Author 
Message 
Tracy Van Niel Senior Member Username: tracy_van_niel
Post Number: 102 Registered: 042002
 Posted on Friday, December 03, 2004  09:09 am:  
Apologies to all you engineers out there, I got the following sent to me in 1999 (so keep that in mind when you see the engineering assumptions and calculations). Subject: An Engineer's Christmas 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 percent 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 1/1000th 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 or 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. 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 thousands 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 themSanta 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 traveling at 650 miles per second creates enormous air resistancethis would heat up the reindeer in the same fashion as a spacecraft reentering the earth's atmosphere. The lead pair of reindeer would adsorb 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. Not that it matters, however, since Santa, as a result of accelerating from a dead stop to 650 mps in .001 seconds, would be subjected to acceleration forces of 17,000 g's. A 250pound 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! 
Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: lazarcitec
Post Number: 62 Registered: 052003
 Posted on Friday, December 03, 2004  10:51 am:  
Tracy You have way too much time on your hands.... however as a nice jewish boy, I always knew that. Happy Hannukah!! 
Kenneth C. Crocco Senior Member Username: kcrocco
Post Number: 17 Registered: 042003
 Posted on Tuesday, December 07, 2004  12:44 pm:  
Actually, he only visits nice kids, not the naughty. so that gives him plenty of time. his is alive after all. we parents fill in for the naughty kids. 
