Post by JW on Apr 8, 2007 22:04:31 GMT -5
In seeing the 6900 CFM rating for a new Original (an Archive at Home Depot), there is an asterisk stating that the readings were taken with the "Energy Star Method" for testing CFM. I wonder how this differs from a conventional testing method, and what method produced the 10,500 on the regular Original?
Reason why I ask, (and I know Archive blades are skinnier - but regular A model Originals are not), is if two motors push the same blades (reg. Original or A model) with the same pitch (15 degrees here) the same speed (200 RPM assuming the A model goes that fast), wouldn't the same CFM result?
You could technically make this argument with the 70s/80s Originals, which if I remember correctly were only rated at 7000 CFM. What if I took the four blades from an 80s Original (which had AT LEAST a 15 degree pitch if not 20) and put them on say a year 2000 model, and tested them both? Was the same method used back then as with the 2000 version?
Reason why I ask, (and I know Archive blades are skinnier - but regular A model Originals are not), is if two motors push the same blades (reg. Original or A model) with the same pitch (15 degrees here) the same speed (200 RPM assuming the A model goes that fast), wouldn't the same CFM result?
You could technically make this argument with the 70s/80s Originals, which if I remember correctly were only rated at 7000 CFM. What if I took the four blades from an 80s Original (which had AT LEAST a 15 degree pitch if not 20) and put them on say a year 2000 model, and tested them both? Was the same method used back then as with the 2000 version?
