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Know All the Angles
Activity Sheet #1
Key
Directions: Use the data table below to help Martin Northrop answer
his questions.
- For Test #1 looking at points #1 – 10, what is the difference in lift
between the greatest weight and the lowest weight?
- For Test #2 looking at points #1 – 10, what is the difference in drag
between the greatest weight and the lowest weight?
- Which angle of attack (alpha) overall generated the greatest amount
of lift?
- Which angle of attack (alpha) overall generated the least amount of
drag?
- Which angle of attack (alpha) overall generated the lowest L/D?
- Which angle of attack (alpha) overall generated the greatest L/D?
- For Run #1, looking at Points # 1-10, find the greatest L/D. 14.67
- For Run #1, looking at Points #1-10, give the number following the
greatest L/D.10.00
- Using the information from questions 7 and 8, what is the angle of
attack (alpha) at which the glider is not generating as much lift as
it was before?
- Overall, which angle of attack (alpha) generates the greatest CL?
- Overall, which angle of attack (alpha) generates the lowest CL?
- Overall, which angle of attack (alpha) generates the greatest CD?
- Overall, which angle of attack (alpha) generates the lowest CD?
- Overall, which angle of attack (alpha) do you think is the stall angle?
Explain your reasoning. (Hint: Look over your answers for questions
7 – 12.)
9 degrees because the model being tested is increasingly generating
lift until it gets to 9 degrees and then lift begins to steadily decrease.
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