A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Piloting
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Myth: 1 G barrel rolls are impossible.



 
 
Thread Tools Display Modes
  #1  
Old June 17th 07, 09:51 PM posted to rec.aviation.piloting,rec.aviation.student
[email protected]
external usenet poster
 
Posts: 77
Default Myth: 1 G barrel rolls are impossible.

Poor misunderestanding boy. Consider the cirumstance when the moon's
shadow is cast on the earth. Every movement then, until it's 90
degrees displaced, has an acceleration component away from the sun.
For that matter, 180 degrees later, when it lies along the earth path,
moving toward the moon, it has an acceleration vector with a component
away from the sun.

Basic mechanics.

Heavens, I teach psych, and know this stuff.


  #4  
Old June 18th 07, 11:53 AM posted to rec.aviation.piloting,rec.aviation.student
[email protected]
external usenet poster
 
Posts: 77
Default Myth: 1 G barrel rolls are impossible.

Acceleration is defined as the rate of change of velocity. These
quantities are called vectors, not scalers, because there's a
direction associated with them, but we don't need to worry about that
right now.

There are times when the moon is accelerating away from the sun. That
does not mean its velocity is away from the sun, only that it is
decreasing. If it is decreasing then it is accelerating in the other
direction.

Mechanics are not part of the psych courses, you're quite right about
that. Never the less, the statement I made above is correct.

Also, for what it's worth, I'm not a pilot, at least not in the
certified sense. I probably get 50 hours of dual in a complex single a
year though, flying with my husband, and yes I know how to, in a real
airplane, fly a ILS approach under the hood to minimums and land.




On Jun 18, 2:49 am, Mxsmanic wrote:
writes:
Poor misunderestanding boy. Consider the cirumstance when the moon's
shadow is cast on the earth. Every movement then, until it's 90
degrees displaced, has an acceleration component away from the sun.
For that matter, 180 degrees later, when it lies along the earth path,
moving toward the moon, it has an acceleration vector with a component
away from the sun.


As I've said, plot the actual paths around the Sun. You'll see that the
moon's path is always concave to the Sun, that is, it is never accelerating
away from the star.

Heavens, I teach psych, and know this stuff.


I didn't think that celestial mechanics was part of the psychology curriculum.



  #7  
Old June 19th 07, 05:36 AM posted to rec.aviation.piloting,rec.aviation.student
Mxsmanic
external usenet poster
 
Posts: 9,169
Default Myth: 1 G barrel rolls are impossible.

El Maximo writes:

Quite frequently, actually.


No, show me a diagram. Draw the orbit to scale. You'll see.
  #8  
Old June 19th 07, 10:51 AM posted to rec.aviation.piloting,rec.aviation.student
El Maximo
external usenet poster
 
Posts: 292
Default Myth: 1 G barrel rolls are impossible.

"Mxsmanic" wrote in message
...
El Maximo writes:

Quite frequently, actually.


No, show me a diagram. Draw the orbit to scale. You'll see.


I did. Come take a look.


  #9  
Old June 19th 07, 04:30 PM posted to rec.aviation.piloting
Bertie the Bunyip[_19_]
external usenet poster
 
Posts: 3,851
Default Myth: 1 G barrel rolls are impossible.

Mxsmanic wrote in
:

El Maximo writes:

Quite frequently, actually.


No, show me a diagram. Draw the orbit to scale. You'll see.



You'd need a big sheet of paper for that, mmoron


Bertie
  #10  
Old June 18th 07, 09:42 PM posted to rec.aviation.piloting,rec.aviation.student
[email protected]
external usenet poster
 
Posts: 77
Default Myth: 1 G barrel rolls are impossible.

You may wish -- not that'd you do it, of course -- to look at any
basic physics text, or even a math text. Acceleration is discussed in
lots of places. You are confused by velocity and acceleration, but
then again you seem to be confused by lots of things.

I'd suggest you see a psychologist, but not this one, even though you
might be an interesting study. I work with kids at risk, might have
helped you 30 some years ago.

But probably not.







On Jun 18, 3:12 pm, Mxsmanic wrote:
writes:
There are times when the moon is accelerating away from the sun.


When?

That does not mean its velocity is away from the sun, only that it is
decreasing. If it is decreasing then it is accelerating in the other
direction.


Show your work.

Also, for what it's worth, I'm not a pilot, at least not in the
certified sense. I probably get 50 hours of dual in a complex single a
year though, flying with my husband, and yes I know how to, in a real
airplane, fly a ILS approach under the hood to minimums and land.


I'm not sure if that's sufficient to join the treehouse club. You'll have to
ask the little boys who run it.



 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dispelling the Myth: Hillary Clinton and the Purple Heart Otis Willie Naval Aviation 0 February 21st 06 05:41 AM
Impossible to ditch in a field (almost) mindenpilot Piloting 29 December 11th 04 11:45 PM
bush: impossible to be AWOL (do vets give a sh!t) B2431 Military Aviation 7 September 8th 04 04:20 PM
cheap, durable, homebuilt aircrafts- myth or truth? -=:|SAJAN|:=- Home Built 27 January 8th 04 09:05 AM
The myth that won't die. Roger Long Piloting 7 December 19th 03 06:15 PM


All times are GMT +1. The time now is 10:44 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 AviationBanter.
The comments are property of their posters.