Brain teaser
02-02-2008, 09:37 PM
#145
Boost Pope
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Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
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So today, I'm playing the Thread Necromancer to say: Myth Busted.
http://www.mininova.org/get/1140955
Also, I Told You So. Neener neener.
http://www.mininova.org/get/1140955
Also, I Told You So. Neener neener.
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02-04-2008, 02:50 AM
#149
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Join Date: Oct 2007
Location: Norrahammar, Sweden
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What I want to know is: If a lowered Civic on 21s are standing on a huge grease slide outside Bojangles: How much JDM does it take before the Lambo-doors makes all the other cars on the street fly away? The grease slide is created by frying oil, baby oil and JDM oil from the civic. The Civic is equipped with 43 speakers, 7 air fresheners, 1 pizza delivery sign, 1 1.8 meter high JDM wing, 4 fake air intakes, 1 unpainted body kit and a has a total weight of 2.1 metric tons.
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02-04-2008, 03:02 AM
#150
What I want to know is: If a lowered Civic on 21s are standing on a huge grease slide outside Bojangles: How much JDM does it take before the Lambo-doors makes all the other cars on the street fly away? The grease slide is created by frying oil, baby oil and JDM oil from the civic. The Civic is equipped with 43 speakers, 7 air fresheners, 1 pizza delivery sign, 1 1.8 meter high JDM wing, 4 fake air intakes, 1 unpainted body kit and a has a total weight of 2.1 metric tons.
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02-04-2008, 04:37 PM
#153
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im too lazy to download that answer but i can say that it will be close to impossible for plate to take off. planes fly because of pressure difference between top and down of the wings. if you look at wing from the side you will see that it has a curve to it. thats to create lower pressure on top and higher pressure on bottom - thats what keeps them from falling
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02-04-2008, 04:52 PM
#155
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damn... its possible 
http://www.youtube.com/watch?v=4owly...eature=related
well... i didnt think about airspeed and groundspeed :/
http://www.youtube.com/watch?v=4owly...eature=related
well... i didnt think about airspeed and groundspeed :/
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12-14-2013, 01:22 PM
#156
Boost Pope
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Location: Chicago. (The less-murder part.)
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So, back in 2006 I posted the following:
It was subsequently pointed out that I was slightly off on the exact numbers, but the fundamental concept remained valid. unfortunately, I had no way to prove this to the non-believers.
Until now:
Lift does not require speed relative to the ground, it requires speed relative to the air. This is why all critical velocities (Vr, Vs, Vfe-x, Vne, etc) are always given in KIAS (knots indicated airspeed).
A Cessna 172, if I remember correctly, will rotate at around 60 KIAS, and experience best climb at about 80 KIAS. So let's say that N6066R is sitting on the ramp, tied down loosely. A hurrinane begins to blow, and the airplane is oriented such that it is facing into the wind. When the wind speed reaches 60 knots, the airplane will rotate. By the time the wind gets up to 80, the airplane will be completely off the ground, doing it's very best to climb against the ropes.
In essence, it will be flying with zero groundspeed.
A Cessna 172, if I remember correctly, will rotate at around 60 KIAS, and experience best climb at about 80 KIAS. So let's say that N6066R is sitting on the ramp, tied down loosely. A hurrinane begins to blow, and the airplane is oriented such that it is facing into the wind. When the wind speed reaches 60 knots, the airplane will rotate. By the time the wind gets up to 80, the airplane will be completely off the ground, doing it's very best to climb against the ropes.
In essence, it will be flying with zero groundspeed.
Until now:
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