Table 2: HTPB baseline: optimization procedure comparing the initial regression rates 𝑟 𝑓 ( 𝑡 i g n ) (13) and 𝑟 𝑓 𝑖 (14).

Test number Regression rate at ignition (13),Regression rate at ignition (14),Percent variation
𝑟 𝑓 ( 𝑡 i g n ) , (mm/s) 𝑟 𝑓 𝑖 , (mm/s) 𝑟 𝑓 𝑖 𝑟 𝑓 ( 𝑡 i g n ) 𝑟 𝑓 𝑖

1 1.424 1.436 0.8
2 2.389 2.390 0.1
3 2.334 2.337 0.1
4 1.319 1.323 0.3
5 2.092 2.102 0.5
6 1.506 1.509 0.2