longitude, my last invention for the royal navy, sorry for delay
 

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

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/...81cbfea71b.jpg
http://www.thescienceforum.com/attac...s_cage_a_p.jpg

http://cdn03.cdn.thesuperficial.com/...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

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-m...471410762?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/_Tsl9yZzhzE...Moon+clock.jpg

blame it on fluorine this is actually pretty petty simple

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/attac...10111-0114.jpg

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.

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 :)

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?

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