View Full Version : Another riddle involving planes
SlipStreams_65
23rd Feb 2006, 11:01 AM
Seeing as the other thread with the plane on the conveyor has died away, heres another one I thought up
A Glider with a minimum flight speed ( IE velocity of air over its wings needed to generate enough lift to keep it airborn) of 100 MPH flies into a jetstream moving at exactly 100 MPH, what happens:
A: If the glider flies into the jetstream, against the wind
B: If the glider flies with the wind.
I dont actually know the answer to this one myself.
namu
23rd Feb 2006, 11:14 AM
Having flown gliders in the past, here are my responses to this one:
A: glider suddendly sees its airspeed bump to 200 MPH, is violently shaken (some gliders can't sustain that speed in agitated air), and generally will slow down while rising because of increased drag and lift.
B: glider stalls, alarm goes off, nose pitches down. This happens to light aircraft in weather condition known as "microburst". People generally die from the almost guaranteed crash that comes right after that (since it tends to form near the ground, and catches planes after takeoff or just before landing).
shadow_dragon
23rd Feb 2006, 11:24 AM
Not so much a riddle as a question my friend! ;)
Zarkazm
23rd Feb 2006, 02:09 PM
+1, my dear Watson! :D
Turret 49
23rd Feb 2006, 04:59 PM
Seeing as the other thread with the plane on the conveyor has died away
No it hasn't.
pwnghetti & leetballs
23rd Feb 2006, 05:30 PM
Having flown gliders in the past, here are my responses to this one:
A: glider suddendly sees its airspeed bump to 200 MPH, is violently shaken (some gliders can't sustain that speed in agitated air), and generally will slow down while rising because of increased drag and lift.
B: glider stalls, alarm goes off, nose pitches down. This happens to light aircraft in weather condition known as "microburst". People generally die from the almost guaranteed crash that comes right after that (since it tends to form near the ground, and catches planes after takeoff or just before landing).
Do you have A and B backwards? I would think that flying against the wind would slow you down, not speed you up. :con:
Kaithofis
23rd Feb 2006, 10:42 PM
A: If the glider flies into the jetstream, against the wind
A: glider suddendly sees its airspeed bump to 200 MPH, is violently shaken (some gliders can't sustain that speed in agitated air), and generally will slow down while rising because of increased drag and lift.
That's exactly what he said ;)
DesolationUSA
24th Feb 2006, 12:32 AM
Having flown gliders in the past, here are my responses to this one:
A: glider suddendly sees its airspeed bump to 200 MPH, is violently shaken (some gliders can't sustain that speed in agitated air), and generally will slow down while rising because of increased drag and lift.
B: glider stalls, alarm goes off, nose pitches down. This happens to light aircraft in weather condition known as "microburst". People generally die from the almost guaranteed crash that comes right after that (since it tends to form near the ground, and catches planes after takeoff or just before landing).
^ good thing I read your post, my fathers a small aircraft pilot. I was gonna post the same thing. Lol, thanks for saving me the time.
Do you have A and B backwards? I would think that flying against the wind would slow you down, not speed you up. :con:
Well, considering that would technically give it lift, it could give it speed. But that would be almost a 'perfect storm' scenerio
namu
24th Feb 2006, 02:25 AM
Tha airspeed suddendly goes up, not the speed of the glider relative to the ground ;)
pwnghetti & leetballs
24th Feb 2006, 08:14 AM
Ahh, I see now, my bad.
Zxanphorian
24th Feb 2006, 04:39 PM
For B the airspeed would be 0 :B
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