FoilSim

Lift Relationships

Answers

1. What is the value of lift at the original parameters? 0 pounds

 

2. Determine the Lift value for each of the prescribed Angle levels, while keeping the other values the same.

Angle
Lift
0 degrees
0.0 lb.
2 degrees
0.627 x 10 lb.
4 degrees
1.253 x 10 lb.
8 degrees
2.501 x 10 lb.
16 degrees
4.952 x 10 lb.

3. On the graph below, graph the values for Angle and Lift. (Place the Angle on the y-axis and the Lift On the x-axis.)

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4. What is the relationship between angle and lift? By doubling the angle, you double the lift. It is a linear relationship

 

5. Write an equation that will sum up this relationship. Lift = Angle x constant

 

6. Using FoilSim, and keeping the angle set at 4 degrees, determine the Lift values for the following Airspeeds.

Airspeed
Lift
25 mph
0.078 x 10 lb.
50 mph
0.313 x 10 lb.
100 mph
1.253 x 10 lb.
200 mph
5.013 x 10 lb.

7. On the graph below, graph the values for Airspeed and the corresponding Lift levels.

 

 

8. What is the relationship between the airspeed and lift? By doubling the airspeed, you quadruple the lift.

 

9. Write an equation that will sum up this relationship. Lift = Airspeed squared x constant


Please send any comments to:
Web Site Related: Dale Morris (Dale.J.Morris@grc.nasa.gov), Technology Related: Tom Benson(Tom Benson@lerc.nasa.gov)