Members Phait Posted August 4, 2009 Members Share Posted August 4, 2009 http://www.flightsimaviation.com/quiz-fsav_takeoff.html I took a 10 question aviation quiz (as I'm an aviation buff), but I only scored 5. This question is interesting, and I was half surprised I got it right. "When temperature increases, what happens to required runway length?" a) shorter runway b) longer runway c) no difference d) depends on aircraft Spoiler/answer (highlight) the answer is B. I figured it as follows: since warm/hot air is less dense, it rises. The more air beneath a plane's wings, the more lift is generated. So if the air is less dense, it would require the plane to gain speed a bit longer - thus require a longer runway. Link to comment Share on other sites More sharing options...
Members rasputin1963 Posted August 4, 2009 Members Share Posted August 4, 2009 I only scored a 4. Really bad! Link to comment Share on other sites More sharing options...
Members Phait Posted August 4, 2009 Author Members Share Posted August 4, 2009 I really meant the question in the topic, but posted the quiz for context. Link to comment Share on other sites More sharing options...
Members kurdy Posted August 4, 2009 Members Share Posted August 4, 2009 I've always heard that objects expand in heat, so I'm guessing "b"? Link to comment Share on other sites More sharing options...
Members Phait Posted August 4, 2009 Author Members Share Posted August 4, 2009 Well I can tell you the length of the runway physically is of no importance, the key word is required length. It won't grow/shrink significantly. Link to comment Share on other sites More sharing options...
Members Jon Chappell Posted August 4, 2009 Members Share Posted August 4, 2009 I'm guessing d, because cooler air is denser, which would increase lift. Warmer air, being less dense would require greater speed to achieve equivalent lift. If I believe b, then that automatically rules out a and c. And this property would be true of all aircraft, so it wouldn't matter what the aircraft is (ruling out d). I don't fly full-size aircraft, but I fly R/C model aircraft, and there's a tangible difference to the way aircrafts perform in different conditions. IC engines run better in colder air, because the air is denser. We often have to richen the mixer on colder days, as the air has more oxygen than on warmer days. Link to comment Share on other sites More sharing options...
Members blue2blue Posted August 4, 2009 Members Share Posted August 4, 2009 I got that one right (BTW, where's the spoiler [highlighted] answer? [EDIT: ah, now that it's in the quote box, I see. White letters. Got it. It was actually faintly visible in the original but I didn't notice it.]) I knew that one because I used to work as a typist in a private detective's office (back when I was taking recording classes) that specialized in stolen aircraft recovery and accident investigation. One of the helicopter accidents I typed up involved an overloaded firefighter chopper in the mountains on a hot day. (The other helicopter accident I recall vividly you do not want to hear about if you ever ride in helicopters. Particularly those sightseeing rides.) The rest was mostly relatively lucky guesses. I failed with 6 right. Too much jargon... I might have known a little of that stuff a quarter century ago but it's pretty well gone today. I knew I should have upgraded from MS Flight Sim 1.1... Link to comment Share on other sites More sharing options...
Members daklander Posted August 4, 2009 Members Share Posted August 4, 2009 IMHO, It'll require the runway to be longer.Higher heat = thinner air = less lift. Link to comment Share on other sites More sharing options...
Members dantedayjob Posted August 4, 2009 Members Share Posted August 4, 2009 I'm guessing d, because cooler air is denser, which would increase lift. Warmer air, being less dense would require greater speed to achieve equivalent lift. If I believe b, then that automatically rules out a and c. And this property would be true of all aircraft, so it wouldn't matter what the aircraft is (ruling out d). Is your name Vizzini? Truly you have a dizzy intellect... Link to comment Share on other sites More sharing options...
Phil O'Keefe Posted August 4, 2009 Share Posted August 4, 2009 I scored an 8 - I misread the crosswind question and answered it West instead of East - or was it East instead of West? I also missed the TO/GA question. Link to comment Share on other sites More sharing options...
Members slight-return Posted August 4, 2009 Members Share Posted August 4, 2009 I went with d) "depends on aircraft" my thinking was -- it mentioned "REQUIRED" and D specified merely "aircraft" (hopticopters, balloons and other VTOL could be included in aircraft) Link to comment Share on other sites More sharing options...
Members daklander Posted August 4, 2009 Members Share Posted August 4, 2009 Link to comment Share on other sites More sharing options...
Members Rudolf von Hagenwil Posted August 4, 2009 Members Share Posted August 4, 2009 did not understand the questions is this a test for educated americans? this multiple choice nonsense i read in the news paper about? Link to comment Share on other sites More sharing options...
Members the stranger Posted August 4, 2009 Members Share Posted August 4, 2009 Cool thread. Link to comment Share on other sites More sharing options...
Members the stranger Posted August 4, 2009 Members Share Posted August 4, 2009 7/10 and I had help with TO/GA from Phil's response and of course, the op question. So, I should not be allowed to fly just yet. And I really wondered for a few minutes which rudder to apply when the right no. 1 failed. Probably too long in a real world scenario. Link to comment Share on other sites More sharing options...
Members cooterbrown Posted August 4, 2009 Members Share Posted August 4, 2009 I got 8/10 ...shoulda been 9 but I brain-farted on the crosswind question and had the runway reversed, in my mind. I did not know the answer to the engine-failure question. Link to comment Share on other sites More sharing options...
Members the stranger Posted August 4, 2009 Members Share Posted August 4, 2009 I got 8/10 ...shoulda been 9 but I brain-farted on the crosswind question and had the runway reversed, in my mind. I did not know the answer to the engine-failure question. Lose engine on right, lose lift on right. Right rudder to compensate. I guessed right. Link to comment Share on other sites More sharing options...
Members Jon Chappell Posted August 4, 2009 Members Share Posted August 4, 2009 Is your name Vizzini? Truly you have a dizzy intellect... Let me put it this way: Have you ever heard of Plato? Aristotle? Socrates? Morons! Link to comment Share on other sites More sharing options...
Members daklander Posted August 5, 2009 Members Share Posted August 5, 2009 Lose engine on right, lose lift on right. Right rudder to compensate. I guessed right. Engine #1 would be on the left. :poke: Link to comment Share on other sites More sharing options...
Members the stranger Posted August 5, 2009 Members Share Posted August 5, 2009 Engine #1 would be on the left. :poke: They called it Right No. 1 in the quiz. Link to comment Share on other sites More sharing options...
Members Mr. Botch Posted August 5, 2009 Members Share Posted August 5, 2009 "Required" runway length is set by the FAA, dependent upon the type of aircraft the runway will be serving. The correct answer is "d". On to the test... Link to comment Share on other sites More sharing options...
Members Mr. Botch Posted August 5, 2009 Members Share Posted August 5, 2009 7/10, lotsa lucky guesses as 2.5 years of Aerospace engineering only helped me on ONE of those questions; they're probably more geared for those with licenses... Link to comment Share on other sites More sharing options...
Members daklander Posted August 5, 2009 Members Share Posted August 5, 2009 They called it Right No. 1 in the quiz. Look at the quiz results I posted. The question is "What to do right away if engine #1 fails on take-off at a speed just over V1?" Link to comment Share on other sites More sharing options...
Members the stranger Posted August 5, 2009 Members Share Posted August 5, 2009 Ah, I see. At least I didn't crash off the end of the runway. Never second guess your intuition. Link to comment Share on other sites More sharing options...
Members enuenu Posted August 5, 2009 Members Share Posted August 5, 2009 Hotter air = less dense air = less air resistance = longer runway required for plane to slow down. Link to comment Share on other sites More sharing options...
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