Page 70 - 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 = MP) AIRFLOW = MP (AIR OVER MOTOR THEN PROP)
AIRFLOW DIRECTION
Airflow Direction Rotation is determined by viewing the propeller
from the discharge side of the fan.
Leading Edge of Blade

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

RH Rotation Intake

Discharge

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.
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