| 摘要 |
PROBLEM TO BE SOLVED: To efficiently fly a flying body and to improve reliability and safety of it. SOLUTION: A lapse of time between launch of a flying body main-body (11) and arriving at a top point is detected and current speed when passing the top point is detected as well. A first memory (51) is provided in which such relationship data is stored in advance among a set value for amount of a firing chemical filled in the flying body main-body (11) based on preset discrete value, a transit time at the top point, a current speed at the top point, and a firing angle. A second memory (52) is provided in which an initial speed of the flying body main-body (11) corresponding to the set value for the amount of firing chemical is stored in advance. Based on the detected transit time and current speed as well as the relationship data in the first memory (51), a set value for the amount of firing chemical is deduced, for deduced various firing elements, and based on the second memory (52) along with the deduced set value, an initial speed is deduced. The position, current speed, inclination, and expected landing point of the flying body main-body (11) are deduced from the deduced initial speed and firing angle.
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