Trailed vs Self Propelled Sprayer

@Clive, as far as I can see Guardian Airs are not available in 80 degree format and therefore can't be used at 25cm spacings if lowering boom height down to 30cm. What am I missing?
BFS STS80 nozzles are low drift and are ideal for 25cm spacing
 

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No. I'm saying I just wouldn't suggest any LD nozzle when 25cm spacing, lower boom height, the front curtain, 80deg nozzles all do the same job whilst still allowing a fine spray therefore good coverage of the target.

All air inclusion/LD nozzles end up compromising coverage because of the larger droplet size. When my sprayer was new we did some tests on different nozzles and settled on flat fan 025 80deg alternate forward and down. With a little assistance from my agronomist
Use BFS STS80 low drift nozzles
 

RFR

Member
I read recently , on either here or twittter or FB that someone was using alternate nozzles along the boom of a twin nozzle then a straight down then a twin etc. or did I dream it? did you comment on it @Clive ? Sounded an interesting combo of nozzles just wondered how itt worked on pre ems?
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
I read recently , on either here or twittter or FB that someone was using alternate nozzles along the boom of a twin nozzle then a straight down then a twin etc. or did I dream it? did you comment on it @Clive ? Sounded an interesting combo of nozzles just wondered how itt worked on pre ems?

Can’t recall seeing that
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Bugger! Must have imagined it! Seem to recall part of the discussion was about 25cm spacing too. But maybe reading too many bits and making some up haha

Recent twitter discussion with @Feldspar re 80deg AI nozzles and research that they are better than flat fans

I might change to 80 AI next spring now there are more options
 

Alistair Nelson

Member
Mixed Farmer
Location
E Yorks
Don’t worry you didn’t dream it someone it on here somewhere said about it but I heard Stefan Leeb himself extolling the virtues of it at a presentation when used in conjunction with the 25cm spacing and the precise boom control which makes sense but the only reservation I would have are we over complicating it and is the benefit worth the cost? I don’t know? Your thoughts
 

fudge

Member
Arable Farmer
Location
Lincolnshire.
Recent twitter discussion with @Feldspar re 80deg AI nozzles and research that they are better than flat fans

I might change to 80 AI next spring now there are more options
I'd resist the temptation to change your nozzle configuration everytime someone brings some research out Clive. It won't be five minutes before someone else "proves" that FF/110/triple caps, are best.
 

Wheatonrotty

Member
Mixed Farmer
Location
MK43
Not using twin caps but I have defys alternating forward and back on one line and flat fans on the other for pre ems. Not sure if it makes much difference but it can't hurt.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
I'd resist the temptation to change your nozzle configuration everytime someone brings some research out Clive. It won't be five minutes before someone else "proves" that FF/110/triple caps, are best.

I think there is little doubt that using the machine at 30cm height would be better than 50cm from a drift reduction point of view

What kept us higher at 50cm was lack of good AI options that would do 80deg needed for the lower boom height. I felt any drift advantage gained by the lower boom would be lost by the flat fan

Now it seems we can have low drift from AI and 30cm height

Research I mention says that AI gets better coverage abs results than Flat fan
 

fudge

Member
Arable Farmer
Location
Lincolnshire.
I think there is little doubt that using the machine at 30cm height would be better than 50cm from a drift reduction point of view

What kept us higher at 50cm was lack of good AI options that would do 80deg needed for the lower boom height. I felt any drift advantage gained by the lower boom would be lost by the flat fan

Now it seems we can have low drift from AI and 30cm height

Research I mention says that AI gets better coverage abs results than Flat fan
Lowering the boom and using AI will certainly give you more spray days than my 50cm setting! From the point of view of timeliness that ishould mean you can cover more acres effectively. Expensive system though.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Lowering the boom and using AI will certainly give you more spray days than my 50cm setting! From the point of view of timeliness that ishould mean you can cover more acres effectively. Expensive system though.

already have the ability to run the lower boom height happily so only costs would be the swap to 80deg AI jets

It's no so much about more spray days but less drift on any day and therefore hopefully more effective action from the products applied
 
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Properjob

Member
Location
Cornwall
Use Guardian lilac 025's at 25cm for some herbicides and all ear wash, angled forward backwards alternatively, coverage is excellent at 200l/ha. Though high water volumes for these specific applications no need to go to 80 degrees. True 50cm boom height is good enough, if too windy then shouldn't be spraying at 30 cm.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Use Guardian lilac 025's at 25cm for some herbicides and all ear wash, angled forward backwards alternatively, coverage is excellent at 200l/ha. Though high water volumes for these specific applications no need to go to 80 degrees. True 50cm boom height is good enough, if too windy then shouldn't be spraying at 30 cm.

It’s not about being able to spray on windy days - logic says that less drift = more Chem on the plant even in good conditions surely ?
 

RFR

Member
Don’t worry you didn’t dream it someone it on here somewhere said about it but I heard Stefan Leeb himself extolling the virtues of it at a presentation when used in conjunction with the 25cm spacing and the precise boom control which makes sense but the only reservation I would have are we over complicating it and is the benefit worth the cost? I don’t know? Your thoughts
i was just wondering if on a 50cm spaced boom you could go , twin nozzle with say 30 deg forward backward then put a straight down then a twin etc along the boom. so in theory youd have forward down and backward covered or am i missing something? so like a turbo twinjet AI then a turbo teejet AI alternating
 

Properjob

Member
Location
Cornwall
It’s not about being able to spray on windy days - logic says that less drift = more Chem on the plant even in good conditions surely ?
Sorry what I meant was that true 50cm as achievable all day long on a Horsch is as good as it gets, lowering to 30 cm doesn't achieve much, what does is using finer nozzles at 25cm spacing at 50cm boom height, double coverage.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Sorry what I meant was that true 50cm as achievable all day long on a Horsch is as good as it gets, lowering to 30 cm doesn't achieve much, what does is using finer nozzles at 25cm spacing at 50cm boom height, double coverage.

I agree - we use 25 spacing at 50cm height with AI jets and results are great. A “true” 50cm height that a leab can achieve is different to what some think 50cm looks like !

In theory however they should be even better at 30cm height and 25cm spacing surely ?

The sprayer can do 30cm so can’t think of a reason not to now 80deg AI jets are an option ?
 

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