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Author Topic: Aeroplane Conundrum  (Read 22885 times)

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Offline Barman

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Aeroplane Conundrum
« on: April 28, 2007, 04:19:47 PM »
I saw this on another board and couldn?t believe the amount of discussion that ensued ? to me the answer is obvious (but I won?t tell you what I think yet).

What thinks you lot?

Quote from: Another board
A plane is standing on runway that can move (some sort of band conveyor). The plane moves in one direction, while the conveyor moves in the opposite direction. This conveyor has a control system that tracks the plane speed and tunes the speed of the conveyor to be exactly the same (but in opposite direction).

The question: Will the plane takeoff?
« Last Edit: April 28, 2007, 05:00:52 PM by CyprusGrump »
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Offline Snoopy

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Re: Aeroplane Conundrum
« Reply #1 on: April 28, 2007, 04:47:23 PM »
Yes ............... Er ....................No ............................ Er ...........................Maybe confused:
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Offline Barman

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Re: Aeroplane Conundrum
« Reply #2 on: April 28, 2007, 04:47:56 PM »
Quote from: Snoopy on April 28, 2007, 04:47:23 PM
Yes ............... Er ....................No ............................ Er ...........................Maybe confused:
Banghead
« Last Edit: May 02, 2007, 05:07:05 PM by Bouncer »
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Offline Snoopy

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Re: Aeroplane Conundrum
« Reply #3 on: April 28, 2007, 04:59:54 PM »
Look ~ I only used to mend them ..... flying the damn things wuz Hofficer's work.
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Re: Aeroplane Conundrum
« Reply #4 on: April 28, 2007, 05:03:20 PM »
Here ? I?ve added a poll to make it easy for the lower ranks.  wink:
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holly

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Re: Aeroplane Conundrum
« Reply #5 on: April 28, 2007, 05:35:22 PM »
I'm going to say no!













Just so that you can all laugh at me when I get it so terribly wrong.  redface:
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Re: Aeroplane Conundrum
« Reply #6 on: April 28, 2007, 05:36:18 PM »
Vote then!  noooo:
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Offline Snoopy

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Re: Aeroplane Conundrum
« Reply #7 on: April 28, 2007, 05:36:58 PM »
I did I did I did
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holly

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Re: Aeroplane Conundrum
« Reply #8 on: April 28, 2007, 05:38:59 PM »
Happy now!
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Offline Barman

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Re: Aeroplane Conundrum
« Reply #9 on: April 28, 2007, 05:43:28 PM »
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Misunderstood

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Re: Aeroplane Conundrum
« Reply #10 on: April 29, 2007, 03:43:38 PM »


Quote from: Another board
A plane is standing on runway that can move (some sort of band conveyor). The plane moves in one direction, while the conveyor moves in the opposite direction. This conveyor has a control system that tracks the plane speed and tunes the speed of the conveyor to be exactly the same (but in opposite direction).

The question: Will the plane takeoff?


Absolutely not.  If the conveyer and aircraft speed is equal then it will be stationary.

If it is stationary then it cannot generate the lift needed to rise.
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Offline Snoopy

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Re: Aeroplane Conundrum
« Reply #11 on: April 29, 2007, 03:58:14 PM »
Quote from: Bouncer on April 29, 2007, 03:43:38 PM


Quote from: Another board
A plane is standing on runway that can move (some sort of band conveyor). The plane moves in one direction, while the conveyor moves in the opposite direction. This conveyor has a control system that tracks the plane speed and tunes the speed of the conveyor to be exactly the same (but in opposite direction).

The question: Will the plane takeoff?


Absolutely not.  If the conveyer and aircraft speed is equal then it will be stationary.

If it is stationary then it cannot generate the lift needed to rise.

Now let's not be silly here ~ No airport has yet managed to get moving "walkways" and their handrails to syncronise ie move at the same speed ~ how the hell does anyone think they are going to get an aircraft and conveyor to move in opposite directions at the same speed?
It's like .... er .... patting your head with one hand and rubbing your belly in a circular motion with the other hand at the same time ~ just not do-able.
I am ex RAF you know ..... we know what is not possible (most things actually)
« Last Edit: May 02, 2007, 05:08:07 PM by Bouncer »
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Misunderstood

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Re: Aeroplane Conundrum
« Reply #12 on: April 29, 2007, 04:23:05 PM »
I have a witness to verify clockwise and anti-clockwise tummy rotations and head pats with either hands at will.

Shoulda joined the army......    point:



Postscript:

How far can you lower a rope down a hole?

No tricks.
« Last Edit: April 29, 2007, 04:40:49 PM by Misunderstood »
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Offline Snoopy

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Re: Aeroplane Conundrum
« Reply #13 on: April 29, 2007, 05:08:12 PM »
Quote from: Bouncer on April 29, 2007, 04:23:05 PM
I have a witness to verify clockwise and anti-clockwise tummy rotations and head pats with either hands at will.

Shoulda joined the army......    point:



Postscript:

How far can you lower a rope down a hole?

No tricks.


I am impressed ~ it is all I can do to turn the pages of the magazine with one hand these days!



Edit: This board is getting harder to use too.  What's with this quick reply stuff ~ I can't find the emots on it!
« Last Edit: May 02, 2007, 05:08:41 PM by Bouncer »
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Misunderstood

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Re: Aeroplane Conundrum
« Reply #14 on: April 29, 2007, 05:09:47 PM »
Quote
I am impressed ~ I can hardly manage to turn the pages of the magazine one handed these days.

Aha.. now that's a different matter altogether!   The circle and pat thing has been one of those 'Party tricks' I could always do like the 'Vulcan' salute.

It was supposed to make me able to play the piano - but I could never get my two hands doing different things in that way - a complete failure!  I can however, play each half separately one at a time.  Very useful.
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