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What has the author Richard Shiu Wing Cheung written?
Richard Shiu Wing Cheung has written: 'Numerical prediction of propeller performance by vortex lattice method' -- subject(s): Vortex methods, Propellers
How do you calculate the percentage of a propellers immersion?
Propeller Immersion : (dA - (xtip X Trim)/Lpp - H) / Dpx100 (in %)Where dA : Draught at A.P (in m)H : Height of lowest tip of propeller bladeDp : Propeller Diameterxtip :x Position of propeller tip from A.P (in m)Lpp : Length Between perpendicular of the ship.================Mosfofa Sowkot ImranNaval ArchitectBangladesh University of Engineering & Technology (BUET)
Does the wing tip vortex on a plane cause turbulence?
Yes. This is part of what is called wake turbulence.
What causes prop wash?
Prop wash is caused by a passing propeller driven aircraft. The spinning prop creates a vortex like wind that can be quite violent.
How long from tip to tip is a Spitfires two blade prop?
Only the first 77 Spitfires had a 2 blade wooden propeller. This was about 8.5 ft tip to tip. All later models had 3,4, 5 or 6 blade propellers of about 9 feet tip to tip.
How do you get a propeller cap on clubpenguin?
All the propeller caps on clubpenguin was free at parties hope this helps Stepheny1(clubpenguin username)
Is a prop shaped like a airfoil?
Yes. Propeller blades are much like the wings of an airplane. On a propeller the airfoil chord, twist and camber are change drastically from root to tip - more than on a wing.
Why do some aeroplanes have a bend at the end of the wing?
The small "winglet" at the tips of the wings increases the lift by forcing a vortex to remain at the wingtip. An airplane wing forces air downward. At the same time, air from below the wing leaks around the wingtip and moves to the top, and a rotating "vortex" appears at the wingtip. Sometimes the location of this "leakage" process moves away from the wing tip, and the vortex migrates inboard along the wing toward the fuselage. The vortex then extends from the middle of the wing and not from the tip. When this occurs, negative lift is produced by the part of the wing outside the vortex location. The function of the small winglet is to increase lift by forcing the vortex back to the wingtip. to improve lift at the tip of the wing by redirecting and smoothing airflow - otherwise some wings at the tip have practically no lift, or in other words are nearly stalled - although its easy to see the large upwards pointing winglets on larger aircraft, some smaller aircraft (usually ones with high wings) also have a smaller version that is a slightly down curved wing tip that does the same thing Some aircraft have small winglets at the tip of the wings. This improves the lift of the wing. As the airflow passes over the wing, the flow on top of the wing has to travel a longer distance, so it speeds up and thus reducing pressure. This reduction in pressure on Top of the wing and the increase in pressure of the air flowing along Bottom of the wing produces the lift. However, the airflow wants to travel the path of least resistance. So, it tends to move Outboard away from the fuselage and toward the tip of the wing. The airflow at the tip slides off the end of the wing and produces a Vortex. This vortex can sometimes be seen under certain atmospheric conditions as vapor trails or contrails. This vortex is a lost Lift. The winglets reduce this vortex greatly and thus prevents lost lift.
How do propellers work in reverse thrust?
The propeller blades are angled in the opposite direction, sort of like an airplane flying on its back. Of course, the propeller's blade twist from hub to tip is inappropriate, and the camber of the airfoil is wrong when thrust is reversing, but efficiency of the propeller is not of paramount importance during that phase of operation.
Why is there a twist in a propeller blade?
to keep the angle under which propeller section sees the relative velocity. Because, a propeller essentially is a wing which rotates around an axis parallel to the flight velocity. wings operate best at a certain angle of attack, which is an angle at which wing 'sees' the flow. now, propellers rotate and tangential velocity increases from root to tip. airflow velocity is obviously constant. tangent of angle between relative velocity and prop section is air velocity / tangential velocity. we want angle between propeller section and relative velocity to constant, since tangent changes from root to tip , we need to change angle of propeller section itself.
Where is the propeller cap in club penguin secret mission?
No, you got it on puffle day for free.
How come many piston engines on aircraft have an output at 2700 RPM is it a special number or something?
Yes, in fact, it is. There is a definite limit that the sound barrier imposes on a propeller's efficiency. 2700 rpm represents a compromise between the tip of the propeller breaking the sound barrier (which lowers propeller efficiency) and optimum propeller efficiency. Typically, the longer a propeller, the more slowly it turns. Racing propellers are typically shorter, and turn at higher rpm: 3000 - 3300. But even with racing props, there is an ultimate efficiency attainable at high speeds.
