>> 200 feet is about the closest I want to be to the mortar type fireworks shot off in my neighborhood, thanks. 200 feet is about the altitude attained. P.S. No problem viewing from that distance! <<
OK, sure. If it’s a “mortar-type firework” that attains 200 feet, yes, stay 200 feet away. You’ll see my “formula” suggests staying further than that! But the fireworks shown are more like 20-foot fireworks. Heck the PROFESSIONALS barely even use 200-foot fireworks anymore; they aim for “under the weather” to increase visibility and minimize pollution. But I’m not contradicting you: there’s lots of people who love to “go big.”
The other night I was trying to estimate the vertical speed of the bigger shells. It seemed in the neighborhood of 200 mph (300 feet/sec) or a little less. I haven’t yet looked up actual figures but that seems in the ballpark.
*I did look it up — given as 333 feet/sec