View Full Version : longitude, my last invention for the royal navy, sorry for delay
raaaid
03-11-2012, 03:04 PM
all right do you remember phileas fog counted 80 days where only 79 passed by since he made a east revolution to erath?
sun and moon rotate opposite,sun is faster than moon in sky
so:
from greenwich a person counts sunsets and moonsets
he counts 28 sunsets and 29 moonsets
a sailor makes a revolution east to earth along which he counted 27 sunsets and 30 moonsets
so you make a device in whcih one nedel aims the sun
and a disc aims the moon in which theres a needle which you delay 1/28 every day
from greenwhich both neeldes will always coincide
after a revolution to earth along almost a month needles will delay TWO REVOLUTIONS along 360º
so if you can get a precision of 10th of the disc yyou can measure longitude with a precision of 5 degrees by measuring both needles difference :o
edit:
well travel around the wrold in 80 days anyone?
phileas fog counted 80 days where only 79 passed by since he made a east revolution to earth, from his point of view travelling one revolution to earth counted as one day
if you take a picture of the moon every day at same hour and animate it as a movie the moon will be moving contrary to the sun
so you go east travelling for one revolution so youll count one more sunset that if you didnt move, as phileas fog
but your following the moon orbit so you count one less moon
so travelling one revolution around earth makes you percieve a difference of sunset and moonset of 3 per evry 28 days while if you didnt move the diference would be of just one per 28, from here easy obtaining longitude just with a calnedar
http://www.youtube.com/watch?v=6nqN_7eGItM
raaaid
03-12-2012, 12:38 PM
http://en.wikipedia.org/wiki/Method_of_lunar_distances
Effect of Lunar Distance Errors on calculated LongitudeA lunar distance changes with time at a rate of roughly half a degree, or 30 arc-minutes, in an hour.[1] Therefore, an error of half an arc-minute will give rise to an error of about 1 minute in Greenwich Time, which (owing to the Earth rotating at 15 degrees per hour) is the same as one quarter degree in longitude (about 15 nmi (28 km) at the equator).
so without a clock its posible to measure longitude with 28 km mistake just with sextant and tables
one year of spheric trig, one of astronomy, one of navigation learning that the only solution of the longitude problem was clocks and thats no more after this thread
http://farm4.static.flickr.com/3036/2978351211_81cbfea71b.jpg
http://www.thescienceforum.com/attachments/astronomy-cosmology/502d1331557765-measuring-longitude-without-clock-nicholas_cage_a_p.jpg
http://cdn03.cdn.thesuperficial.com/wp-content/uploads/2011/09/0930-john-travolta-vampire-04.jpg
edit:
well in any case ill go on with my device to see if somone slips it though history
basically its a solar clock with a disc turning aiming at the moon with a needle you dealy each day 1/28
from greenwhich the needle on the disc aiming at the moon will always coincide with the sun shadow
now if youve traveled 180º east both needles ( the moon needle and the sun shadow) will have offset 24 hours
so 90º 12 hours
45º 6 hours
22º 3 hours
11 1.5 hours
5º 45 minutes
2º 22 minutes
1º 11 minutes
the days which you can see sun and moon you could measure very precisely
Sternjaeger II
03-12-2012, 03:38 PM
http://archiehopeful.files.wordpress.com/2012/02/win-concept-scream-of-happy-amazed-man-thumb9752028.jpg
raaaid
03-12-2012, 04:07 PM
all right here the bomb:
this clock dated 1500 can measure longitude with 1º error even if it delays 10 hour a day
http://itunes.apple.com/es/app/sun-moon-clock/id471410762?mt=8
how it works:
you correct every day the 10 hour delay by aiming the sun and moon dial to the sun and moon as you sail away
the 24 marks graduation is wrong it was used a 28 mark graduation
so if along a 28 day trip theyre ofset 28 marks you havent moved place
now if youve traveled 360º east along 28 days needles will be offset 72 hour , you substarct one for every day trip what gives you an offset of 48 hours
so every hour of offset in that clock is 7.5º of longitude since 48 hours of offset is 360º of longitude
http://1.bp.blogspot.com/_Tsl9yZzhzE8/TScG69rv0hI/AAAAAAAABXc/tDEL483NQNA/s1600/Sun-Moon+clock.jpg
raaaid
03-12-2012, 04:32 PM
http://archiehopeful.files.wordpress.com/2012/02/win-concept-scream-of-happy-amazed-man-thumb9752028.jpg
blame it on fluorine this is actually pretty petty simple
raaaid
03-12-2012, 07:12 PM
check it out i reinvented the ancient supressed clock:
a 28 hour dial ,one needel for the sun other for the moon and other to count days, you can get local or greenwhich time and longitude
http://www.thescienceforum.com/attachments/astronomy-cosmology/503d1331580948-measuring-longitude-without-clock-210111-0114.jpg
brando
03-12-2012, 08:49 PM
Raaaid,
Congratulations, on behalf of the Royal Navy and mariners everywhere, for your stunning re-discovery of latitude and longitude. It has been so long since we discovered it that we had almost forgotten its existence.
raaaid
03-12-2012, 08:57 PM
i would like to tell my navigation teacher about this
but i cant since he taught me it was imposible to solve the longitude issue without clocks
in fact solving an "imposible" problem was what cheer me to it
wait till i learn how to beat the casino and well talk :)
5./JG27.Farber
03-12-2012, 09:01 PM
i would like to tell my navigation teacher about this...
Forget him, why dont you talk to some Astronomers or NASA or the Royal Navy? You could make millions?! :-P
How do you actually get the device to point always at the sun and moon?
raaaid
03-12-2012, 09:04 PM
well i studied how to get longitude with a star and a clock and it was damn long a nd dificult
wouldnt be able to do it now
instead my device could be used by the drunkest dumbest sailor
usually in clear air at see at sunset you can also see the moon
still if you lose track of any you can keep aproximate though quite accurate track with a snad clock
edit:
well at moments like this i have to thank my mom for swithcing thinking i dont know while i actually know my coffe for half coffe half decafenaited
raaaid
03-12-2012, 09:26 PM
Raaaid,
Congratulations, on behalf of the Royal Navy and mariners everywhere, for your stunning re-discovery of latitude and longitude. It has been so long since we discovered it that we had almost forgotten its existence.
yeah using our lack of memory they swithc:
the sun dial by the minute dial
the moon dial by the hour dial
and the most sanguineous, the sunset count by the 2nd dial:shock:
also they switch the 28 hour dial by 12 hour
so now remember this is a really mans watch who travels around eithar by plane sail or on foot
http://www.thescienceforum.com/attachments/astronomy-cosmology/503d1331580948-measuring-longitude-without-clock-210111-0114.jpg
shows local sun time, shows local moon time, shows grenwhich local time of both sun and moon, SHOWS LONGITUDE, shows true north more precise than a compass
IN FACT IS SO COOL ITS MADE OF PAPER SO YOU COULD WIPE your bunghole with it if you were really desperate
now this is useless crab for preppy sissies:
http://www.russia2all.com/images/shop/product_images/5678/regular_3105-6973645.jpg
oh wait but it has some wings drawn:rolleyes:
edit:
seems the true calendar is been supressed-forgotten as well:
http://www.13moon.com/faq.htm
5./JG27.Farber
03-12-2012, 10:01 PM
well i studied how to get longitude with a star and a clock and it was damn long a nd dificult
wouldnt be able to do it now
instead my device could be used by the drunkest dumbest sailor
usually in clear air at see at sunset you can also see the moon
So basically its a sextant?
raaaid
03-12-2012, 10:16 PM
not really
is a sun moon dial
what has been supressed through history is the 28 hour graduation and the count of sunrises(or sunsets) dial
this supresion turn the clock in a useless pos
again check out the funtionability any kid could get from this WORKING paper sun-moon-count of days dial with 5 minutes explnation
shows local sun time, shows local moon time, shows grenwhich local time of both sun and moon, SHOWS LONGITUDE, shows true north more precise than a compass(though still figuring out the north thing but have to can be done)
brando
03-13-2012, 12:34 AM
I'm beginning to see why Drake and Nelson felt so confident.
raaaid
03-13-2012, 12:43 AM
oh here everybody says i lok english
they call me tony
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