| • |
2D
Airfoil Tests |
| • |
3D
Unpowered Test (Complete model) |
| • |
3D
Powered Test |
 |
| 2D Airfoil Test -
Develop a better leading edge shape with the
following goals: |
| • |
Higher CLmax |
| • |
Better Stall
Characteristics |
| |
|
This work is
done in concert with CFD |
| • |
Check improved
airfoil at the following conditions: |
| |
|
RN ~ 3x106 |
| |
|
RN ~ 600,000 (Tip of 3D
model) |
| • |
Develop
means to improve CLmax at low RN (Simulate higher
RN). |
|
Unpowered
Test - Test Baseline Aircraft |
| • |
Component Buildup |
| |
|
Understand source of problems |
|
Types
of Data Collected |
| • |
Force Balance |
| • |
Flow Visualization |
| |
|
China Clay |
| |
|
Oil Flow |
| |
|
Flow Angularity |
| |
|
Possibly Tufts |
| • |
If
time permits: |
| |
|
Wake Imaging (Shows flow
details) |
| |
|
Can be used to determine
span loading and bending moments. |
|
Powered
Testing |
| |
Power
Effects - Adding power produces one positive
effect and many negative |
| |
• |
The Good |
| |
|
Reduced stall speeds |
| |
• |
The Bad |
| |
|
Trim changes with power |
| |
|
Reduced pitch stability |
| |
• |
The Ugly |
| |
|
(Sometimes) Stall characteristics
get worse |
Good power on characteristics can only occur if
the aircraft has good characteristics power off.
|
At the present time the
E-2C does not have good
characteristics power off.
|
