安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Why is paper (or any tailless) airplane pitch stable?
By folding the trailing edge at least partially up, you will create a local area of lower lift (or actual downforce), which will see a proportionally stronger increase of lift when the whole paper airplane pitches up This results in a pitch-down moment, and vice versa This is all what is needed to give a paper airplane positive stability
- aerodynamics - What is the optimal design for a paper airplane? (Or, at . . .
Stability around the direction of movement Stability around the line of the wingspan Therfore, the optimum shape would have infinite area when seen from above, zero area when viewed from in front, zero weight, a vertical stabliser to stop rotation around the direction of movement, and good balance to prevent rotation around the line of the
- aircraft - Paper airplane physics - Physics Stack Exchange
I plotted the drag components for a glider below, but since the physics are the same for a paper airplane, this plot should do for now The nonlinear behavior of the induced drag curve at low speed is due to flow separation, and something very similar will happen for a paper airplane The important thing is: The drag curve has a minimum
- Effects of altitude on paper airplanes - Physics Stack Exchange
$\begingroup$ @Drjh: Here's how you establish up-trim in a paper airplane At the trailing edge of the wing, bend the wing up, or cut a little tab and bend that up That will make the airplane go slower (and stay up longer) Bend it straight or down, and the airplane will go faster (and descend faster) This is all assuming it is a bit nose-heavy
- How Does an Airplane Wing Work? A Primer on Lift - Physics Forums
In the same way, lift on an airplane wing has very little in common with a boat on water (unless that boat is a hydrofoil) I don’t know how much other evidence you need You already have said you don’t believe the 100+ years of textbooks that support my position
- (paper) Stability properties of Kerr BHs - Physics Forums
The "Kerr stability conjecture" stated in these papers, which is basically what they're attempting to prove as a theorem, refers to future null infinity and the "domain of outer communication", which indicates to me that the stability conjecture is only asserted regarding the exterior region (or possibly that plus some portion of the region between the outer and inner horizons)
- Paper helicopter experiment - Adding Weight Decreases Flight Time?
My original question was how adding weight to my paper helicopter made it fall faster because the only thing that changed was the weight and the design was kept the same Air resistance is what makes the paper helicopter fall slowly in the first place because as gravity pulls the helicopter down, air resistance opposes it in an upward direction
- Why Do Airplane Wings Have a Natural Forward Pitching Moment?
As for aircraft stability, most aircraft have center of gravity a bit in front of center of lift for some positive pitch stability, but aerobatic aircraft usually have neutral pitch stability, so that the pilot doesn't have to compensate to keep the aircraft moving in a precise straight line during a dive or a climb
|
|
|