Why not increase your forward speed to 12k? It’s crazy buying a whole set of nozzles for such a minor change. TBH I would be astounded if you didn’t do a decent job at 2 bar 150lt/ha at T1.Spraying cereals, currently on red (04) flat fans. Wanting to reduce water volume to around 145-150, at 11k that would mean 2 bar or just over. Should that be ok or is it too low for some things - ie get a set of blue nozzles instead?
think I'll do that, thanks for the replies.I'd go down a size to blues or what ever suits your rate and speed and will be working at about 3 bar.
Yeah certainly could do, although I often find 11k plenty fast enough on a few of our steep/awkward bits. At what speed does efficacy start dropping off - don't they say about vortices behind the boom at higher speeds? (I know we're only talking +1k so guess it doesn't make much odds?)Why not increase your forward speed to 12k? It’s crazy buying a whole set of nozzles for such a minor change. TBH I would be astounded if you didn’t do a decent job at 2 bar 150lt/ha at T1.
I use both and find bubble jets very effective at reducing drift. Would use bubble jets 90% of the time. If your nozzle holders can take several nozzles it doesn't take long to swap over.think I'll do that, thanks for the replies.
Yeah certainly could do, although I often find 11k plenty fast enough on a few of our steep/awkward bits. At what speed does efficacy start dropping off - don't they say about vortices behind the boom at higher speeds? (I know we're only talking +1k so guess it doesn't make much odds?)
On a similar subject, as I said I do everything with flat fans at present. Don't have a big area to spray so I can afford to be fairly picky with conditions (though in a reasonably windy area) - but wondering whether it would be worth having a set of air induction nozzles to switch over to just in case. How much more wind will they cope with?
Agree, 3bar seems to be there sweet spot, I'll alter my water rate a bit if I want to go at a different speed to keep the pressure about right. I will go up to 4bar and down to 2.3ish. they seem to be streaky at 2 and below but efficiency still seems good when running at that around headland for lerap 3 star.GA are the best IMO if just want one nozzle. I have 04 for pre em etc and 03 for everything else……try to run around 3 bar
What sprayer do you have at new place?Most of the LERAP 3* drift reducing nozzles only have that rating at 2 bar. I wouldn't want to go much lower than that & personally, I prefer to run a smaller nozzle at 3 bar most of the time so at least I have the option to slow down on headlands if it's a bit rough or breezy.
Nozzle choice depends on what you are trying to hit and how your product works. Small target = higher volume and/or a finer spray. Large target = you can get away with a more coarse spray that gives you the widest window of opportunity to work. Contact only product = fine spray. Systemic/translocated product = ok to be more coarse.
A flat fan is the best for most jobs but is the most drift prone. I use a air indiction nozzle for most work that puts out a finer spray quality than the really coarse "contractor nozzles" designed for getting through a big workload when the conditions aren't ideal. Bubblejets and Guardian Airs are at the finer end of the scale.
Nozzle guide chart
A Bateman RB35 and a JD 740i trailed. Both 24m and a few years old each. The Bateman has single nozzle holders but the JD has 4 nozzle ends. Both currently running 035 Guardian Airs at 140 litres/ha for most jobs at this time of year. 3D Defy angled nozzles in the autumn & early spring. I manipulate water volumes if I need a finer spray. Lots of spread out blocks of cropping on 12 units means little gain from lowering water volumes to 100 l/ha as each block is 1 or 2 loads anyway.What sprayer do you have at new place?