## 3 Results and Discussion  
The results of the field performance tests conducted for the first PHAWC prototype are as shown in Table 3. The average harvest efficiency is shown to be 75.8% for AR Legend and 85.6% for Jeokyoung. It shows an average successfully harvested rate of about 64% and an average pepper with twig rate of about 17% to 18% for the two species. It shows average pepper left on plant rates of 5.7% to 11.0% and average ground fall loss rates of 12.3% to 16.9%, while no damage occurred at the helix rotation speed of 500 rpm in the case of the first PHAWC prototype. The results of the field performance test conducted for the second PHAWC prototype are shown in Table 3. The result shows average harvest efficiency of 78.0% to 95.3%, average successfully harvested rates of 45.6% to 70.1%, average pepper with twig rates of 21.4% to 44.3%, average pepper left on plant rates of 1.2% to 8.9%, average ground fall loss rates of 3.5% to 13.0%, and average damage rate of 0.7% to 2.3%. When the helix rotation speed of the second PHAWC prototype increased from 510 to 730 rpm, the harvest efficiencies of both species increased, and the pepper left on plant rates and the ground fall loss rates decreased. In the case of the AR Legend, though the pepper with twig rate gradually increased (from 31.2% to 44.3%) as the helix rotation speed of the second PHAWC prototype increased (from 510 to 730 rpm), the successfully harvested rate did not appear to depend on the helix rotation speed. In the case of the Jeokyoung, though the successfully harvested rate gradually increased (from 64% to 70.1%) as the helix rotation speed of the second PHAWC prototype increased (from 510 to 730 rpm), the pepper with twig rate did not appear to depend on the helix rotation speed. The Jeokyoung is thought to be a species most suitable for mechanization because its average harvest efficiency is higher, and the average pepper left on plant rate and the average ground fall loss rate are lower than those of the AR Legend when comparing the two species using the first and second PHAWC prototypes. With the AR Legend, the average harvest efficiency of the second PHAWC prototype was greater than that of the first PHAWC prototype by a minimum of 2.2% (510 rpm) and a of maximum 15.9% (730 rpm), and the average successfully harvested rate of first PHAWC prototype was greater by about 18% (510, 610, 730 rpm) for the second PHAWC prototype. The average pepper with twig rate was better for the second PHAWC prototype by a minimum of 13.2% (510 rpm) and a maximum of 26.3% (730 rpm), while the average pepper left on plant rate was lower for the second PHAWC prototype by a minimum of 2.1% (510 rpm) and a maximum of 9.1% (730 rpm). The average ground fall loss rate was lower for the second PHAWC prototype by a minimum of 3.9% (510 rpm) and a maximum of 10.6% (730 rpm). With the Jeokyoung, the average harvest efficiency of the second PHAWC prototype was better than the first PHAWC prototype by a minimum of 5.2% (510 rpm) and a maximum of 13.3% (730 rpm), and the average pepper with twig rate for the second PHAWC prototype was better by a minimum of 4.1% (510 rpm) and a maximum of 10.9% (610 rpm). The average ground fall loss rate for the second PHAWC prototype was lower by 8.8% at all helix rotation speeds (510 to 730 rpm). It can be seen that the performance of the second PHAWC prototype is improved in comparison to the first PHAWC prototype as the harvest efficiency, which is the most important factor in harvesting work, increased, and the pepper left on plant rate and the ground fall loss rate decreased; however, with the second prototype, additional work is required to separate fruits attached to twigs because its pepper with twig rate is greater than the first PHAWC prototype. Accordingly, additional study is required to reduce the pepper with twig rate of the second PHAWC prototype. With the Jeokyoung, the average harvest efficiency of the second PHAWC prototype (87.2-95.3%) is higher than [PERSON] [6] (77.3%) and [PERSON] and [PERSON] [7] (88.3%).