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  1. gyronaut

    Writing program need recent info about propellers

    lensart, Have a look at the University of Sydney Aeronautical engineering site. They have some good information about blade element theory. Which I think is probably accurate enough for your calculations. There is also a couple of simple programs that use it there. the link is...
  2. gyronaut

    Coanda effect

    The problem with a large swiveling aerofoil is mainly a structural one as to mount it, like a canterlevered beam and make it swivel with out to much friction is difficult. A fixed aerofoil with a flap/aileron type control surface has potential. Another consideration is the effect of a cross...
  3. gyronaut

    synthetic fuel

    The above reply's are much enlightening. My thinking was more in the way of providing fuel for transportation. In particular aircraft as they require a high power to wieght ratio. I was considering it as a way to store energy (chemically) and I thought that making a hyrocarbon could be a good...
  4. gyronaut

    Coanda effect

    This helicopter is going to be small too. Single seat. To provide yaw control there will be a nozzle to direct air in the required direction. What I was wondering is if it would be more efficient to direct the airflow at right angle to the tail boom at the end or to use the airflow, exiting...
  5. gyronaut

    synthetic fuel

    As I am an aeronautical engineer I don't know much about chemistry but I wonder if it is possible to synthetically make a hydrocarbon fuel using electricity. i.e split water and carbon dioxide and combine the hydrogen and carbon. Just want to settle a idea that I have wondered about for a long...
  6. gyronaut

    Duct losses

    I am trying to estimate the losses in a short duct(theory stage at the moment) from which the air used to generate thrust. There will be two 90 degree corners one whith vanes. So far I have used the pipe flow method with the moody diagram and the loss coefficients for bends and change in...
  7. gyronaut

    Coanda effect

    I am involved designing a helicopter of the notar type and I would like to know more about the effectiveness of using the Coanda effect to counteract rotor torque. I have looked at how Mcdonald Douglas use the Coanda effect and it seems to be rather complex component wise. Would the Coanda...

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