More airflow tests.

[panasonicvac]

I've seen a video of that Ultra MVP comparing against the Royal Everlast 8300 in the airflow "Pipe" test and it surprisingly beat the Royal. I've only seen these a few times and I only turned one on once but I've never really used it. But honestly though, I would've bought any plastic by-pass upright back in the 90's, I would've bought one of these. I think these are probably no doubt the best Dirt Devil they've ever made and I also think it's perhaps the best by-pass upright that was ever made. Although I honestly think the Simplicity 7350 back then was impossible to beat.

 

[mike811]

I wonder how on earth the Dirt Devil Ultra MVP is usable with so crazy cfm. My Vorwerk with 85-90 nozzle cfm is extremely hard to push. For normal use I need to keep the nozzle air release valves open or set motor speed to middle. Otherwise it's almost unusable.

 

[blackheart]

Ultra MVP

One of the problems with this machine is the brushroll motor is pretty wimpy and the brushroll will stall due to the machine sealing to the carpeting. I can use it alright on my carpet as long as the height adjustment is set at least to the middle but i've noticed i still get vibration from it on the 2nd highest setting. Rugs are kind of difficult to clean as it tends to clamp onto them.

It is odd that they'd be able to snatch a pipe away from an everlast I've not measured one yet, but I don't think it has more flow than one, but i think it has something to do with the nozzle configurations since the airflow path on the mvp is located at the rear of the nozzle facing foreward at base>? height it's most likely directing it's flow towards the front. I've always felt like Kirbys (and therefore royals) distribute it's flow around the perimeter of the nozzle due to the air path being higher (airflow hits the inside of the nozzle and is spread out more) I could be wrong though it's just an idea.

Other members have told me that I need to get my hands on a Royal Powecast. They too had a short and wide airpath.

 

[mike811]

So finally I got it. GM8901 Anemometer
This is my first test.
I hope I got it right?

Sorry about the sound quality.

 

[mike811]

Kirby G6 got 121 cfm from the nozzle.

 

[blackheart]

Ah!

Very good Mike! I look forward to seeing your measurements!

 

[vaclab]

Fantastic Results With Staggeringly Similar

Airflow measurements from 4300 miles away from Ohio. I get about 120 CFM from my G6. Can't wait to see more tests.

Bill

 

[mike811]

Can this actually be 134 cfm.
Did I do something wrong?

http://https//youtu.be/UYt4tCr2al8

 

[vaclab]

Fabulous results! Does it have a hose?

How much power does it draw? Seems like a reasonable result. It appears to be in the same general class (120+ CFM) as the SEBO D4, Tristar CXL, Filter Queen M360 and Henry HVR200.

Of course a "hot rodded" Electrolux Marquis with a 12 Amp (1440 Watt) motor is the highest base canister CFM I've seen so far.

As always, repeat the measurement a few times to make sure you get a consistent result.

Bill

 

[mike811]

Now from the hose and after all the testings it got max 97 cfm.
Motor draws more than it should be (1000 watts) I measured over 1200 watts.

 

[blackheart]

Interesting.

134 base cfm that's great! When testing hose cfm the hose should be held as straight as possible to get it's maximum flow. How long is the hose on that machine?

 

[mike811]

Base of the vacuum reading was high indeed, but I had the hose tangled up, not straight at all. I am expecting over 100 cfm from the hose end. I should also clean the reusable bag in this Philips.
What was interesting that this should have 1000 watt motor. However It constantly draw nearly 1200 watts. It sounds original 2-stage motor, so I don't think that it has been replaced. Hose is 1.8 meter (5.9 feet) long.

 

[blackheart]

Royal 10 amp

There's a Hoover type A bag in this currently so i'm not convinced that it's functioning at it's peak but just out of curiosity I ran this test just to get a ballpark for it's flow. I was hoping for 150 CFM.

 

[lesinutah]

Blackheart

Hey
Wow that does look good polished up. I got the royal from my work(Walgreens).
They thought vacuum had shake out bag. I acquired it and the nozzle and vacuum bag was full and couldn't see tube. I blew everything out and out fell a fill tube. I washed bag and patched hole in bag. I recently upgraded sanitaire to type a bag and that is where the bag came from. It was closest fit. I have royal b bags i found.
Maybe if you take off baseplate it might increase airflow. The right bag would help too.
I thought it had more airflow than sentria. The g6 is basically the same and the test show it indeed has more power.
I have a royal backpack vacuum ry4001 that has 8.5 amps. I thought it was 10 or 12 amp but website says 8.5. If I were guess id say it has 105 at hose.
I will. Have to get some tools and do some tests.
Glad to see the royal.
Les

 

[blackheart]

Royal 1030 2nd test

I didn't want to wait for proper B hepa bags so i picked up some Royal L bags (similar in size to Hoover A) and got them to fit. So re-doing this and getting nozzle measurements this is the highest density I've seen off any machine with a brushroll.

 

[blackheart]

Kirby and Royal

Yes the Royal beats out a Sentria in terms of pure flow, Bill has measured in 127 cfm for his sentria II and that's about what I got measuring an Avalir, As well as CFM Density. But Strangely my old Legend II narrowly beats it in flow (but not density) at 142.67.

This got me thinking the royal should have the advantage. It not only uses a higher wattage motor but i've heard their fans are deeper than Kirbys. Kirby is also running it's transmission off it's motor on current models. So why is it that the Royal doesn't vastly surpass Kirby? It's the airpath!

A royal's airpath is narrower the bag tube tapers towards the base, has deep groves and i've always felt that a square or rectangular airpath negatively effects airflow.

A Kirby's airpath is both wider and smoother There's a small different at the "bag horn" but the major difference is in the filltube it has a larger area to it and while it has groves all the way along it they are much less pronounced than the Royal's

 

[lesinutah]

Hey

Very good analysis. It makes sense.

 

[vaclab]

Hey Devin, I Think You Meant

To say that the Sentria 1 gets 127 CFM and the Sentria 2/Avalir gets 137 CFM.

And that's with only a 7 Amp motor instead of a Royal's 10 Amp motor.

Bill

 

[vaclab]

Forgot to mention that

Your Heritage II is stuck running on high speed, which is really just meant for a hose attachment. In low speed, it'll measure right around 120 nozzle CFM.

Bill

 

[lesinutah]

Bill

Amps
The royal has more amps but kirby has more weight 32 to 20. The royal has a half inch bigger fan as well as. 1825 in bigger depth. Metal fan outweighs amodel fan. The kirby has a transmission im not sure that helps with power. The kirby vacuum seals around the rug nozzle alot better royal because nozzle is alot closer to the ground. The kirby has a belt lifter sealing the nozzle the royal has rubber cap bound to lose air. The emptor provides less resistance for airflow. The emptor connector kirby has is alot tighter in kirby.
The kirby design is more effecient moving air. That is how it makes uo for less amps. The heritage weighs 24lbs. The royal is under 20.
I was wondering if altitude would affect the motors. Oxygen level is lower in higher elevations. It affects humans cars etc. Vacuum a and b would have similar differences no matter altitude but it. Makes you wonder if sea levl compared to 5000 ft. How much power is lost.
Just a few random thoughts.
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