Stock Fan Blade Question
Thread Starter
Instructor
Joined: Oct 2000
Posts: 111
Likes: 0
From: HOUSTON , TEXAS , USA
Stock Fan Blade Question
My stock '74 fan has 7 blades and is 17.5" diameter. One of the blades is about 1/2" closer to the rear of the shroud than all of the others. Is this normal design or do I have one blade bent? Does not look to be. Thinking of having chrome plated, but do not want to do a bad fan. Can someone check theirs and advise. Thanks in advance.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
Re: Stock Fan Blade Question (CORKYVET)
Stock fan blades for the most part aren't symetrical. The reason is to move the vortex of air around the radiator. Think of a bathtub. When you pull the plug the water creates a vortex (funnel) as it goes down. A symetrical fan will do the same and only pull air through the center of the radiator. By offsetting the blades the vortex moves around the radiator pulling in air from all areas. At least that's the way it was explaned to me.
Thread Starter
Instructor
Joined: Oct 2000
Posts: 111
Likes: 0
From: HOUSTON , TEXAS , USA
Re: Stock Fan Blade Question (CORKYVET)
It just seems odd only one blade of seven would be out of line with all the others. If someone else can check out their fan, otherwise I will see if if there are any at the Corvette Expo in Houston this weekend to take a look at.
