AI Assistant
Notifications
Clear all

Theoretically useless knowledge. No. 1

45 Posts
19 Users
0 Reactions
1,848 Views
scott-zelenak
(@scott-zelenak)
Posts: 601
Member
Topic starter
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Suppose I want to fly a plane from a mythical airport at the equator and 0 degrees longitude to another mythical airport at the equator and 180 degrees longitude.
Which direction should I fly?
And why?


 
Posted : October 13, 2016 6:21 pm
seb
 seb
(@seb)
Posts: 376
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Earth's rotation shouldn't matter.

Weather systems might. A good tail/head wind would change things.


 
Posted : October 13, 2016 6:37 pm
loyal
(@loyal)
Posts: 3735
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Depends on the plane.

If you can open a hyperspace window, then DOWN would be the shortest route, otherwise, I would go North or South.

Loyal


 
Posted : October 13, 2016 6:42 pm
rfc
 rfc
(@rfc)
Posts: 1966
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Scott Zelenak, post: 395098, member: 327 wrote: Suppose I want to fly a plane from a mythical airport at the equator and 0 degrees longitude to another mythical airport at the equator and 180 degrees longitude.
Which direction should I fly?
And why?

That's an easy one. West., if the objective is to take the shortest time. You don't say that, though, If there's some other objective, let us know. The answer might be different. To fly the shortest distance, the answer would be directly North or directly South (until either pole is reached, then directly South or North respectively.


 
Posted : October 13, 2016 6:48 pm
loyal
(@loyal)
Posts: 3735
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

rfc, post: 395101, member: 8882 wrote: That's an easy one. West.

Excellent...I didn't think of that variable!

Loyal


 
Posted : October 13, 2016 6:49 pm

dave-karoly
(@dave-karoly)
Posts: 11990
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Is the airplane on a treadmill which exactly matches the speed of the wheels?


 
Posted : October 13, 2016 6:54 pm
a-harris
(@a-harris)
Posts: 8759
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Flying west you will lose a day.
Flying east and you should arrive around the same day and time you left.


 
Posted : October 13, 2016 7:40 pm
loyal
(@loyal)
Posts: 3735
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

A Harris, post: 395107, member: 81 wrote: Flying west you will lose a day.
Flying east and you should arrive around the same day and time you left.

Wow, that's a FAST plane ya got there.

Loyal


 
Posted : October 13, 2016 7:54 pm
holy-cow
(@holy-cow)
Posts: 25672
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Thataway!!!!!!!! No matter the route you take the view at the target airport will look about the same no matter what direction you look.


 
Posted : October 13, 2016 8:25 pm
mark-o
(@mark-o)
Posts: 176
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

A Harris, post: 395107, member: 81 wrote: Flying west you will lose a day.
Flying east and you should arrive around the same day and time you left.

too funny!


 
Posted : October 13, 2016 8:28 pm

mark-o
(@mark-o)
Posts: 176
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

I say either due east or west. Any other heading and you end up at one of the poles!


 
Posted : October 13, 2016 8:30 pm
RADAR
(@dougie)
Posts: 7880
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Google says it's about 20020 KM


 
Posted : October 13, 2016 9:10 pm
RADAR
(@dougie)
Posts: 7880
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

did you know that there's an app that does your math homework?

[MEDIA=youtube]jeRCvbN_bLA[/MEDIA]


 
Posted : October 13, 2016 9:17 pm
a-harris
(@a-harris)
Posts: 8759
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

The secret is to cross International Dateline 😎


 
Posted : October 14, 2016 5:02 am
paul-in-pa
(@paul-in-pa)
Posts: 6034
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Scott Zelenak, post: 395098, member: 327 wrote: Suppose I want to fly a plane from a mythical airport at the equator and 0 degrees longitude to another mythical airport at the equator and 180 degrees longitude.
Which direction should I fly?
And why?

Scott,

First we have to know, do you want to go to 180å¡ East or 180å¡ West longitude?

Paul in PA


 
Posted : October 14, 2016 5:55 am

rfc
 rfc
(@rfc)
Posts: 1966
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Mark O, post: 395116, member: 11591 wrote: I say either due east or west. Any other heading and you end up at one of the poles!

Not if you keep flying. Besides, say you started off flying 045 degrees true. You wouldn't end up at a pole. The only way to end up at a pole is to fly 000 or 180, then stop at the pole.


 
Posted : October 14, 2016 7:14 am
rfc
 rfc
(@rfc)
Posts: 1966
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Paul in PA, post: 395137, member: 236 wrote: Scott,

First we have to know, do you want to go to 180å¡ East or 180å¡ West longitude?

Paul in PA

Both the same: the IDL.


 
Posted : October 14, 2016 7:17 am
paul-in-pa
(@paul-in-pa)
Posts: 6034
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

RFC,
Then one would have to fly both ways.

Paul in PA

rfc, post: 395150, member: 8882 wrote: Not if you keep flying. Besides, say you started off flying 045 degrees true. You wouldn't end up at a pole. The only way to end up at a pole is to fly 000 or 180, then stop at the pole.

Sorry,

If you fly at 45å¡ true you will eventually have a wingtip over the pole and after a few more laps you would be over the pole.

If you started at 45å¡ on a great circle route one would be continually changing the true direction.

It is simple Geodesy, but then again, you do not have a formal education.

Paul in PA


 
Posted : October 14, 2016 7:43 am
mathteacher
(@mathteacher)
Posts: 2243
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Constant bearing courses are rhumb lines, or loxodromes. On a spherical earth, they lead to a pole if followed far enough. It doesn't matter if the course is, say, 45 degrees true or 45 degrees magnetic; both will ultimately to to a pole, but they will follow different tracks.

Look here for more information: https://en.wikipedia.org/wiki/Rhumb_line

The result on an ellipsoidal earth is left as an exercise.


 
Posted : October 14, 2016 8:11 am
Tom Adams
(@tom-adams)
Posts: 3453
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

rfc, post: 395150, member: 8882 wrote: Not if you keep flying. Besides, say you started off flying 045 degrees true. You wouldn't end up at a pole. The only way to end up at a pole is to fly 000 or 180, then stop at the pole.

You would have to fly north until you get to the pole then, turn a 360å¡ angle and go south. 😉


 
Posted : October 14, 2016 8:22 am

Page 1 / 3