Page 68 - FanPedia - By Twin City Fan and Blower

FAN-PEDIA PROPELLERS

Published by
Twin City Fan & Blower AIRFLOW/ROTATION OVERVIEW
©2017 TCF.COM

FIXED PITCH PROPELLERS - Cast/Fabricated (AIRFLOW = PM) AIRFLOW = PM (AIR THROUGH PROP THEN MOTOR)
Rotation is determined by viewing the propeller
Airflow Direction from the discharge side of the fan.

Leading Edge of Blade

- Air is drawn through the propeller from the leading Intake Side
edge of the blades.
- The concave side of the blade cups the air and
pushes it away from the prop Airflow Direction
air passes through
Prop then over Motor
(Airflow = PM)
aka: Hub on Intake

Discharge

RH Rotation

Intake

RH Rotation
NOTE 1: Airflow direction and rotation must be correct in order for
the fan to operate at 100% performance.

NOTE 2: If the propeller rotates in the wrong direction, you will not
get any airflow at all in the proper direction.
35