In the 1950’s, Singer came out with their sleek revolutionary upright that offered a sideways-positioned motor with a fan on each side. This “twin-fan” upright design survived well into the 1970’s in the form of upright vacuums branded as Singer, Kenmore, Lewyt and Sunbeam. But these uprights never seemed to top Consumer Reports ratings for deep carpet cleaning….they were always outperformed by competitors’ uprights created by Eureka, Hoover and Panasonic.
Which brings me to a bit of a science question maybe someone could answer: is it possible that having two fans each creating a suction pull on each side of the brush chamber is actually counter-productive? In other words: is it possible that this design actually creates less effective air flow in the brush roll chamber because each fan is trying to pull air away from the other fan - thereby negating the suction pull on each side?
Thoughts?
Which brings me to a bit of a science question maybe someone could answer: is it possible that having two fans each creating a suction pull on each side of the brush chamber is actually counter-productive? In other words: is it possible that this design actually creates less effective air flow in the brush roll chamber because each fan is trying to pull air away from the other fan - thereby negating the suction pull on each side?
Thoughts?
