Author Topic: Can this airplane lift off? (Read 31125 times)

333 · « **Reply #350 on:** April 09, 2009, 07:55:20 AM »

"Cry Havoc, and let slip the dogs of war"!

Grumpol · « **Reply #351 on:** April 09, 2009, 08:01:38 AM »

Quote from: masonryman on April 08, 2009, 06:05:39 PM

when I brought up practical application verses theory I had never seen that article.

http://blag.xkcd.com/2008/09/09/the-goddamn-airplane-on-the-goddamn-treadmill/comment-page-8/

As a tradesman I look at the practical verse theory, mostly because I have little formal education beyond HS, this is the point I was trying, unsuccessfully, to make

It was fun

peace

I`m at the same level as you in the educational world mate, but looking at this theres definately problems.
But then you brought the "practical verses theory" thing which is something i like.
For example..................
In theory the bumble bee cannot possibly fly, it defies the laws of physics.
But in the practical world they seem to get off the ground fairly well.

Bob Wessner · « **Reply #352 on:** April 09, 2009, 08:35:05 AM »

Quote from: Grumpol on April 09, 2009, 08:01:38 AM

In theory the bumble bee cannot possibly fly, it defies the laws of physics.
But in the practical world they seem to get off the ground fairly well.

And converge on my wife [picture arms flailing].

Grumpol · « **Reply #353 on:** April 09, 2009, 08:50:32 AM »

Hinz · « **Reply #354 on:** April 09, 2009, 08:18:37 PM »

the answer is yes, no ifs, ands or buts.
once the thrust provided by the PROPELLER overpowers the very very very minimal friction on the NON DRIVEN wheels below, the plane with start to move forward and thus the wings will begin to provide lift. i don't know why this has to be soo complicated.

mlinder · « **Reply #355 on:** April 09, 2009, 08:22:55 PM »

Quote from: Hinz on April 09, 2009, 08:18:37 PM

the answer is yes, no ifs, ands or buts.
once the thrust provided by the PROPELLER overpowers the very very very minimal friction on the NON DRIVEN wheels below, the plane with start to move forward and thus the wings will begin to provide lift. i don't know why this has to be soo complicated.

It wasn't, until we started dealing with a conveyor belt that could hit infinite speeds, and whether the bearings were frictionless or not (although, either way, the answer is easy: yes for frictionless, no for non-frictionless.)

seaweb11 · « **Reply #356 on:** April 09, 2009, 08:24:14 PM »

Quote from: Hinz on April 09, 2009, 08:18:37 PM

the answer is yes, no ifs, ands or buts.
once the thrust provided by the PROPELLER overpowers the very very very minimal friction on the NON DRIVEN wheels below, the plane with start to move forward and thus the wings will begin to provide lift. i don't know why this has to be soo complicated.

Now I see said the blind man

333 · « **Reply #357 on:** April 09, 2009, 08:33:26 PM »

As he picked up his hammer, and saw.

bunghole · « **Reply #358 on:** April 09, 2009, 08:46:26 PM »

OK Jokers!!!!!

Back to motorcycles now!!!!

We've been diverted too long. Let's ride.

seaweb11 · « **Reply #359 on:** April 09, 2009, 08:47:42 PM »

Funny how the wording of that post lit the bulb

I'm..........going to get some oil.....................

333 · « **Reply #360 on:** April 09, 2009, 08:49:14 PM »

What kind of oil will you be using?

seaweb11 · « **Reply #361 on:** April 09, 2009, 08:59:54 PM »

sorry, oil thread is down the hall on your left.

bunghole · « **Reply #362 on:** April 09, 2009, 09:09:02 PM »

Quote from: seaweb11 on April 09, 2009, 08:59:54 PM

sorry, oil thread is down the hall on your left.

Don't look back.

Gordon · « **Reply #363 on:** April 10, 2009, 03:15:01 AM »

Really, now. Who are these people that keep adding to the "No" votes? Are they serious?

alltherightpills · « **Reply #364 on:** April 10, 2009, 09:28:22 AM »

Quote from: seaweb11 on April 09, 2009, 08:59:54 PM

sorry, oil thread is down the hall on your left.

Yep, it's room right next to the fellers debating teleological vs. deontological ethics.

Now, who wants to argue about free will and determinism?

masonryman · « **Reply #365 on:** April 10, 2009, 09:59:28 AM »

Quote from: alltherightpills on April 10, 2009, 09:28:22 AM

Quote from: seaweb11 on April 09, 2009, 08:59:54 PM
sorry, oil thread is down the hall on your left.

Yep, it's room right next to the fellers debating teleological vs. deontological ethics.

Now, who wants to argue about free will and determinism?

deontological ethics?

Is that kinda like be living the primary reason for religion is to keep the poor from killing the rich

sangyo soichiro · « **Reply #366 on:** April 10, 2009, 10:06:52 AM »

In case anyone has missed the article I linked to before, I want to emphasize one thing the article makes clear...

Quote

The airplane/treadmill [...] contains a basic ambiguity, and people resolve it one of a couple different ways. The tricky thing is, each group thinks the other is making a very simple physics mistake. So you get two groups each condescendingly explaining basic physics and math to the other.

The ambiguity lies in the statement
"...the runway will match the speed of the airplane's wheels...."

To understand the ambiguity, I recommend reading
http://blag.xkcd.com/2008/09/09/the-goddamn-airplane-on-the-goddamn-treadmill/comment-page-8/.
It is not a long article, and the author explains it well.

sangyo soichiro · « **Reply #367 on:** April 10, 2009, 10:08:25 AM »

...and one other thing...
This question is more about the question than the answer....

Industrial Cafe · « **Reply #368 on:** May 08, 2009, 08:47:05 PM »

check it out suckas!

no, the wingspan it too wide

DammitDan · « **Reply #369 on:** May 08, 2009, 10:24:53 PM »

Nooo!! Quick, put it back in its cage!

HavocTurbo · « **Reply #370 on:** May 17, 2009, 11:09:38 PM »

Quote from: DammitDan on May 08, 2009, 10:24:53 PM

Nooo!! Quick, put it back in its cage!

Too late....

My vote says it'll clear that display with tire marks.

seaweb11 · « **Reply #371 on:** May 18, 2009, 12:34:49 AM »

Dude...your back online. How ya feeling?

my78k · « **Reply #372 on:** May 18, 2009, 03:55:06 AM »

Since you were just wrecked we'll give ya a free pass....if it was anyone else dragging this thread back up though there would likely be a lynching!

Dennis

333 · « **Reply #373 on:** May 18, 2009, 07:13:34 AM »

My thoughts exactly. If you wanted to be silly, you could have easily gone to the SPBT, where, if you can believe it, you are loved even more than the in rest of the forum.

oldfordguy · « **Reply #374 on:** May 18, 2009, 11:36:58 AM »

I can't believe people are voting that the airplane won't take off! Good Lord, this is simple, basic, beginning fluid dynamics people! How many of you also believe that a heavier object falls faster than a lighter one? Shall we take a poll on that, too?

News:

Poll

Can this airplane lift off?

Author Topic: Can this airplane lift off? (Read 31125 times)

masonryman