
FoilSim
Lift Relationships
Answers


1. What is the value of lift for 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

6.26
lb.

4 degrees

12
lb.

8 degrees

24
lb.

16 degrees

49
lb.

3. On the graph below, graph the values for Angle and
Lift. (Place the Angle on the yaxis and the
Lift On the xaxis.)
.
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

.78
lb.

50 mph

3.13
lb.

100 mph

12.5
lb.

200 mph

50
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
