Design and Experimental Study of a Curved Contact Quadrupole Railgun
Round 1
Reviewer 1 Report
The following changes should be done before the consideration of this paper:
1- Study abstract is very poor, need to rewrite to make it more constructive.
2- Introduction part is short, need to expand by citing more topic related literature. Further, clearly demonstrate the major purpose of this study at the last paragraph of the introduction that whats novel in it and how it is going to contribute in the existing literature.
3- In the Model Description need to recheck the all equations. Lines 257-268 needs proper citations.
4- In the Discussion of Test Results, needs to extend this part by comparing findings with previous published studies.
5- The conclusion part is very short, need to expand.
6- Need to add study limitations and future research directions.
7- The quality of language should be improve by taking help from the English native speaker.
Author Response
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Author Response File: 
Author Response.pdf
Reviewer 2 Report
The current paper investigated a hyperbolic augmented quadrupole railgun in a magnetic field environment mathematically and experimentally and considered the contact problem during the launching operation. After answering my comments and madding the following modifications, I can make a decision:
1- The main novelties of it are not clear to readers and reviewers. Authors are encouraged to add more comments on the novelties and main contributions of the present paper in the abstract section and the last paragraph of the introduction section.
2- What can we learn from the presented manuscript? What is the difference between the current work against other published articles? Also, the authors are suggested to provide some technical expressions on needing the new finding.
3- The introduction section is very briefly organized. Authors are invited to revise the introduction section by detailed reviewing some related works such as: doi.org/10.1016/j.measurement.2021.110527. doi.org/10.1007/s12555-021-0096-y. doi.org/10.1016/j.compstruc.2021.106639.
4- What are the limitations, assumptions, and advantages of the proposed materials and model used in this paper?
5- The discussion is not informative and is very briefly organized. It should be enriched by adding more important conclusions and scientific interpretations. An extended result and discussion are needed. Also, the main results should be summarized in the conclusion section.
6- The section numbers need correction. Some more information on Eqs. 1 and 6 is needed.
7- The writing of this paper needs to be improved and polished. Some typo-grammatical mistakes are seen in the passage
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
This study analyzes the effect of armature-rail structure on the performance of the railgun based on FEM-BEM simulation. the impact of three types of armature rail fits on the contact efficiency of the railgun were compared. Furthermore, a hyperbolic augmented quadrupole railgun was designed according to the simulation. The launch test results were consistent with the simulation findings. This research is exciting and valuable for the design of railgun structures. For the conclusion section, it is suggested to add the specific important results to enhance the importance of this study.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Quality has been improved.
Reviewer 2 Report
All the requested modifications have been made. The article is acceptable as it is and can be published in its current form.
