FredC
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In the meantime could you plot the truckport vacuum performance for us?
Electric Truck Mount
- Thread starter Brody Robert
- Start date
In the meantime could you plot the truckport vacuum performance for us?
encapman
Member
Here's the plot... It produces 200 inches of water-lift. 
We're talking about a portable, not a truckmount. Truckmounts have blowers rated by CFM. Portables are typically rated by inches of water-lift. With a truckmount it's normal to run a hundred plus feet of hose, so CFM is important. With a Porty running a relatively short hose (normally 25-50 feet) water-lift is important.
The new Airwatt vac motors are high efficiency motors that can produce higher water-lift, with less current draw than older style vac motors could provide. There are a few portables that now use the Airwatt motors. These vac motors produce suction that's impressive for any portable user.
We're talking about a portable, not a truckmount. Truckmounts have blowers rated by CFM. Portables are typically rated by inches of water-lift. With a truckmount it's normal to run a hundred plus feet of hose, so CFM is important. With a Porty running a relatively short hose (normally 25-50 feet) water-lift is important.
The new Airwatt vac motors are high efficiency motors that can produce higher water-lift, with less current draw than older style vac motors could provide. There are a few portables that now use the Airwatt motors. These vac motors produce suction that's impressive for any portable user.
Lee Stockwell
FOJL
All blowers have a performance curve with flow in one axis and lift in the other axis.
Cleanworks
Moderator
2-6.6 vacuum motors in series will give you 200 inches plus of sealed vacuum. Open flow it will give you aprox 138 CFM. In parallel it will give you about 130 inches sealed vacuum and 200 plus cfm. Either way, it's a pretty decent machine. You don't want to leave it in the van and call it a truck mount but as a portable it will perform well. Good price too.
Bob Savage
Member
...because CFM and LIFT have an inverse relationship.
FredC
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Well the thread is about electric truckmounts.......Here's the plot... It produces 200 inches of water-lift.
We're talking about a portable, not a truckmount. Truckmounts have blowers rated by CFM. Portables are typically rated by inches of water-lift. With a truckmount it's normal to run a hundred plus feet of hose, so CFM is important. With a Porty running a relatively short hose (normally 25-50 feet) water-lift is important.
The new Airwatt vac motors are high efficiency motors that can produce higher water-lift, with less current draw than older style vac motors could provide. There are a few portables that now use the Airwatt motors. These vac motors produce suction that's impressive for any portable user.
A vacuum performance curve would be helpful in determining the performance one could expect running their porty from the truck.
I know it can be done
You seem like the guy to ask. Ed is too busy pretending he ran an 11 truck resoil empire.........instead of saying he is the manufacturer of the unit in the op (he'll say that is my fault)
Lee Stockwell
FOJL
58 cfm @ 68" water lift for a single blower, using the 3/4" orfice rule of thumb.
Cleanworks
Moderator
Much harder to calculate performance from a truck. You dont have any drop in suction but the longer the hose, the bigger the drop in CFM. The longer the hose, the more CFM you need. You can measure it in time. Put on a certain length of hose, seal it and time how long it takes for the motors to rev up to full capacity. Then add more hose and repeat. You will find the longer the hose, the larger the time lag.
Lee Stockwell
FOJL
In either scenario airflow IN equals airflow out, and the easiest place to measure this is at the exhaust of either blower. Length of hose won't change this, only the "rise time" and "fall time" from maximum vacuum level. The variable is leakage and vacuum relief if used. The resistance of each hose, elbow or tank element will not change the IN = OUT fact, but will increase the power required to maintain it.
Vacuum hoses and waste tanks have measurable capacity, and this form of "capacitance", like a capacitor in an AC circuit can store and release vacuum power to some degree. Thus smaller tanks and shorter hoses have shorter rise/fall times.
The energy required to move air thru the system increases at the square of its increase in speed. This is the main bottleneck in portable systems, the power required just isn't available to compete with a gas engine.
Vacuum hoses and waste tanks have measurable capacity, and this form of "capacitance", like a capacitor in an AC circuit can store and release vacuum power to some degree. Thus smaller tanks and shorter hoses have shorter rise/fall times.
The energy required to move air thru the system increases at the square of its increase in speed. This is the main bottleneck in portable systems, the power required just isn't available to compete with a gas engine.
Why are you guys just carpet cleaners and not Engineers?
Cleanworks
Moderator
Too much like work
Lee Stockwell
FOJL
I enjoy cleaning carpets. My EET studies at MSU convinced me I didn't want to pursue that career.
Old Coastie
Supportive Member
Like some minor thing happens and it begins to cascade. Trust your instincts.
Hack Attack
Member
Sorry to hear, your right you can only play the cards as they are dealt but some hands are harder to play than others.. all the best!
encapman
Member
Here's the configuration curve for the two vac motors in the Truckport.
http://excellent-supply.com/assets/images/Ametek_Lamb_2-Stage_6-6_Airwatt_Configuration.pdf
I'm not a fan of running a portable from the truck. Electric "truckmounts" have their limitations. Running long hose runs off an electric blower will see a fall off in performance. It's easy enough to just roll the machine inside and have it close to the area being serviced.
FredC
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Cleanworks
Moderator
You gonna pay him a call Fred?
FredC
Village Idiot
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Lol....no. I can find idiots locally if I feel the need...........
That came in the mail today. I forgot I requested when looking for why people would go to Arkansas
Lee Stockwell
FOJL
I have to go thru it to get to Texas.
Desk Jockey
Member
Me too. We were in Branson and toured a cave across the state line.
Kenny Hayes
Member
Because I have grandkids and a great grandkid in Arkansas, and I still love them
FredC
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Mikey P
Administrator
Crowley?
FredC
Village Idiot
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I dropped the PM to bump the thread in hopes that he will come back when he is sober and read what I actually said.......
Desk Jockey
Member
lol Well I've been called worse!
Dolly Llama
Number 5
Desk Jockey
Member
My wife told me to kiss her ass this morning. In true Richard form I said "I plan to."and deservedly so, I'm sure....
..L.T.A.
Of course she hit me with "Not with that attitude!"
I gotta be me even though it costs me, some times.
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F
FB7777
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Cause on the internet you can googlewell anything...
in the real world...,these dopes are exactly where they belong
