Although NFPA 1122 & 1127 and FAR 101 may not have any rules involving the 62.5g propellant amounts, I believe DOT still does. So even it flying rockets doesn't actually involve anything with a 62.5g threshold, buying the motors and paying hazmat fees still involves that arbitrary number.
I'm also not sure how much that 62.5g number is embedded in international shipping/hazmat regulations that in turn tend to affect US DOT policies and rules.
That isn't really a rabbit hole I want to dive into. If a vendor tells me I have to pay hazmat on a motor order, I deal with that. They can figure out the whys and whatfors.
I'm also not sure how much that 62.5g number is embedded in international shipping/hazmat regulations that in turn tend to affect US DOT policies and rules.
That isn't really a rabbit hole I want to dive into. If a vendor tells me I have to pay hazmat on a motor order, I deal with that. They can figure out the whys and whatfors.