In no case shall the minimum launch site dimension be less than __________ the estimated altitude of the high power rocket or __________.

In no case shall the minimum launch site dimension be less than __________ the estimated altitude of the high power rocket or __________.

• A. 1/4, 1500 feet
• B. 1/2, 1500 feet
• C. 1/4, 2500 feet
• D. 1/2, 2500 feet

Answer: (B)

Safety spacing for a launch site is tied to how high the rocket is expected to fly. The minimum dimension must be large enough to accommodate the plume, debris, and recovery area, so the rule uses two benchmarks and you take the larger one. You must have at least one-half of the estimated altitude, but you can’t go below 1500 feet. In practice, the required minimum is the greater of these two values. That’s why the pair is one-half and 1500 feet. If your estimate is low, the 1500-foot floor governs; if the altitude is high enough that half of it exceeds 1500 feet, that larger value governs. For example, with an estimated altitude of 1800 feet, half is 900 feet, so you’d need 1500 feet. With an estimated altitude of 5000 feet, half is 2500 feet, so 2500 feet is the required minimum. This rule keeps the launch area safe for plume, debris, and recovery operations across a range of flight expectations.

Safety spacing for a launch site is tied to how high the rocket is expected to fly. The minimum dimension must be large enough to accommodate the plume, debris, and recovery area, so the rule uses two benchmarks and you take the larger one. You must have at least one-half of the estimated altitude, but you can’t go below 1500 feet. In practice, the required minimum is the greater of these two values.

That’s why the pair is one-half and 1500 feet. If your estimate is low, the 1500-foot floor governs; if the altitude is high enough that half of it exceeds 1500 feet, that larger value governs. For example, with an estimated altitude of 1800 feet, half is 900 feet, so you’d need 1500 feet. With an estimated altitude of 5000 feet, half is 2500 feet, so 2500 feet is the required minimum. This rule keeps the launch area safe for plume, debris, and recovery operations across a range of flight expectations.