Robin
You know what they say "There are lies, damn lies and CFM figures"!!! and it would take more than a dozen vac motors to match the performance of either of the below machines, I ran a portable for 8 years so im not knocking them, but there simply is no comparison in performance, if you consider a 3 stage vac to be about 1.5 horsepower then you need 13 to match a 20hp truckmount. No offence intended, just real world facts.
"An electric TM like the escape provides as much power as a Sapphire 370ss and as much power as a Prochem Legend gt yet runs on electricity rather than petrol".
Alan
Robin can answer this ... but hey , im still up
The problem with your " need 13 1.5HP motors to match a 20HP engine driven PD blower is ...
you are not comparing like with like ... you are asuming efficiency is the same in both cases .
The PD blowers are a very different designs and there are multiple electric motors ...
not sure how u can equate efficiency in terms of HP .
You ran a portable in either parallel ... or u ran one in series ... which ever one u had it lacked either Lift or CFM as it was a two motor design .
The four motor design we are talking about here is in both series and parallel so you get the high lift and the high airflow which brings the figures closer to the typical petrol driven blowers specs .
From reading what those that have owned both the Mytee escape and 18-20HP TM said, there is not a whole lot in it up to about 100ft ... after 100ft the electric design looses more that the PD blower .
Also .. advances in electric motors ... the portable u ran probably had two 450 airwatt motors ... some recent motors produce up to 680 airwatts .