"In Part 1, the elliptical lift distribution was defined by means of a geometric construction ... Simply stated, vertical lines are dropped from a semicircle to the baseline. The center of these verticals are then determined and a curve drawn which connects the determined points. The curve thus defined is an ellipse...
Read more from Part 4 of 'Twist
Distributions for Swept Wings' by Bill
Kuhlman. (link in bio)
Image: NASA / Tom Tschida | "The Prandti-D makes one of its early flights" in 2015.
#艺术[超话]#

♋ 9to6确定五月末出道

在组合中拥有清新清凉音色的两人突然在一起组成了小分队,钟亨与(全)珉奎组合的小分队将会展示出怎样的魅力,令人期待满满.

请多多关心
①韩剧《神圣的偶像》非正式打歌舞台https://t.cn/A6NrGvnS
②经典合唱cover冰雪奇缘韩版插曲《爱情是扇打开的门()》https://t.cn/A6Kmz8Tl
③TTK Challenge
like crazyhttps://t.cn/A6NrGvno
night dancer https://t.cn/A6NrGvna
Boom boom power https://t.cn/A6NrGvni
④饭制人体logo(否) https://t.cn/A6NrGvnX
⑤音乐剧相互评价https://t.cn/A6NrGvn9

黄老师双语段落分享（3460）1.《山坡羊·叹世·晨鸡初叫》 陈草庵
晨鸡初叫，
昏鸦争噪，
那个不去红尘闹？
路遥遥，
水迢迢，
功名尽在长安道。
今日少年明日老。
山，依旧好，
人，憔悴了。
Tune: Sheep on the Slope
O World
Chen Cao'an
At dawn cock crows,
At dusk caw crows.
Who to vanity fair is not eager to go?
Long long the way;
Far far the stream.
Only in the capital can you fullfil your dream.
Tomorrow old will grow the youth of today.
The hills are as green as before,
But the prime of youth is no more.
2.《晨鸡》 白居易
买得晨鸡共鸡语，
常时不用等闲鸣。
深山月黑风寒夜，
欲近晓天啼一声。
A Rooster

Bai Juyi
I bought a rooster from the market and to him I say,
"You need not crow leisurely in a coop near the lawn.
On a pitch-black night in a cold region far away
Do crow hard to herald the approach of dawn."