"Perfection" is a goal rarely achieved
the swivel speed was referring to the nozzle-angle change.
and about the spray angle..
the closer you get to a 0 degree spray, the more likely you will have
perfemant abrasion lines in the swirl-marks in the concrete.
I look at it this way..
1) abrasions in the concrete is a liability problem.
wider is better to NOT have any of those complaints.
2) wider spray angle means you can go faster.
..as long as you have plenty of flow and pressure.
3) overlapping rotor paths means double-cleaning in a small ares..
..AKA..more lines left behind.
Now. Because most of my products were born at the servce counter..
I aim to have NO warranty issues..
perfection is my goal, on every level, as I want happy customers, and ALL the referrals.
..just like you, in yiour business.
Perfection is the goal, so here's the mix on the 40" surface cleaner..
I can NEVER suggest form even a moment a zero degree nozzle is a good idea.
If we have to go to 7gpm for every 20" of surface cleaner to "go fast".. so be it.
If we can "get AWAY WITH a 15 degree nozzle for better cleaning,
..on the jobs that justify a slower pace for better cleaning, .. so be it.
Changing to 25 degr. nozzles for the "production-style rinse-off".. fine.
Trying to convince all of you 4000psi minimum should be used on ALL large surface cleaners on outdoor concrete.. some will swallow it, others will whine about "why it won't work better" for quality-of-clean.
The cleaner you want to achieve, the more pressure and temperature you'd better be committed to.
..and I don't mean steam at 275+..
I mean 220 to 230 degrees is better than thiose wimpy 180 degree systems that those bean-counters ware selling.
I am building dual-heater dual-pump sysrtems for over 8gpm and getting GREAT results with multiple wands.. NO fussing.
I really want this 40" unit to be considered asperfect as perfect can be,
...all matters considered, like my 21" version.. it is WAY better in actual work-speed-efficiency than ANYthingelse out there.. because I tried THAT hard to deliver.
you should ALL own at least one, or you are wasting time and profitability..
you can run 2 of them with a 350cfm vacuum (16hp).
the 40" is only going to have 1 difficulty.. sucking up water on UNEVEN surfaces.
BUT.. you will be able to go real fast, on that mower,
relative to how big a system you back it up with..
I'm projecting for 100 linear feet per minute..
12 to 14gpm at 4000psi (or 4500psi for over 200 feet),
650cfm vac at 35hp (or 40hp for over 200 feet).
I HOPE it does that well with a 2"vac hose, but you might haveto go to 2 1/2"
..IF you are determined to go "that" fast.
Now don't be surprized.. I don't have convenient 12 to 14gpm "sitting around"
selling totally custom systems at very close to "mass-production" prices
does not pay very well..
If you guys will muster the faith to buy a deck,
put it in a mower, (and yes, I will talk you through that,)
and test it with "all you have"..
Jim, you have a monster.. hook it up, and together, we'll adjust it for all it can do.
the rest of you will achieve something less, BUT..
50 feet per minute is still 10,000 sq.ft. per hour, at 2cents sq. = $200. per hour
with just 1 man.
Belly up !
I've made it work, you tune it to your system..
it's done.