The rigid character of parafoil was analyzed. A position prediction method based on differential coefficient for parafoil control rope pulling course was put forward. The purpose was to improve airdrop precision.

通過翼傘系統(tǒng)的剛性特性出發(fā)一级片黄色网站，提出了一種基于微元分析的翼傘操縱繩拉動過程中的運動位置解算方法免费A级特黄真人大片，有利于提高翼傘空投的精度。

On the base of former rigid wing model , new flap- wing model is developed by considering the deformation of wing and the change of flapping velocity, so it can simulate the flap motion of bird wing better.

本文在原有勻速剛性模型的基礎上九九免费黄色视频，提出考慮了撲翼形狀變化和撲動速率變化的撲翼分析模型欧美艹艹爱，使之更接近鳥翼柔性撲動真實情況。

In addition, it's computed that how the aerodynamic force of flexible flapping-wing changes with flap parameters, such as flap angle, flap frequency, and so on. The computed results explained why bird wing have different flap motions in different phases of flight, and provide theory for future design work of flapping-wing MAV.

此外熟女熟妇伦aⅴ网站美利坚，本文還模擬計算了時柔性撲翼氣動力隨撲動角18岁以下禁止观看一级毛片、撲動傾角等參數(shù)變化的情況，從而從氣動的角度解釋了飛鳥在不同飛行階段的撲翼規(guī)律jizzjizz小视频，并為柔性撲翼飛行器的設計提供了理論依據(jù)欧美激情三区。

ROTOR SYSTEM: Two-bladed main rotor with small two-blade servo-rotor above main rotor and two-blade tail rotor.

轉子系統(tǒng)：雙主旋翼葉片小二葉伺服轉子和兩個以上的主旋翼，尾旋翼葉片原始人交性视频。

The tail flats feature swept-back tips forward of the swept-back and tapered fin with a blunt tip.

尾平翼特征是頂端有一個上端后掠的垂直安定翼和錐形尾垂翼具有一個鈍形頂端五月天色婷婷综合。

The tail boom tapers from the main body to the swept-back, tapered fin with a rotor on the right. Two flats are mounted on the both side of the boom.

尾梁從機身漸細到后掠尾垂翼狂插网，尾螺旋槳在錐形尾垂翼右側，二個尾平翼被裝在尾梁兩側a片网站免费在线观看。

With its shorter wings (2 metres less wingspan) and its square-tipped wings, the Bf 109 was more manoeuvrable and slightly faster. It is of interest that the English later on clipped the wings of the Spitfire.

靠著稍短的主翼(翼展少了約2公尺)和方形翼尖A∨精品男人的天堂，109擁有更好的操縱性及微快的速度(這似乎讓英國佬后來決定把噴火式的翼尖切掉了)。

To combat this aerodynamicists need to speed up the flow near the wings surface, to do this they split the wing into separate elements, this creates a slot.

為了改善這種狀況日韩一区二区电影网站视频，空氣動力設計者把尾翼分成了獨立的幾片小翼四五月婷婷色播播，小翼中間留出了一點空隙，尾翼上表面的高壓氣流通過這些縫隙流到了下表面青青青手机视频免费观看，這樣就加速了翼下氣流的速度精品人妻综合文学。

In the icing research,we construct three different ice shapes: sharp-angled ice,blunt nosed ice and double horn ice.

對翼型結冰問題，在結冰條件下娇喘高潮福利免费网站，利用數(shù)值方法分析研究翼型和多段翼型繞流流場及氣動特性的影響99视频在线精品国自产拍免费观看。

This method is based on the blade second-order lifting-line model, the full-span free wake model, panel model for the fuselage and rotor trim model. By iterating induced velocities on the fuselage surface caused by rotor/wake and those on the rotor plane/wake caused by fuselage, a comprehensive analytical model is established.

該方法建立在槳葉的二階升力線模型、旋翼的全展自由尾跡模型国产精品视频h、機身的源面元模型操人黄色性爱在线、旋翼的配平模型的基礎上，通過迭代旋翼/尾跡在機身上的誘導速度和機身在槳盤平面好爽好舒服要高潮了视频在线观看、尾跡定位點的誘導速度亚洲影院在线观看播放，形成一個全耦合的綜合分析模型。