Christmas in an Auto Engineer’s Mind

Christmas in an Auto Engineer’s Mind

There are approximately two billion children (persons under 18) in the
world. However, since Santa does not visit children of Muslim, Hindu,
Jewish or Buddhist (except maybe in Japan ) religions, this reduces the
workload for Christmas night to 15% of the total, or 378 million
(according to the population reference bureau). At an average (census)
rate of 3.5 children per household, that comes to 108 million homes,
presuming there is at least one good child in each. Santa has about 31
hours of Christmas to work with, thanks to the different time zones and
the rotation of the earth, assuming east to west (which seems logical).
This works out to 967.7 visits per second. This is to say that for each
Christian household with a good child, Santa has around 1/1000 th of a
second to park the sleigh, hop out, jump down the chimney, fill the
stocking, distribute the remaining presents under the tree, eat whatever
snacks have been left for him, get back up the chimney, jump into the
sleigh and get onto the next house.

Assuming that each of these 108 million stops is evenly distributed
around the earth (which, of course, we know to be false, but will accept
for the purposes of our calculations), we are now talking about 0.78
miles per household; a total trip of 75.5 million miles, not counting
bathroom stops or breaks. This means Santa’s sleigh is moving at 650
miles per second — 3,000 times the speed of sound. For purposes of
comparison, the fastest man made vehicle, the Ulysses space probe, moves
at a poky 27.4 miles per second, and a conventional reindeer can run (at
best) 15 miles per hour.

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The payload of the sleigh adds another interesting element. Assuming
that each child gets nothing more than a medium sized LEGO set (two
pounds), the sleigh is carrying over 500 thousand tons, not counting
Santa himself. On land, a conventional reindeer can pull no more than
300 pounds. Even granting that the “flying” reindeer can pull 10 times
the normal amount, the job can’t be done with eight or even nine of
them—Santa would need 360,000 of them. This increases the payload, not
counting the weight of the sleigh, another 54,000 tons, or roughly seven
times the weight of the Queen Elizabeth (the ship, not the monarch).

600,000 tons travelling at 650 miles per second creates enormous air
resistance – this would heat up the reindeer in the same fashion as a
spacecraft re-entering the earth’s atmosphere. The lead pair of reindeer
would absorb 14.3 quintillion joules of energy per second each. In
short, they would burst into flames almost instantaneously, exposing the
reindeer behind them and creating deafening sonic booms in their wake.
The entire reindeer team would be vaporized within 4.26 thousandths of a
second, or right about the time Santa reached the fifth house on his
trip.

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Not that it matters, however, since Santa, as a result of accelerating
from a dead stop to 650 m.p.s. in .001 seconds, would be subjected to
acceleration forces of 17,000 g’s. A 250 pound Santa (which seems
ludicrously slim) would be pinned to the back of the sleigh by 4,315,015
pounds of force, instantly crushing his bones and organs and reducing
him to a quivering blob of pink goo. Therefore, if Santa did exist, he’s
dead now.

Merry Christmas.

Unknown source, thank you Laurentiu for the email!

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