5 thoughts on “News

  1. Dear Claes Johnson,
    Warmest congratulations on having your New Theory of Flight published!
    Not just BRILLIANT physics – but brilliant determination and persistence in order to get treated fairly in this horribly corrupt world we live in!

    I’m not a fluid dynamicist, so I’m delighted that your theory is visualisable qualitatively as a system of streaming counter-rotating vortices that are shed along the trailing edge of a wing or sail – if I’m not mistaken.
    (This reminds me of “Couette flow” and related fluid phenomena involving systems of counter-rotating vortices which change with speed . . )

    As hobbies, I’m very interested in sailing, para-gliding and bird-flight – i.e. low Reynolds number flying. If I understand right, the streaming counter-rotating vortices tighten up as the air speed rises – ie get narrower and increase in number?
    So I wanted to ask, approximately what diameter are the streaming vortices behind a bird-wing? A few centimetres? Or millimetres? Of course large birds and small birds are an order of magnitude different, but I’m trying to visualise this transparent phenomenon.

    With best wishes for your coming recognition 🙂

    Patrick Collins

    • Thanks Patrick for these words! The diameter of the streamwise vortices may be of the size of the radius of the trailing edge, which could be comparable to the thicknees of the wing and with increasing speed they get longer but not much thinner.

      Best regards, Claes

  2. Hello!
    First of all I would like to give you my highest respect for your studies. I only barely understand them, as I am only a pilot and flight instructor. But for a long time now, I was always unsatisfied with the answers about how lift is being produced. How to explain lift to my flight students and not teaching something wrong. Are you familiar with the work of Dr Wolfgang Send in Göttingen? (, is his website)
    He helped me to understand the matter a bit more.
    Would you agree that the origin of lift is because more air is flowing over the top of the wing than underneath!? As the separation point of the airflow moves forward and down from the leading edge at a positive angle of attack, more volume of air is now routed above the wing. Thus, the air is being accelerated and you get this tube-effect described by Bernoulli resulting in low pressure above the wing and high pressure below.
    Would you be able to give me a descriptional explanation of your theory, which I could use for myself and for my flight students, as I am not able to describe it mathematically?
    If you have the time, I would be very happy to hear from you?
    Kind regards and many greetings from Cologne
    Oliver Haas

  3. Hi Oliver: I would rather say that the major part of lift comes from incoming flow being redirected downwards by the action of the wing as the flow satisfying a slip boundary glides along the upper surface of the wing until separation at the trailing edge. This is explained in detail in the New Theory.

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