Drawing 2D Velocity Structures?

AI Thread Summary
To draw 2D velocity structures, it's essential to represent the velocities of the plane relative to the air, ground, and air relative to the ground accurately. Typically, two of the three velocities are provided, and the third must be calculated. The velocities can be depicted using arrows, with the challenge being the correct placement of one vector at the start or end of another. Naming the vectors, such as VAP (velocity of the plane relative to the air), VAG (velocity of the plane relative to the ground), and VPG (velocity of the air relative to the ground), helps clarify their relationships. Remember to ensure that the arrows align with the vector equation AG = AP + PG for accurate representation.
justinh8
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Drawing 2D Velocity Structures?

Homework Statement


I need some help in drawing structures such as velocity of the plane relative to the air, velocity of the plane relative to the ground, and velocity of the air relative to the ground. Please give me some tips on how to drawing these, thanks!
 
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hijustinh8! :smile:

usually, you're given two out of the three velocities, and you're asked to find the third…

drawing the two given velocities is easy (mark them with arrows), the only difficulty is knowing whether to fit one onto the beginning or the end of the other!

to get that right , give them names like VAP VAG and VPG …

then all you have to remember is that the arrows must agree with the vector equation AG = AP + PG :smile:

see also the pf library on vector triangle :wink:
 
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