Members Guttermouth Posted September 17, 2009 Members Share Posted September 17, 2009 Anyone ever taken a physics class? Anyone think they might be able to help? This equation keeps fucking with me. The answers they give me are dead wrong. Here it is: "Question - What is the average air speed of a swallow?" "answer - Airspeed can be predicted using a published formula. By inverting this midpoint Strouhal ratio of 0.3 (fA/U ? 0.3), Graham K. Taylor et al. show that as a rule of thumb, the speed of a flying animal is roughly 3 times frequency times amplitude (U ? 3fA).5 We now need only plug in the numbers: U ? 3fA f ? 15 (beats per second) A ? 0.22 (meters per beat) U ? 3*15*0.22 ? 9.9 the airspeed velocity of an unladen European Swallow is 10 meters per second Shit is starting to piss me off. I feel dumb. Link to comment Share on other sites More sharing options...
Members Guttermouth Posted September 17, 2009 Author Members Share Posted September 17, 2009 Btw, welcome back optimus Link to comment Share on other sites More sharing options...
Members s4001 Posted September 17, 2009 Members Share Posted September 17, 2009 An African Swallow or a European Swallow? Link to comment Share on other sites More sharing options...
Members Guttermouth Posted September 17, 2009 Author Members Share Posted September 17, 2009 An African Swallow or a European Swallow? i'm not sure.i've found these two coconuts and have tried to figure out how they got here. i would think it would have to be an african swallow to carry the coconuts but, then of course african swallows aren't migratory.... Link to comment Share on other sites More sharing options...
Members Jazz Ad Posted September 17, 2009 Members Share Posted September 17, 2009 Easy problem.The European swallows traded coconuts to the African swallows for jewelry. Then they migrated. You ovbiously have European swallows here.No need to thank me. Link to comment Share on other sites More sharing options...
Members Xuf Posted September 17, 2009 Members Share Posted September 17, 2009 A 5 ounce bird could not carry a one pound coconut. Link to comment Share on other sites More sharing options...
Members whiteop Posted September 17, 2009 Members Share Posted September 17, 2009 Anyone ever taken a physics class? Anyone think they might be able to help? This equation keeps fucking with me. The answers they give me are dead wrong. Here it is: "Question - What is the average air speed of a swallow?" "answer - Airspeed can be predicted using a published formula. By inverting this midpoint Strouhal ratio of 0.3 (fA/U ? 0.3), Graham K. Taylor et al. show that as a rule of thumb, the speed of a flying animal is roughly 3 times frequency times amplitude (U ? 3fA).5 We now need only plug in the numbers: U ? 3fA f ? 15 (beats per second) A ? 0.22 (meters per beat) U ? 3*15*0.22 ? 9.9 the airspeed velocity of an unladen European Swallow is 10 meters per second Shit is starting to piss me off. I feel dumb. You're forgetting drag co-efficient and other atmospheric factors... Link to comment Share on other sites More sharing options...
Members Darkstorm Posted September 17, 2009 Members Share Posted September 17, 2009 Asks the dreaded bunny of doom to eat to swallow so none have to cope with the airspeed physics any more. Link to comment Share on other sites More sharing options...
Members absintheXIII Posted September 17, 2009 Members Share Posted September 17, 2009 *Brain melts* Link to comment Share on other sites More sharing options...
Members BeeTL Posted September 18, 2009 Members Share Posted September 18, 2009 It's a simple question of weight ratios...a five ounce bird could not carry a one pound coconut. Link to comment Share on other sites More sharing options...
Members P1gg1e Posted September 18, 2009 Members Share Posted September 18, 2009 41 Link to comment Share on other sites More sharing options...
Members RIC N BACKER Posted September 18, 2009 Members Share Posted September 18, 2009 Although a definitive answer would of course require further measurements, published species-wide averages of wing length and body mass, initial Strouhal estimates based on those averages and cross-species comparisons, the Lund wind tunnel study of birds flying at a range of speeds, and revised Strouhal numbers based on that study all lead me to estimate that the average cruising airspeed velocity of an unladen European Swallow is roughly 11 meters per second, or 24 miles an hour Link to comment Share on other sites More sharing options...
Members RIC N BACKER Posted September 18, 2009 Members Share Posted September 18, 2009 http://www.youtube.com/watch?v=y2R3FvS4xr4 Link to comment Share on other sites More sharing options...
Members mrs. bleepo Posted September 18, 2009 Members Share Posted September 18, 2009 i have found my people *swoons* it is merely a flesh wound... [YOUTUBE]zKhEw7nD9C4[/YOUTUBE] Link to comment Share on other sites More sharing options...
Members s4001 Posted September 18, 2009 Members Share Posted September 18, 2009 Easy problem.The European swallows traded coconuts to the African swallows for jewelry. Then they migrated. You ovbiously have European swallows here.No need to thank me. An 'I don't know' would have worked. AAAAAAAAAHHHHHH!!!!!!!!!! Link to comment Share on other sites More sharing options...
Members Davo17 Posted September 18, 2009 Members Share Posted September 18, 2009 Whats the birds Ballistic coefficient? Link to comment Share on other sites More sharing options...
Members Hearafter Posted September 18, 2009 Members Share Posted September 18, 2009 An 'I don't know' would have worked. Mr. Hand: Food will be eaten on YOUR time. Why are you continuously late for this class, Mr. Spicoli? Why do you shamelessly waste my time like this? Jeff Spicoli: [long pause, but then with complete truth in his answer] I don't know. Mr. Hand: [Mr. Hand goes to blackboard and writes the words 'I Don't Know', then underlines them] [reciting] Mr. Hand: I like that. 'I Don't Know.' That's nice. [imitating] Mr. Hand: 'Mr. Hand, will I pass this class?' Gee, Mr. Spicoli, I don't know! You know what I'm going to do? I'm going to leave your words right up here for all my classes to enjoy, giving you full credit of course, Mr. Spicoli.Jeff Spicoli: All right! Link to comment Share on other sites More sharing options...
Members FebruaryStars Posted September 18, 2009 Members Share Posted September 18, 2009 Reads thread title... fires up the dvd player and opens a beer... Link to comment Share on other sites More sharing options...
Members zachoff Posted September 18, 2009 Members Share Posted September 18, 2009 The swallow is the bird of Link to comment Share on other sites More sharing options...
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