Sunday, April 23, 2017

Sailing around the world in 74-109 days at 24 knots is possible on a flat earth


Flat earth map

In this figure you see the shortest path for sailing around the world on a flat plane:
A = 25E-45W, 60-22,5-50 South
B = 45W-75W, 50-70 South
C = 75W-150E, 70S-30N-60S
D = 150E-115E, 60S
E = 115E-25E, 60S-0S-60S

Average latitude

lat-av-A = (55+22.5)/2=38,75 = 128,75
lat-av-B = 60 = 150
lat-av-C = (155+60)/2 = 107,5
lat-av-D = 60 = 150
lat-av-E = (60+0)/2 = 30 = 120

Average radius (lat+90)

rad-av-A = 2*pi*6371*(128,75/360) = 14.316 km
rad-av-B,D = 2*pi*6371*(150/360) = 16.679 km
rad-av-C = 2*pi*6371*(107,5/360) = 11.953 km
rad-av-E = 2*pi*6371*(120/360) = 13.343 km

Approximate distance

dist-A = 2*pi*14.316*(25+45)/360 = 17.490 km
dist-B = 2*pi*16.679*(75-45)/360 = 8.733 km
dist-C = 2*pi*11.953*(180-150+75)/360 = 21.905 km
dist-D = 2*pi*16.679*(150-115)/360 = 10.188 km
dist-E =  2*pi*13.343*(115-25)/360 = 20.959 km

Total distance = 79.275 km = 42.805 seamiles

As they can sail around the world in 109-74 days they would sail at an average of 24 knots. This is very possible as for-instance the Groupama 3 has an average of 33 knots per hour. Or ABN AMRO TWO at 23 knots per hour.

Fore-going calculation is an approximation as we don't know what the real shape of the earth is and as we don't know what the correct map of the supposed flat earth looks like.

Source on speed: http://yachtpals.com/fastest-sailboats-2079
Original map source: http://www.hayatinanlaminedir.com/flatearth-grubundan-net-aciklama-dunya-yuvarlak-degil-duzdur/, https://www.theflatearthsociety.org/forum/avr/avatar_1460116_1463417280.png

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