Do you have tips on all of them? Probably filled with dust and it’s caked in there now
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G'day Notinteresting,
For the nozzle side of things, there are definitely coarser nozzles for sure that you can use that are still PWM. Often they are almost too coarse for most folks, so things are usually sized to be more towards a solid coverage & drift control balance than shifting most of the weight to drift reduction. Like the DR and UR series nozzles stack up to the coarser end of the AI nozzles themselves. They'd be too coarse for many, but you'd know your field conditions and drift sensitivity way better than me, so might just be a matter of fine tuning to your conditions.
Which nozzles/series/sizes were you using right now by the way?
For the 5GPA, 19MPH, looking for Very Coarse or coarser, you'd probably be sorted out with a 110-04 for best size. Were you talking this being the PWM nozzle or non-PWM? Make sure when you are using the Tip Wizard that you are selecting PWM, as if you run the same searches in rate-controlled, it won't show the duty cycle and the flow rates will be a bit off.
So, this would likely be what you'd be looking at. If you were talking ~15-19mph, you'd have means to reduce drift down to very very low levels.
For the duty cycle, generally I'd recommend aiming for a duty cycle between 60-80% at your typical speeds. This means you have a bit of leeway on the upper end, it keeps your duty cycle from getting too low when you are turning or doing headlands, and gives you extra flow capacity out of the nozzle for your turn compensation by section for a bit cleaner corners too.
For fusarium spraying, there is a benefit to having your nozzles spraying front/back. Generally with a coarse nozzle you'd be talking in the realm of like 14-16% better droplet deposition. This is due to the head (or flag-leaf and up) being the only target, so you want the spray to start travelling horizontally across the top of the canopy to hit the front/back of the head. The back nozzle angle is less important (could pretty well be pointed straight down), but the front nozzle is a very effective use in headblight spraying. If i recall, the best study I saw for FHB found there seemed to be a sweet spot around the 10-12MPH (and that was better coverage than slower than the 5MPH trials in lab/field they did for replication.)
Mind you, angled spraying isn't the ideal in most other circumstances, as most other fungicides aren't looking for primarily top-canopy coverage. They (and herbicides) need to be drilled into the canopy and try get coverage in the mid-low canopy all the way down to the stem instead of getting hung up in the top of a dense canopy. If you are doing these higher volume 15GPA+ fungicides into a canopy, then I'd suggest you look at something like you were mentioning before, using the PWM+ non-PWM nozzle on your sprayer. Ideally you have better control of the PWM nozzle, so it is recommended to havelike 50-66% of the total flow rate going through the PWM body. (as you wont have turn comp by section for the non-PWM nozzles). Alternatively, you can use a double-down style adapter (either as a standalone adapter or swap an outlet in your turret) to use two pulsing as well, BUT you will still hit the flow restriction through the solenoid. (e.g. Two -06s on a double down being fed by the solenoid is the same as a -12 nozzle side, so you'd get the pressure loss/flow of a -12,and NOT 2x -06 nozzle flow rates).
This is those adapters that'd lock onto the outlet if you needed part numbers/etc.
So, if you were talking a fusarium headblight application for 15GPA, you might JUST hit the flow restriction through the solenoid. (Pretty much any nozzle through the solenoid will have a soft-cap of around 1.0-1.25 us gpm, unless you had high flow solenoids.) This might mean the solenoids get maxed out and you might need to slow down a tad.
Technically, just to get your flow rate up, you'd likely have to be in the realm of a -12 size nozzle to make it effective for flow rate and duty cycle. A -10 size (equivalent) is just too small as you'd start getting speed restrictive.
This is what the speed/duty cycle chart would look like:
The SR110-06s kind of have the same spray quality (as an example, you'd be spraying at like 60PSI) if you were using two of them. It is an opportunity if you wanted an even coarser nozzle forward and a finer nozzle backward as well, as you are going fast enough that with an angled nozzle you could tolerate a bit coarser spray. (or you can add/change with nozzles you have on hand, as this might be a good opportunity to use one of the nozzles you were finding too fine for your earlier season work -e.g. could do a 110-08 + 110-04, etc. I generally recommend if you are a non-even-split nozzle pair that you put the higher flow forward or alternate fronts/backs).
The dual nozzle charts are from the new Tip Wizard that should be coming out soon. (Android app version is done now, and Apple/WEB versions are just underway for the update). If you have an android phone or tablet, I can post a link to the app file to be installed, as it has a way better layout for dual nozzle selection as there is some technical stuff in the back end that will differ from selecting a single nozzle.
Anyways, hope that gives a bit of an idea. If you wanted to let me know which nozzles you have on hand right now as well, as that might work its way into the equation of setting the spray nozzle/selection in a way that'd work for you.
Hah, Grumpie, generally when I'm working with applicators, generally everything is centered around going the speed they are wanting to go. Pretty much applying the best as possible given their speeds/etc. So, I've worked with guys spraying down to 3MPH and upwards of 27MPH. Definitely a whole lotta variability and situations for sure.
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