Pitch Protractor - Greenheck VAB Installation, Operation And Maintenance Manual

Pitch Protractor

CROSSHAIR POINT
THIS EDGE (LINE) PARALLEL WITH INLET END OF HOUSING
®
Instructions
1. Align protractor template edge to corresponding axis.
2. Place trailing edge of blade on protractor crosshairs. Identify current pitch by
locating degree line the leading edge lies on.
3. Adjust blade to desired angle while maintaining trailing edge on the crosshair.
This requires repositioning of the protractor.
4. Use a marker to trace blade profile on pitch protractor or fan casing.
5. Adjust remaining blades to the traced profile.
6. Tighten blades as directed.
7. Remove pitch protractor from fan casing.
WARNING: PRINT PITCH PROTRACTOR USING A 1-TO-1 SCALE.
0°
5°
10°
15°
20°
25°
30°
35°
40°
Vane Axial Fans 9