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AIR RACE SPEED TABLE This table will enable you to determine the average speed in miles per hour of each airplane as it makes one complete lap of the 2-1/2 mile course. For example: An airplane that takes 40 seconds to make one complete lap of the 2-1/2 mile course is traveling 225 miles per hour. [[2 column table]] |2-1/2 Mile Course|Average Speed| |Seconds|Miles Per Hour| |---|---| |:39.6|227.272| |:40.0|225.000| |:40.4|222.773| |:40.8|220.589| |:41.2|218.447| |:41.6|216.345| |:42.0|214.285| |:42.4|212.264| |:42.8|210.280| |:43.2|208.333| |:43.6|206.422| |:44.0|204.546| |:44.4|202.703| |:44.8|200.894| |:45.2|199.114| |:45.6|197.368| |:46.0|195.652| |:46.4|193.965| |:46.8|192.308| |:47.2|190.678| |:47.6|189.076| |:48.0|187.500| |:48.4|185.951| |:48.8|184.426| |:49.2|182.926| |:49.6|181.541| [[2 column table]] |2-1/2 Mile Course|Average Speed| |Seconds|Miles Per Hour| |---|---| |:50.0|180.000| |:50.4|178.571| |:50.8|177.165| |:51.2|175.782| |:51.6|174.419| |:52.0|173.077| |:52.4|171.755| |:52.8|170.454| |:53.2|169.173| |:53.6|167.910| |:54.0|166.667| |:54.4|165.441| |:54.8|164.234| |:55.2|163.044| |:55.6|161.871| |:56.0|160.714| |:56.4|159.574| |:56.8|158.450| |:57.2|157.343| |:57.6|156.250| |:58.0|155.173| |:58.4|154.110| |:58.8|153.062| |:59.2|152.027| |:59.6|151.006| |:60.0|150.000| This table is for determining the average speed over a 100 kilometer course. (62.14 miles). An airplane that takes 6 minutes and 13 seconds to make one complete lap is traveling 599 plus miles per hour. [[2 columned table]] |100 Kilometer Course (62.14 Miles)| Average Speed| |Minutes and Seconds| Miles Per Hour| |---|---| |6:13|599.743| |6:16|594.957| |6:19|590.248| |6:22|585.613| |6:25|581.049| |6:28|576.557| |6:31|572.133| |6:34|567.777| |6:37|563.486| |6:40|559.260| |6:43|555.097| |6:46|550.995| |6:49|546.953| |6:52|542.971| |6:55|539.046| |6:58|535.177| |7:01|531.363| |7:04|527.604| |7:07|523.897| |7:10|520.242| |7:13|516.637| |7:16|513.083| |7:19|509.576| |7:22|506.118| |7:25|502.706| |7:27|500.456| Official timing watch for the 1951 National Air Races Longines The World's Most Honored Watch Accepted as official watch for timing championship sports events in all fields all over the world 10 Worlds Fair grand prizes Authorized Agency Longines Wittnauer Watches Sales and Service 28 Gold Medals, highest accuracy awards Sold by more than 4,000 fine jewelers who proudly display this emblem 1951 National Air Races 45