Recent content by dough

BLDC Brush-Less DC motor I hope that it is a BLDC to maintain Airpower with minimum noise and minimum electrical power watts.

ASTM documents on ScribD Many ASTM International (previously American Society for Testing and Materials) documents are on ScribD. https://www.scribd.com/ $10 / month https://www.scribd.com/

Vacuum cleaner physics No vacuum cleaner can exceed Airpower=volume flowrate at 373 m/s X absolute vacuum. Therefor the smallest orifice is the limiting parameter, and the the smallest effective orifice. The hose diameter is the smallest orifice and as the hose gets longer the effective...

Dirt Meter arrived. Early today I did my normal weekly vacuuming of all surfaces not covered by something too inconvenient to move. The Tech Drive power assistance made a significant difference. This afternoon the Dirt Meter arrived with 100 filter papers. Now I have to think up a standard...

“They, meaning Kirby are good at suction and aggitation, but their extremely loud and unbarable as well as heavy” I am a big person and regard housework as light exercise and good for me, lugging stuff upstairs and down. Be careful of complaining of loudness as the UN-ECE has just tightened...

I purchased a Kirby Avalir2 system. I had decided on the purchase and cost before I offered. I had studied the owners manual and various videos before. I tolerated the three hour pitch. I was impressed by the Dirt Meter demonstration. I was trained in cleaning radioactive spills, wet and...