Question:

Why was my Answer deemed a violation, the following is email?

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Hello Cherokeeflyer_redux (cherokeeflyer_redux)

You have posted content to Yahoo! Answers in violation of our Community Guidelines or Terms of Service. As a result, your content has been deleted. Community Guidelines help to keep Yahoo! Answers a safe and useful community, so we appreciate your consideration of its rules.

Question: How do airplanes fly upside down? Where does the lift come from?

Question Details: Surely the angle of the wings would send it straight down.

Deleted Answer: say it together class.....ANGLE OF ATTACK.... "You’ve probably been told that an airfoil produces lift because it is curved on top and flat on the bottom. But you shouldn’t believe it, not even for an instant. Presumably you are aware that airshow pilots routinely fly for extended periods of time upside down. Doesn’t that make you suspicious that there might be something wrong with the story about curved on top and flat on the bottom? Here is a list of things you need in an airplane intended for upside-down flight: * You need super-duper seatbelts to keep the pilot from flopping around. * You need to make sure the airframe is strong enough to withstand extra stress, including stress in new directions. * You need to make sure that the fuel, engine oil, and battery acid stay where they are supposed to be. You will notice that changing the cross-sectional shape of the wing is not on this list. Any ordinary wing flies just fine inverted. Even a wing that is flat on one side and curved on the other flies just fine inverted, . It may look a bit peculiar, but it works. The misconception that wings must be curved on top and flat on the bottom is commonly associated with the previously-discussed misconception that the air is required to pass above and below the wing in equal amounts of time. In fact, an upside-down wing produces lift by exactly the same principle as a rightside-up wing. At small angles of attack, a symmetric airfoil works better than a highly cambered airfoil. Conversely, at high angles of attack, a cambered airfoil works better than the corresponding symmetric airfoil. At any normal angle of attack (up to about 12 degrees), the two airfoils produce virtually identical amounts of lift. Beyond that point the cambered airfoil has a big advantage because it does not stall until a much higher relative angle of attack. As a consequence, its maximum coefficient of lift is much greater. At high angles of attack, the leading edge of a cambered wing will slice into the wind at less of an angle compared to the corresponding symmetric wing. This doesn’t prove anything, but it provides an intuitive feeling for why the cambered wing has more resistance to stalling. On some airplanes, the airfoils have no camber at all, and on most of the rest the camber is barely perceptible (maybe 1 or 2 percent). One reason wings are not more cambered is that any increase would require the bottom surface to be concave — which would be a pain to manufacture. A more profound reason is that large camber is only really beneficial near the stall, and it suffices to create lots of camber by extending the flaps when needed, i.e. for takeoff and landing. Reverse camber is clearly a bad idea (since it causes earlier stall) so aircraft that are expected to perform well upside down (e.g. Pitts or Decathlon) have symmetric (zero-camber) airfoils. under ordinary conditions, the amount of lift produced by a wing depends on the ANGLE OF ATTACK, but hardly depends at all on the amount of camber. This makes sense. In fact, the airplane would be unflyable if the coefficient of lift were determined solely by the shape of the wing. Since the amount of camber doesn’t often change in flight, there would be no way to change the coefficient of lift. The airplane could only support its weight at one special airspeed, and would be unstable and uncontrollable. In reality, the pilot (and the trim system) continually regulate the amount of lift by regulating the all-important ANGLE OF ATTACK"

Violation Reason:Not a Question or Answer

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18 ANSWERS


  1. That is a harmless question... I don't see why it was deleted..


  2. What you must understand is that many of the questions posted in the "Aircraft:" sub-category are coming from young kids,  IE: "I wanna be a pilot", "How do I do (fill in the blank) on Flight Simulator", "How old do I have to be to fly a plane",etc.

    Since they are very immature, they are also emotional. Your statement,  "Say it together class" hurt their feelings so they filed a violation notice on you. It had nothing to do with your answer, which was correct. You answered a question for a "baby" and they responded like a "baby". Don't let it bother you, and don't waste your time responding to the violation to Yahoo. They don't care either.

    I quickly learned this after receiving a few violation notices myself. After doing a little homework I discovered that all of the violations were coming from very young girls who simply didn't like my answer.  Before I answer any questions now I look at the posters previous questions, and if I get any evidence that the question is from a child or early teen, I don't respond. As I said, don't let it bother you, it's just part of the game.

  3. maybe its because you go on and on recovering the same, on and on recovering the same comments.

    Yes, partially.  Angle of attach does control the amount of lift available from a given airfoil. period.

    Symmetrical airfoils are used in aerobatics just for that reason...

    my suggestion is you move on to more meaningful issues and stop worring about what the internet thinks of you.

  4. It sounds like a somewhat extraeneous, but very viable and informative answer by someone who is savvy when it comes to aeronautics. Does not seem to be mean, nasty, hateful, derogatory, racist, sexist, ethnic in it's makeup. What it is a very well thought out answer.

  5. I thought the answer was a clear, cognizant answer to a question, there is nothing in it objectionable, a little long, but those are the type of answers I WANT TO GET. A lot of the information you sent out was an excellent source for future reference, plus it could cut down on the amount of "the same question" asked over and over.

    Your answer was great

  6. It was deleted because you did not bash Bush.

  7. I would follow the advice of Peedlepup. The children that have at times dominated this forum get upset for whatever reason and fire off to the Customer Care folks as their only "payback" for you being "mean" to them. Don't let it get to you. I have almost completely stopped answering questions because of some responses and thumbs down for no good reason to my answers.

  8. The all capital letters in "ANGLE OF ATTACK"...must have sounded vicious to a non flyer.  

    The content was good, accurate and well stated. I thought it was obviously the best answer, and I enjoy reading your other answers as well.  Hang in there!

  9. The answer may be a bit long winded, but it still looks like an answer to me. It sure doesn't look like a violation.

  10. It just happens from time to time.  There are people who will report you precisely because your answer is correct and well-written.  Yahoo should check all such reports, but they don't always.

    Don't worry.  It won't do you any real harm.

  11. F 'em and feed 'em fish heads!

    Again, Welcome back Cherokeeflyer!

  12. Because of the 1st sentence in your answer. Someone didn't like being talked down upon. I've had similar rejects from Yahoo. I think nothing of them. I just look at it as the ignorant people out there just don't get it. That is why I have a degree in science & they do not. My degree is in anatomy so I can't comment on your answer, but I just thought you should know.

  13. I feel your pain.  I got the same nasty-gram for one of my smart-alecky responses to yet another of Stuttgart's asinine questions.  I got it deleted and was penalized some points :/

    But yeah, I don't see any problem with your answer.  It actually seems to do a pretty good job of explaining angle of attack.  Apparently the Yahoo moderator that read it was not well-versed in aerodynamics.

  14. Unfortunately there are a number of people here who suffer intelligence envy, and it takes very little to set the sad things off. In addition, the professionalism of the moderators can be called into question given that you get a stock answer for the deletion and no reasonable feedback when challenged...

  15. I actually READ all of your answer when it was posted and its pretty indepth. You were very correct. I recalled being in ground school and having to battle with the concept of "Angle of Attack".

    Challenge the deletion. There is no violation there!

    (I seriously think Y!A needs a justice system!)

  16. Someone may have hit "Report it" by mistake and did not know how to get out of it. I don't see anything offensive about it.

    Don't worry about it.

  17. I think some people probably put silly questions up to get people to say something silly, and then they report them.  It seems like someone is asking the same question almost every day.  I cant' believe they don't see the other similar questions that come up when they first type it in.  So, they are probably trying to bait someone so they can turn them in and that makes them happy somehow.  Don't worry about it.  Your answer sounded really good.

  18. It is way too long. And I say that as both a flight instructor and as an attorney. My answer to the same question was :"Angle of attack. Forward stick." Sometimes, less is more.

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