for NACA 23112

    Since that thread originated Airfoiltools has added the Reflex generator for NACA 5 Series airfoils, including the 23112..
  3. WINGITIS

    BEACHDRAGON, a fun project. Low aspect ratio-BSLD-ridge soaring.

    Yes, I put it in there because it shows the airfoils used...
  4. WINGITIS

    BEACHDRAGON, a fun project. Low aspect ratio-BSLD-ridge soaring.

    http://www.laboratoridenvol.com/projects/gnuReflex/gnuReflex.en.html
  5. WINGITIS

    Passive Variable Pitch Propeller

    Some more information on the ARGUS option below...(ALSO MY ICON ON THE LEFT) Including this startup video that shows it in operation.
  6. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    Hi Erkki There are multiple different WINGITIS FW airfoils in that Polar's image, some are a couple of years old some are newer, back in the thread in late 2020 you also asked, a few times, to see them. They are proprietary and commercially sensitive...so will not be shown here. Out of that...
  7. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    Yes with the addition, "CLmax determines wing size" for your chosen stall speed.
  8. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    Yes very hard, but its achieved already, see my examples in #287 That is Mr Wainfan's diagram in #294, illustrating HIS view of the variations possible.......;)
  9. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    As a further clarification shown by this diagram from Mr Wainfans "AIRFOIL SELECTION" book, one can achieve the various CL at Zero AOA by these characteristic changes as perhaps a crude alternative to possessing my AI engine:
  10. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    It depends if you think an AI engine is a machine! Typically an ArtificiaI Intelligence engine is a collection of software modules that form a rather sophisticated expert system, that after some training/learning can sort of design outcomes/solutions itself, based on strict paramater's input to...
  11. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    That is what a sophisticated AI engine can achieve! It will go higher on the CL, to 2.45 but then other parameters drop to be less than ideal.
  12. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    For everyone's information here are a selection of VERY GOOD Reflex airfoils designed by WINGITIS.... They are optimized for different RN and size of aircraft, but are shown here at two representative RN of a small flying wing aircraft They have a "selected" CL at zero AOA... So one can...
  13. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    You need to look at the RN spreadsheets already presented here, WE ALL KNOW ITS CHORD AND AIRSPEED AND DENSITY... BUT a LOWER AR has a longer chord to get the same area to lift the aircraft. The longer chord operates in the higher RN...
  14. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    For a small aircraft, it is totally relevant. I was being rigorous by allowing the person asking the question to see what the representative difference was on that small aircraft platform. Allowing the user to choose what airfoil suits the AR and that they can CHOOSE the CL at zero AOA, its...
  15. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    The AR also affects the airfoil in terms of the Reynolds Number it operates at... You can choose an airfoil, that suits the higher RN of a low AR wing, that has whatever CL you need at zero AOA, IE move the curve of the AOA versus CL horizontally along the AOA axis, within reason, for a plank...
  16. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    My airfoils are not laminar, but the turbulent layer is always as thin as possible, the laminar to non laminar results are within a 1-2 percent. The Synthetic Deposition AI engine that creates the airfoils works to a tolerance of 0.5mm on a 50" chord, but we cannot home build to anywhere near...
  17. WINGITIS

    ACHIEVING THE BEST REFLEXED AIRFOILS FOR FLYING WING USE IN THE SMALL PLANE CATEGORIES

    That's a great video, I have downloaded it for future reference. I would prefer the B-29 flush rivets but that is not going to happen on mine.... Here are some images from the repair manual of the Victor that has the tolerances and thicknesses.
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