Ok. I don't know what they used to be like but they are well respected around here now and look well made. Are you going to Cereals to have a look at potential machines?
@Clive if thinking of a 36m setup what tank size are you thinking of?
What do you mean on the same machine if so using BFS dribble bars nothing between each oneHow much variation is there from one liquid fert nozzle to the next? Are we talking 5% or more / less?
What do you mean on the same machine if so using BFS dribble bars nothing between each one
Yup, from one nozzle / bar to the next down the boom.
That isn't how gases and liquids flow?
If you have 30 metres of water pipe and drill 10 identical size holes along the length, stop the end up and pump water in at 3 bar then the flow rate will be the same out of each hole after the first couple of seconds.
Like wise a huge extractor fan at the end of shed will draw an equal amount of air through 10 equally sized inlets.
Because nozzles wear at different rates? They all give the same flow out of the packet.
I remember someone on here who had tested a lot (or was it one of the spray operator of the year people - can't remember) of new nozzles. They said they vary a lot more than you might think.
That wouldnt be due to inconsistency in manufacturing of the nozzles though? Personally each time I swap the nozzles and jug test there's nothing in it. If I jug test just before changing then there would be 5-10% variation i'd imagine.
That isn't how gases and liquids flow?
If you have 30 metres of water pipe and drill 10 identical size holes along the length, stop the end up and pump water in at 3 bar then the flow rate will be the same out of each hole after the first couple of seconds.
Like wise a huge extractor fan at the end of shed will draw an equal amount of air through 10 equally sized inlets.
No.
The Darcy- Weisbach equation relates to pressure drop due to friction along a given length of pipe.
The pressure at the nozzle nearest the inlet will be greater than the one furthest away. Larger pipes mean less friction=less pressure drop though but it will happen on any pipe
No they don't, I know that for a factBecause nozzles wear at different rates? They all give the same flow out of the packet.
There can be 5-10% difference on SOME new nozzles, jug testing a must, you might be surprisedThat wouldnt be due to inconsistency in manufacturing of the nozzles though? Personally each time I swap the nozzles and jug test there's nothing in it. If I jug test just before changing then there would be 5-10% variation i'd imagine.
There can be 5-10% difference on SOME new nozzles, jug testing a must, you might be surprised
YepBut thats down to inconsistency of manufacture? I.e. if you swap the position of the dodgy nozzle on the spray line then it still outputs the wrong amount in its new position.