最近研究點樣可以Fine Tune部機...
睇咗其中一份資料, 解說3D Settings...
提到摩打攻角需要做到Right Thrust及Up Thrust...
從初學到依家, 從來都諗過要Set摩打上攻角...
但睇完解釋之後, 又覺得幾有道理, 當然, 上攻角設定係針對3D Maneuver...
跟住睇番啲Trimming Guide, 發現咗一段Footnote, 解釋咗我之前嘅疑惑...
Symmetric翼型嘅設計, 果然係要加少少Up Elevator, 去保持整體上攻角, 抵消地心吸力...
In order to maintain level upright flight, the wing of a plane with a symmetrical airfoil wing needs to have a positive Angle of Attack (AOA, usually less than 1 degree). This positive angle provides the lift required to cause the plane to fly level.
If the plane is balanced slightly to the nose heavy side (required for pitch stability), it will require a slight up elevator trim to hold level flight.
A plane with a zero/ zero wing to elevator angle will also need a slight amount of up elevator trim to hold level flight.
Therefore, a plane trimmed in this manner will have a tendency to pull to the canopy on a straight, thumbs off, down line because the elevator is controlling the AOA of the wing.
搵一日無乜風, 住份Trimming Guide, 認真Trim一次部機, 睇吓效果如何...
其實份Trimming Guide之前都睇過幾次, 不過無深入研究...
事隔一排再睇番, 又有另一番體會...
依家集中研究點樣Trim好CG位置, Rudder, Elevator及Thrust Angles...
睇咗幾份資料, 每份所列出嘅方法都有少少唔同, 有時間的話會做番份Summary, 對將來做Fine Tune會好有幫助...
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