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NW Iowa | I run both 110 and 80 on a 20" spacing. Depending on which type of nozzle and what i am spraying.
An XR80 nozzle needs 20" of boom Hight.
Hypro air induction 110 needs less.
Edit- I don't believe 110 nozzles were even around in '95 when my rogator was built
https://ag.purdue.edu/department/extension/ppp/resources/ppp-publica...
The key to effective application is to get as close to 100 percent uniformity in volume distribution across the boom as possible. This simply means that whatever is below the nozzles is going to get the same rate and the same combination of droplets. This consistency always improves performance.
Twenty years ago, 80° nozzles were the standard that fan angle choice. The spray pattern for an 80° that fan nozzle, like all that fan nozzles, tends to have large droplets on the outsides of the pattern and small droplets in the center. To get consistency across the pattern, a boom may have an 80° nozzle and a 110° nozzle set up to obtain a minimum of 30 percent overlap with neighboring nozzles (ideally 50 percent). For a 110° nozzle that follows the spacing and height 1:1 ratio, the overlap of neighboring nozzles starts to begin halfway between the nozzles and the target.
As manufacturers began to design nozzles that reduce drift by producing coarser droplets, operators found that a second option for reducing drive was to lower the height of the boom. Getting the boom closer to the target promoted more droplets reaching the canopy.
Lower boom heights also have the advantage of keeping the finer drops from being blown by the wind out of the treatment area. But without sufficient overlap, low booms (or booms that sway low) may create gaps in coverage by reducing the overlap. A 110° angle provides a wider swath by using different orifice designs and can also be achieved by using higher pressures to push the spray outward. For an effective application, a 110° spray angle nozzle would also need a 100 percent overlap to ensure an even distribution of the spray solution. The 100 percent overlap is based on examining the spray pattern of three nozzles along a spray boom. The nozzle in the middle would receive 50 percent overlap from the nozzle on the left and 50 percent overlap from the nozzle on the right (for a total of 100 percent overlap).
The fan angle also affects the boom height. A boom that is too low for an 80° fan angle can create underapplication zones between the nozzles. If the spray pattern for the 80° fan does not have enough distance to fully spread, it will instead place much of the spray in a narrow band.
A 110° angle makes the application more consistent when spraying rolling ground when the boom goes up and down. Moreover, a 110° angle would allow the operator to set the boom closer to the target for a 100 percent overlap. This creates a scenario for mitigating off-target movement of spray droplets.
For these reasons, the 110° angle is preferrable to the 80° angle in many situations. The 110° angle allows more Flexibility in application heights and drift mitigation measures. Nozzles spaced 20 inches apart, the recommendation for an XR 80° nozzle is to be 30 inches from the target. On the other hand, the recommendation for an XR 110° nozzle is just 20 inches from the target. But, as in most things, we may be circling back. With the rise of selective spraying, a more targeted application has a value. Nozzle manufacturers are exploring the utility of 80° That fans (or even more narrow fans) on closer boom spacing to more accurately target small weeds with little product waste.
Edited by Massey1155 1/21/2025 12:54
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80 foot Boom 20 inch spacing 48 Nozzles.
