As a result of an overwhelming lack of requests, and with reserch help from that renown scientific jounal SPY magazine (January, 1990) - I am pleased to present the annual inquiry to Santa Claus.
- No known species of reindeer can fly. BUT there are 300.000 species of living organisms yet to be classified, and while most of these are insects and germs, this does not COMPLETELY rule out flying reindeer which only Santa has ever seen.
- There are 2 billion children (people under 18) in the world. BUT since Santa doesn't (appear to) handle the Muslim, Hindu, Jewish and Buddhist children, that reduces the workload to 15% of the total - 378 million according to Population Reference Bureau. At an average (census) rate of 3.5 children per houshold, that's 91.8 million homes. One presumes there's at least one good child in each.
- Santa has 31 of Christmas to work with, thanks to the different time-zones and the rotation of earth, assuming he travels east to west (which seems logical). This works out to 822.2 visits per second. This is to say that for each Christian household with good children, Santa has 1/1000th of a second to park, hop out of the sleigh, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left, get back up the chimney, get back into the sleigh and move on to the next house. Assuming that each of these 91.8 million stops are evenly distributed around the earth (which, of course, we know to be false but for the purposes of our calculations we will accept), we are now talking about 78 miles per household, a total trip of 75-1/2 million miles, not counting stops to do what most of us do at least every 31 hours, plus feeding and etc.
This means that 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 on earth, Ulysses space probe, moves at a poky 27.4 miles per second - a conventional reindeer ca run, tops, 15 miles per hour.
- The payload on the sleigh adds another interesting element. Assuming that each child gets nothing more than a medium-sized lego set (2 pounds), the sleigh is carrying 321.30 tons, not counting Santa, who is invariably described as overweight. On land, conventional reindeer can pull no more than 300 pounds. Even granting that "flying reindeer" (see point #1) could pull TEN TIMES the normal amount, we cannot do the job with eight or even nine. We need 214,200 reindeer. This increases the payload - not even counting the weitght of the sleigh - to 353,430 tons. Again, for comparison - this is four times the weight of the Queen Elisabeth.
- 353,000 tons travelling at 650 miles per second creates enoumous air resistance - this will heat the reindeer up in the same fashion as space-crafts re-entering the earth's atmosphere. The lead pair of reindeer will absorb 14.3 QUINTILLION joules of energy per second each. In short, they will burst into flame almost instantaneously, exposing within 4.26 thousandths of a second. Santa, meanwhile, will be subjected to centrifugal forces 17,500.07 times greater than gravity. A 250-pound Santa (which seams ludicrously slim) would be pinned to the back of his sleigh by 4,315,015 pounds of force.
IN CONCLUSION - If Santa ever DID deliver presents on Christmas Eve, he's dead now.