Page 65 - FanPedia - By Twin City Fan and Blower

FAN-PEDIA PROPELLERS

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

AIRFLOW = PM (AIR THROUGH PROP THEN MOTOR)
ADJUSTABLE PITCH PROPELLERS (AIRFLOW = PM)
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
LH Rotation

Intake

NOTE 1: Airflow direction and rotation must be correct in order for LH Rotation
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.
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