טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentStein-Peri Rony
SubjectDesign Upgrading of Gun's Handle as Factor of Accuracy and
Comfort during Performing a Mission among
Soldiers
DepartmentDepartment of Architecture and Town Planning
Supervisors Dr. Yair Lifshitz
Professor Ron Nabarro
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract


     This research examined the effect of an ergonomic-based design upgrade of the Negev handle machine-gun on the use of the handle in terms of comfort and efficiency.

     This study was carried out in an infantry battalion. The sample group was divided into two groups: 1. the control group ­- 24 participants who used the current handle, 2. the test group - 25 participants who used the new handle. Both groups carried out target practice (accuracy index) and filled out questionnaires (comfort index).

     The main purpose of the new design of the handle was to improve accuracy and comfort. The significance of this research was the ability to present a way to improve accuracy and comfort by using a new ergonomic design handle.

     The study demonstrated that in terms of comfort and accuracy, the test group (with the new ergonomically designed handle) produced better results than the control group (with the existing handle).

     The shooting data indicate a 4% improvement in the test group, whereas the control group indicates a 12% decrease in performance. In the test group there was a 20% improvement in the feeling of comfort resulting from use of the ergonomically-designed handle, whereas the control group showed no change in this factor.

     The contribution of this research is that it provides the initial foundations for the creation of a model designated specifically for gun handle design, which may be applied, in parallel to the model currently used for tool handle design.     

     This research revealed the importance of carrying out trials in field conditions, to examine the effect of the handle design on the participants as they performed their tasks in a natural environment. Additionally, running field trials brought elements to the researcher's attention that otherwise might have not been looked into in a laboratory setting. For example, the effect of the sweat on the grip and the stability of the new handle.