Chain fused mortar racks shall be limited to no larger than which shell size?

Chain fused mortar racks shall be limited to no larger than which shell size?

• A. No larger than 4 inch shells
• B. No larger than 3 inch shells
• C. No larger than 5 inch shells
• D. No larger than 6 inch shells

Answer: (D)

Chain-fused racks are limited to six-inch shells to keep ignition control and safety within practical limits. When shells are connected by a chain fuse, multiple mortars fire in sequence, so the total energy, weight, and potential debris from the rack increase. If the shells are too large, the rack becomes harder to stabilize, the risk of a misfire or delayed fuse propagating through the sequence rises, and the blast footprint can exceed what the rack and nearby obstacles can safely absorb. Setting a maximum of six-inch shells ensures the firing sequence remains manageable, the rack stays stable, and the overall risk to crew and spectators is reduced. Smaller sizes aren’t the standard maximum for chain fusing because the regulation is specifically about the safety boundary for this firing method; larger sizes would require different handling and mounting considerations beyond what chain fusing is designed to safely support.

Chain-fused racks are limited to six-inch shells to keep ignition control and safety within practical limits. When shells are connected by a chain fuse, multiple mortars fire in sequence, so the total energy, weight, and potential debris from the rack increase. If the shells are too large, the rack becomes harder to stabilize, the risk of a misfire or delayed fuse propagating through the sequence rises, and the blast footprint can exceed what the rack and nearby obstacles can safely absorb. Setting a maximum of six-inch shells ensures the firing sequence remains manageable, the rack stays stable, and the overall risk to crew and spectators is reduced.

Smaller sizes aren’t the standard maximum for chain fusing because the regulation is specifically about the safety boundary for this firing method; larger sizes would require different handling and mounting considerations beyond what chain fusing is designed to safely support.