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  1. H

    Difference between positive and negative camber airfoils.

    If I wanted to explain to a ten year old the difference between chord and camber, without making a soup out of the terminology, what would I tell her? Somehow the two concepts seem too closely linked, at least in my mind.
  2. H

    Difference between positive and negative camber airfoils.

    "A wing with a high aspect ratio, like that of the U-2, would work with positive or negative chord, but the positively chorded wing would generate more lift at any given AOA compared to a negative chord wing, all else being same." Is the above statement correct?
  3. H

    Difference between positive and negative camber airfoils.

    We had a lot of problems over here with our MiG-21s, due to the quirks of the tailed Delta, ambient temperatures over most of India are usually in the 40-45 degree range (Celsius), so the wing is already producing about 10% less lift than normal, couple that with young pilots just transitioning...
  4. H

    Book Discussion.

    You are destroying a lot of illusions. But as Carl Sagan said about Johannes Kepler.... "He preferred the truth to his dearest illusions."
  5. H

    Book Discussion.

    What would have been the "threshold of affordability" for an army surplus plane in those days? Something on the lines of a Cub or a "Ragwing" artillery spotter? Things must be far, far worse now, with gas prices being the way they are.
  6. H

    Book Discussion.

    What is a fat ultralight? Something that has a Rogallo wing?
  7. H

    Difference between positive and negative camber airfoils.

    Google image search has disappointeded me for the last time. That is a terrible image, even I am not that ignorant! my bad :cry: Will show greater care in future. Here's another question: One of the posters has stated that negative camber airfoils are used in the tail. My understanding is that...
  8. H

    Difference between positive and negative camber airfoils.

    I have come to the realization that the explanations for how airfoils work given in most high school level books are somewhere between "useless" and "maliciously misleading". I have been going through a few books which talk about circulation and down wash and vortex shedding and am only now...
  9. H

    Book Discussion.

    I would be the happiest person who ever lived if I had been born in the US in the thirties, I would have come of age in the fifties, a time when the United States was coming up with a new fighter design every six months, and the surplus of planes from world war two made flying possible for the...
  10. H

    Book Discussion.

    Well worth it!! Its one of those books people pass on to their grandchildren (if they are aerophiles).
  11. H

    Book Discussion.

    Things are very straightforward in your country when it comes to acquiring components you might need to build, well .......just about anything really. I will have to do the urban middle class's equivalent of the Manhattan Project to hunt down everything I need, so my glider will be flying only...
  12. H

    Book Discussion.

    Really, Any Idea which state? Is it Bangalore? (My countrymen call it Bengaluru now, but it will always be Bangalore to me....)
  13. H

    Book Discussion.

    May i ask What kind of project you are pursuing? I am studying a Sandlin air chair design (all I can afford to really)
  14. H

    Book Discussion.

    Thanks everyone!!
  15. H

    Book Discussion.

    Wonderful!! Confirmation of one's beliefs tastes so good in the morning. Just like egg-cheese omelets and cucumber salad. Are there any other flight instruction books that approach the subject in a manner similar to "Stick and Rudder"?
  16. H

    Book Discussion.

    Hi everyone, I am going through a book called "Stick and Rudder" written by a guy who sounds German and whose name I have given up trying to pronounce. Although I cannot uber-emphasize how much I am enjoying reading it I am having trouble swallowing some of the things the author states about...
  17. H

    Hypothetical Glider

    I have seen 'span loading' come up repeatedly in many design studies, the Horten tail-less designs used differential span loading to achieve yaw stability. I haven't really been able to visualize what it means. Norman, could you explain?
  18. H

    Hypothetical Glider

    It might be a useful tool for training future astronauts in high speed landing. Just Kidding... It was a thought experiment. nothing more. I am working on a painfully low tech, conventional design.
  19. H

    Hypothetical Glider

    Something on the lines of this here is the three way view: That is a lot of wing should have a respectable glide characteristics despite its low aspect ratio....
  20. H

    Hypothetical Glider

    Hi everyone! Had a weird little daydream... Flying in a delta winged glider with a really, really big delta wing. Has anyone ever tried building such a craft? Wonder what its flight characteristics would be......:ponder:
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