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HomeOff Topics › Airplane in a wind tunnel
02-04-2008 03:11 PM  10 years agoPost 81
SSN Pru

rrElite Veteran

Taxachusetts

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1stplace did infact offer a wager but only in a PM to me. It appears he's scared of you, Spork, and Gimbalfan. Not scared of me though

1stplaces PM to me.
Hi umdpru
Quote

I'll bet money that you thought it wouldn't take off there too...

How much money there buddy? I'll put up $10,000.00, my X-cell Stratus and my race prepped Ford Lightning against whatever ya got!

Stupidity can be cured. Ignorance is for life!

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02-04-2008 03:13 PM  10 years agoPost 82
SSN Pru

rrElite Veteran

Taxachusetts

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OMG : Did you lot ever do physics at school ?
Yep, several here too including more advanced physics involved with getting a BSME.

Have you ever taken a physics class?

More importantly, before answering that question, do you believe an aircraft is capable of taking off given the wording of the original airplane in a wind tunnel riddle?

Stupidity can be cured. Ignorance is for life!

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02-04-2008 04:05 PM  10 years agoPost 83
1stPlace

rrApprentice

Ohio USA

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He placed his bet. The only one not willing to step up to a bet seems to be you.
Wrong! this was umpdrus original bet:
I'm gonna go research the treadmill thread. I'll bet money that you thought it wouldn't take off there too...
I am willing to put up $10K in cash and $40K in assets on his bet.

I never said the plane wouldn't fly in that question. I have already won, and now he is back peddling.
Why haven't you accepted GimbalFan's bet?
Because it would be very foolish to place a bet on a question that throws real world physics out the window and only deals with semantics and theory. An "Infinitely large wind tunnel" is a physical impossibility, as are infinite ground speeds and infinite wind speeds.
It appears he's scared of you, Spork, and Gimbalfan. Not scared of me though
Scared? No... Wise? yes....

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02-04-2008 04:24 PM  10 years agoPost 84
SSN Pru

rrElite Veteran

Taxachusetts

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I never said the plane wouldn't fly in that question. I have already won, and now he is back peddling.
You've quoted me so you know that I said "I'll bet money" I never said I'll bet 10k or 40k in assets as I don't have that to gamble with. I do however, have $.25 and a tank full of 100% castor FAI fuel to gamble with.

It's all a moot point because there is no way for me to prove or for you to disprove anything in that other thread.

Anyways, back to the topic at hand.
Wise? yes....
Funny that you put a "" after your remark about being wise because it most certainly is very laughable, especially after your claims on this here thread...

Stupidity can be cured. Ignorance is for life!

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02-04-2008 04:37 PM  10 years agoPost 85
1stPlace

rrApprentice

Ohio USA

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It's all a moot point because there is no way for me to prove or for you to disprove anything in that other thread.
I certainly could prove that I never claimed that the plane wouldn't fly. All of my posts are still there. You could go back and find them all too. But, you won't because you're too lazy.

Would you like my address, so you can send me my tank full of FAI fuel and my $.25?
Funny that you put a "" after your remark about being wise because it most certainly is very laughable, especially after your claims on this here thread.
And I am still laughing at you

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02-04-2008 05:00 PM  10 years agoPost 86
scatbass

rrNovice

Hiram, GA

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Considering the wording of the original riddle and the involvement of an INFINITELY sized wind tunnel...isn't making a bet sorta a moot point, since it could never be proven?



Mike

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02-04-2008 05:58 PM  10 years agoPost 87
SSN Pru

rrElite Veteran

Taxachusetts

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certainly could prove that I never claimed that the plane wouldn't fly. All of my posts are still there. You could go back and find them all too. But, you won't because you're too lazy.
Ah, yes, ofcourse you or I or anyone else could go back and check out your posts but then again, RR doesnt track edits so you would, in the end, have no way of proving you didn't edit your posts and I would have no way of proving otherwise as well.

Ofcourse, I am not accusing you of anything here either.

Yea, send me your address, I'll give you a tracking number when I ship it

Stupidity can be cured. Ignorance is for life!

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02-04-2008 07:38 PM  10 years agoPost 88
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Why haven't you accepted GimbalFan's bet?
Because it would be very foolish to place a bet on a question that throws real world physics out the window and only deals with semantics and theory. An "Infinitely large wind tunnel" is a physical impossibility, as are infinite ground speeds and infinite wind speeds.
isn't making a bet sorta a moot point, since it could never be proven?
An aeronautical engineer with nothing at stake but his reputation, whose qualifications are satisfactory to the bettors, could be chosen to render a decision that all would agree in advance to abide by.

Good enough for you, 1st?

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 07:44 PM  10 years agoPost 89
SSN Pru

rrElite Veteran

Taxachusetts

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Good enough for you, 1st?
Likely a no...

Stupidity can be cured. Ignorance is for life!

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02-04-2008 09:08 PM  10 years agoPost 90
1stPlace

rrApprentice

Ohio USA

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Good enough for you, 1st?
No, and here's why. Forward speed is too indefinitive. If is defined as the airplanes airspeed, than I am 100% certain of my position, and I may take the bet.

If forward speed is defined as ground speed, or speed relative to a fixed point, than I have doubts that the engineer may agree with my conclusion. I am not going to gamble on anyones opinion of a theory. I would gamble on the results of an experiment which would prove whether the plane would take off or not.

Since this experiment is unlikely, I will not take the bet at this time. If someone decides to do the experiment, I will certainly place my bet on the outcome.

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02-04-2008 09:15 PM  10 years agoPost 91
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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If an airplane was sitting in a wind tunnel that was infinitely large and the wind generater was designed to match the forward speed of the plane from behind, can the airplane take off?
There's the original question you're unable to understand the wording and/or physics of, so how 'bout if we bet on this modified version of the question?

"During a tailwind condition of 20 mph, a plane with a stall speed of 40 mph attempts to take off before reaching a ground speed of 50 mph."

According to your logic and advanced training, this plane can also take off.

LET'S BET!

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 09:21 PM  10 years agoPost 92
1stPlace

rrApprentice

Ohio USA

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"During a tailwind condition of 20 mph (relative to the ground), a plane with a stall speed of 40 mph attempts to take off before reaching a ground speed of 50 mph."
Not a chance. If the stall speed is 40MPH and the tailwind is 20MPH, the plane will need a ground speed of at least 60MPH to lift off. Sorry, I don't bet on a 100% certain loss.

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02-04-2008 09:23 PM  10 years agoPost 93
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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"During a tailwind condition of 20 mph (relative to the ground), a plane with a stall speed of 40 mph attempts to take off before reaching a ground speed of 50 mph."
Not a chance. If the stall speed is 40MPH and the tailwind is 20MPH, the plane will need a ground speed of at least 60MPH to lift off. Sorry, I don't bet on a 100% certain loss.
Thank you. With that reply you've proven you're linguistically-impaired to the point of being unable to understanding the words and phrasing of the original question. There's no outcome-related difference between the two versions.

Back to school for you!

Since you're unable to understand certain forms of 'plane' english, we wonder how much of your textbook theory in aeronautics could've fully sunk in.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 09:38 PM  10 years agoPost 94
1stPlace

rrApprentice

Ohio USA

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However, if you're incapable of ciphering 'plane' english, one wonders how much of your textbook theory in aeronautics could've really sunk in
Enough to graduate in the top 3% of each of my classes.
Thank you. You've proven that you're linguistically incapable of understanding the original question that was posed.
Says you and one other
There is no outcome-related difference between those two questions.
Says you and one other
Back to school for you. You're written comprehension skills are appalling.
My reading comprehension has always been 97% or better on IQ tests... I won't put any value in your opinion of my skills.

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02-04-2008 09:43 PM  10 years agoPost 95
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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No matter how you've tested in the past, no matter how you respond from this point forward, the fact remains that you've clearly demonstrated your inability to correctly answer the question posed at the beginning of this thread. This shortcoming is apparently due to your sub-standard reading skills.

Although you may be able to change a spark plug and take-off and land a plane, your lack of reading comprehension is still frightening to the more knowledgeable pilots among members here -- and there's far more than two.

Good luck with that!
My reading comprehension has always been 97% or better on IQ tests.
IQ tests don't specifically assign numerical values to reading comprehension!

Bwahahahahahahahaha!!!

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 09:50 PM  10 years agoPost 96
bigdad390

rrVeteran

East. Liverpool, Ohio

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an airplane was sitting in a wind tunnel that was infinitely large and the wind generater was designed to match the forward speed of the plane from behind, can the airplane take off?
Yes.

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02-04-2008 09:52 PM  10 years agoPost 97
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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an airplane was sitting in a wind tunnel that was infinitely large and the wind generater was designed to match the forward speed of the plane from behind, can the airplane take off?
Yes.
Wrong. Wanna bet?

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 10:00 PM  10 years agoPost 98
1stPlace

rrApprentice

Ohio USA

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IQ tests don't specifically assign numerical values to reading comprehension!
Oh my... They do in the categorical break down. But, they probably didn't when you were in school 40 years ago. So, I'll let you slide on that one.
Good luck with that!
Thanks! It has served me very well indeed. As a matter of fact, the FAA even calls on me to help interpret their regulations when they are in a sticky situation, and I have been called on a few times to give my professional opinion of aviation regulation and liabilties in court.

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02-04-2008 10:03 PM  10 years agoPost 99
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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They do in the categorical break down.
Licenses, certs and IQ tests aside, you are STILL wrong about the original question, which STILL places you below where you think you belong in any worthwhile test of aerodynamic knowledge. Congratulations!
anything short of a sledgehammer used here for certain individuals just won't hammer the point home deep enough...
Still applies.

And the offer to bet on your wrong answer to the original question still stands.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-04-2008 10:08 PM  10 years agoPost 100
bagobitz

rrVeteran

saddleworth,lancs,UK

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If the tail-wind is exactly the same as the forward speed of the plane. the plane is sitting in still air.....say the forward speed is 100mph, the tail-wind is ALSO 100 mph....the plane and the air are BOTH going in the same direction at.......100 mph...the plane is in STILL AIR CONDITIONS....ground-speed is NOT relevant....an unpowered, stationary plane will take off if a headwind component equals or exceeds it's stall-speed.

THAT is the true reason that light-aircraft are TIED DOWN when they're parked outside - and NOT to stop someone running off with them

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