Boomless nozzles are becoming more popular than boommounted nozzles because they cover more ground with fewer passes and are less prone to damage during range and forest spraying. The spray coverage and droplet consistency of boomless nozzles are typically not as uniform as nozzles mounted on booms. Improvements in boomless nozzle technology, such as in the Boominator 1400FM, produce decent spray patterns and droplet sizes at pressures between 20 and 40 pounds per square inch (figure 8). The nozzle was mounted at a 45-degree angle to the ground to help keep the spray off the ATV and the applicator.

The Turbo TeeJet TT11002 boom fan nozzles from Spraying Systems (figure 9) are rated for a wide range of pressures (15 to 60 pounds per square inch), have a 110-degree spray angle, and are designed to reduce drift. During testing, the boom was configured with five nozzles that sprayed a 100-inch swath.

Figure 8—The Boominator 1400FM boomless nozzle
created a relatively consistent droplet pattern over
a 20- to 22-foot swath.

Figure 9—Boom-type nozzles produce uniform spray patterns over a wide
range of pressures. Booms aren't always suitable for rough terrain and
brush in many range and forest settings.