Flappers - Terrence I Murphy - 图书 - Createspace Independent Publishing Platf - 9781720459767 - 2018年5月30日
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Flappers

价格
元 204
不含税

远程仓调货

预计送达时间 年6月9日 - 年6月25日
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When man first walked the earth, he noticed and studied the birds, bats, insects, etc. and it's logical that he attempted to emulate these beautiful, wild, flying creatures by attaching feathers to his arms and flapping them. People in legends and fairytales have always been able to magically fly and ancient Chinese, Persians, Romans, Arabs, monks, scholars, warriors and craftsmen have all tried to build flying machines. History has shown that humans couldn't fly by flapping: not with wings covering their arms or using any other device at the time. It wasn't until the 1930s when Alexander Lippisch and the NSFK (National Socialist Flying Corps) in Germany constructed and successfully flew a series of internal-combustion-powered ornithopters, using Hargrave's concept of small flapping wings, but with aerodynamic improvements resulting from methodical study.

介质类型 图书     Paperback Book   (平装胶订图书)
已发行 2018年5月30日
ISBN13 9781720459767
出版商 Createspace Independent Publishing Platf
页数 154
商品尺寸 178 × 254 × 8 mm   ·   276 g
语言 英语