To avoid these ads, REGISTER NOW!

Vintage Coolair Fan

R

Richard D

Well-known member
Joined
Jan 19, 2007
Messages
1,922
Location
Texas City, between Houston and Galveston
I aquired a 48" Coolair fan this weekend out of a 112 year old house in Bryan, TX. I contacted the manufacturer and the only info was a bulletin from 1941.



Mine is the Model 4-O, 48", 8 blades. Now it has a 3/4 hp, 1745 rpm motor. It tripped the thermal protector on the motor when I got it home and left it running, but it was plugged into a pretty small cord. I'd like to spin it faster, not sure what motor to use. I'd considered a 3/4 hp 3450 motor, what do you guys think?

Mine is the model at the bottom of the chart. They show motor H.P., fan R.P.M., but no motor R.P.M.
 
Last edited:
To avoid these ads, REGISTER NOW!
OP
R

Richard D

Well-known member
Joined
Jan 19, 2007
Messages
1,922
Location
Texas City, between Houston and Galveston
Motor and belt are fairly new. He pulled the unit out when he installed central A/C. The fan/motor assembly is spring mounted, I'll get more pictures later. Looks like the original crating is still attached; unfortunatley I'll be removing that when I mount the fan on a swivel.

P.S. Nice product you offer, I just ordered a "Bald Eagle" pack to share with my buddies. Advertizing on Garage Journal works!
 
Last edited:
To avoid these ads, REGISTER NOW!
F

Freejack

Well-known member
Joined
Aug 8, 2007
Messages
555
Location
St. Peters MO
If you are not changing the pulley ratios, you are likely spinning that fan a lot faster than for what it was designed. I am surprised you are not way past overloaded on that 1.5hp motor. Here is what I would do if you just have the 1.5hp 3600 ROM motor - find a motor drive pulley that gets you to the correct ratio to spin the fan at 400 RPM per the chart in the brochure. On a 3600 RPM motor that would be around 9:1. The problem is that just judging by the driven pulley that would be a drive pulley of less than 1.5" diameter....

Really need to find the right 1725 RPM motor, then the right pulley to get to the spec RPM.

Jake
 
L

LS6 Tommy

Well-known member
Joined
Dec 27, 2013
Messages
26,162
Location
Northern NJ
Freejack said:
If you are not changing the pulley ratios, you are likely spinning that fan a lot faster than for what it was designed. I am surprised you are not way past overloaded on that 1.5hp motor. Here is what I would do if you just have the 1.5hp 3600 ROM motor - find a motor drive pulley that gets you to the correct ratio to spin the fan at 400 RPM per the chart in the brochure. On a 3600 RPM motor that would be around 9:1. The problem is that just judging by the driven pulley that would be a drive pulley of less than 1.5" diameter....

Really need to find the right 1725 RPM motor, then the right pulley to get to the spec RPM.

Jake
Click to expand...


X2. Grandma had a Coolair whole house fan in her attic. I distinctly remember the logo and the blue paint. Hers wasn't that big. Good score!

Tommy
 
F

Falcon67

Well-known member
Joined
Jun 11, 2009
Messages
18,371
Location
Merkel, TX
Think if you spin that much faster than designed your patio might start looking like something from Sikorsky.
 
You must log in or register to reply here.
To avoid these ads, REGISTER NOW!
Top Bottom