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Interstate Aircraft became Interstate Engineering at the conclusion of WWII. They were one in the same and the early vacuums like my Model 1 came out of the same El Segundo factory that was making aircraft, UAVs and various aircraft components for the war effort. With aircraft demand falling...

I could only find this description from Tristar but it is not very descriptive. I have a demo kit stashed away that includes a clear lid that lets you see the cyclone in action, but it is buried right now while we build a new garage out back. The air comes in the top of a Tristar style...

Did the plastic break? Are you sure you didn't create a stress crack removing the bearing and that is what failed?

None of us can afford the labs and test equipment used by the likes of Intertek so any testing we do it casual at best and our results anecdotal. None of us can afford to buy three to five examples of each kind of vacuum we might want to test to perform the tests according to the international...

I said nearly as much at the very beginning of this thread and was savaged by vacuum fiction for my audacity to contradict His Highness. i was referencing some of the old lightweights from Hoover, Regina, Lewyt, Electrolux and even some vintage Vorwerks and Mieles. A tiny vacuum body like a...

You are just a troll. Go away! Compact is an original, designed at the request of Howard Hughes for use in his aircraft, specifically TWA which he owned back then ( Howard Hughes built TWA from a tiny nothing to a global giant, then weirded out on drugs in his old age and was booted by the TWA...

A full frontal display of ignorance. Maybe spend more time reading before spouting. There are people on this board who have worked in the vacuum industry probably before your parents were born. They have a lot of great information to pass along. Rainbow is one of the oldest surviving...

Compact, which later became Tristar, had cyclonic action back in the 1940s. It is how they maintain airflow as the bag fills up. Air comes into the bag chamber at the top and makes a big rotation that leaves the dirt piled up in the front of the bag chamber ( inside a disposable bag that in...

Rainbow vacuums are nobody's "knock off". Do you even know what one is? They have been around more years than you or I or His Unholy Excremence Lord Diesoon have been alive. All those other water filtration vacuums are knock offs of Rainbow. Rainbow vacuums and the idea behind them is very...

So, you claim to champion "actual testing" rather than theory I just retired from a career in the weapons development world. Theory is all fine and dandy but until you test you really know nothing. I have seen what on paper looked like fabulous designs with all kinds of eye watering physics...

Electronically commutated motor with ceramic bearings. Might outlive the rest of the vacuum.

US DoE testing show large gains in efficiency over commutated and slip ring motors, and the gains are largest for AC motors. AC motors use a lot of power just to generate the magnetic fields that make them spin. That is reduced for an electronically commutated motor because the armature is a...

The steel baseplate seals is flat inside but fits tight to the underside of the upper housing.

This is the air path on an Electrolux Ze3. Despite the wimpy little brush roll and complete lack of wheels it is one of my better power nozzles. There is space between the bottom plate and drive motor housing for air to flow and as a result it cleans really well, but you can only use it on...

Nozzle design is more complex than just the size of the opening. Miele and Wessel-Werk power nozzles have openings that are very close to the rotating brush and in my home they clean miserably. Kenmore and Sebo power nozzles used with the same vacuums both do a better job and the Kenmore...

No different working in any aspect of the transportation and warehousing industries. I spent too many years in both working for crooks who became enraged when you wouldn't knowingly break laws of cheat customers so the boss could make a pile of money. I can honestly say that off the dozens of...

I'd be afraid of a nut backing out even with a lock washer. A rivet won't budge. At the very least then use some blue Locktite.

Guess I can exhale now : )

Don't feel comfortable installing new rivets?

I'd be afraid the heat from the cutting tool ( a Dremel ??? ) would melt the plastic. It's one thing to warm the plastic up with hot water to get it to expand and release the race a bit but the heat a cutting tool generates is a whole lot more and more than enough to melt the plastic and ruin...