The airflow should be strong enough to lift a sheet of newspaper past 45 degrees.
Dyson fan noise problem.
Try to clean the blower section of the fan.
Dyson fans are notorious for getting clogged with dust at the bottom section and the turbine blades.
Get expert help troubleshooting from dyson to get the most out of your machine.
This may be causing the motor to work extra hard resulting in the noise i have posted an article on how to do this at the following link.
Look for blockages in the air inlet holes on the shroud and the ball.
Brush the outside of your machine with a soft brush to remove any debris from the shroud.
Hold a newspaper approximately 2 meters 6 6 away from the product with the airflow control dial turned to maximum.