- Author
-
Forest Service
- Title
- Nitrogen-Pressurized Spray System for C-47 Airplanes.
- Coporate
- Forest Service, Missoula, MT
- Report
-
Test Report 3400/5200-1,
December 1972,
17 p.
- Keywords
-
sprays
|
nitrogen
|
forestry
|
spraying
- Abstract
- A nitrogen-pressurized spray system for applying insecticides from C-47 airplanes has been developed. The system is operated by using gaseous nitrogen to expel from the spray tank either (1) a conventional insecticide solution which emerges with a droplet spectrum having a mass median diameter (mmd) of 120 microns; or (2) a solution 50 percent insecticide and 50 percent Freon 12, which emerges with a droplet spectrum having a mmd of 60 microns. The system has performed satisfactorily on three pilot tests using Zectran for controlling spruce budworm in Montana and Idaho. Advnatages over systems that utilize pumps to expel the insecticide are simplicity, reliability, ease of installtion, and reduced danger of leaks and fire. Construction drawings may be obtained from the Missoula Equipment Development Center.