Thread Number: 34126  /  Tag: Recent Vacuum Cleaners from past 20 years
Airflow Losses for Kirby G6
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Post# 369747   4/1/2017 at 18:19 (542 days old) by wyaple (Pickerington, OH)        

wyaple's profile picture
The first measurement was easy to get, the last one (CFM at the nozzle) required me to build an airflow box. I think this pic should easily illustrate where and by how much CFM is lost in this machine. I think this is excellent performance from a 16 year old cleaner, admittedly with a new fan installed.

From the base of the machine to the nozzle, there is a loss of 159-120 = 39 CFM. This represents about a 25% loss from the direct air motor. Of course as the bag fills, the airflow will drop as well.

Last note: the rug plate opening is fairly large (about 34 square inches) and the CFM density is well above average, about 3.5 CFM/Sq. In. If you ever wondered if this aging beast was still capable of deep cleaning, it certainly is.

I'm actually posting this specifically for Mikko (Mike811), as he has questions about airflow losses when creating his bag less conversion for his G6.


Post# 369777 , Reply# 1   4/2/2017 at 06:10 (541 days old) by Mike811 (Finland)        

mike811's profile picture
This is a eye opener. I always thought that Kirby has 120 cfm from the motor.
This is kind of sad, because my bagless conversion seemed to work very well. Now I don't know if I make the final version.


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