A Wind-Tunnel Assessment of Parameters That May Impact Spray Drift during UAV Pesticide Application
, Jeff Perine 1, Farah Abi-Akar 2, Timothy Lane 3, Brenna Kent 2, Christopher Mohler 3, Chris Scott 3 and Amy Ritter 2Round 1
Reviewer 1 Report
When using plant protection products, unmanned aerial vehicles are increasingly used. Research on the impact of technical and technological parameters as well as weather conditions during the use of unmanned aerial vehicles is very valuable. The research conducted by the authors is equally valuable, but a few information should be completed before publishing the article.
Comment 1
The introduction presents general information on unmanned aerial vehicles, taking into account the legal basis. In my opinion, there is no information on the impact of selected technical and technological factors on the spraying process with unmanned aerial vehicles.
Comment 2
In the section on materials and method, please indicate the method by which the drop size classification was made. This chapter also lacks the flight speed of the UAV.
Comment 3
Air temperature and air humidity are important factors during spraying. The tests carried out in laboratory conditions are characterized by repeatability, thanks to the lack of the influence of external factors. Please justify the wide range of temperature and humidity during research.
Comment 4
The data presented in table 3 and descriptions on the figures 6 and 7 should be presented as numbers in the decimal system.
Comment 5
Consider the difference in airflow velocity in the wind tunnel when using UAVs. I think it is worth adding the results of the airflow velocity without the UAV running. In the materials and methods chapter, I would add information on the method of achieving homogeneity of the air flow stream.
Comment 6
Authors should discuss the results and how they can be interpreted in perspective of previous studies.
Author Response
We thank you for the careful and constructive comments and suggestions for improvement. Our responses are detailed in the attached.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments for author File: Comments.pdf
Author Response
We thank you for the thoughtful comments and suggestions for improvement. Our responses are included in the attached.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
The authors took into account the reviewer's suggestions.I accept the authors' explanations. I have no more comments.
