Hell yes, back in the day i made one that was about 5kg once cooked, i set it off in the backyard it made so much smoke half the neighbour's got in there cars an left, they had no idea what the strange smelling smoke was lol. 2 fire engines rocked up aswell lol. I said i had a bad BBQ fire lol. After they left we hopped in the car an followed the smoke cloud for almost 3km it was insane. Good times
I remember too. It was a white phosphorous (WP) and it was evening of summer, with a gentle steady gust. That smoke created like 100 meters long smoke trail completely blocking visibility to other side because that wind and lighting condition. But there really is not so much smoke in those. 60 seconds can sound long, but in combat that is requiring very good timing to mark something for cooperative engagement. So when example friendly fighter is ready to attack enemy, you mark your position with smoke and request pilot to tell what color it is when he spots it and then confirm if it is correct (this to avoid enemy throwing same color as yours when listening radio, as pilot does the color code) so that pilot knows where you are and is not attacking you. 60 seconds is short enough that enemy might not have enough time to spot it, get a proper color smoke green and smoke their position as well, but problem is that then you coordinate that what compass direction you are at, so if pilot sees a two yellow smokes, you can say "We are the South-West one". It is as well enough for a helicopter pilot to spot the position when approaching and having a radio contact with troops for general area, as well the radio tracker to give the general direction to the radio emission, but as those radios are typically handheld ones you have limited 4-5 km range when having line of sight. So you need to get to about 1-2 km to have a idea of generic large area (the radio direction antenna system goes wonky closer you get, but you are about 2-5 degree heading from the place) and then when talking through the landmarks and such, the smoke will effectively give that 1 minute time for pilot to find your exact location and get there, before someone else spots it and gets there before helicopter. But I wouldn't use those for concealment or such, as you need to be in fairly deep forest where there wouldn't be strong wind etc to get it spread and float enough to make difficult to see movement when retreating or advancing. And one minute can feel forever in those scenarios.
Can't the M18 be setup to have a 1.2 to 2.0 second delay with its fuse? I was just wondering if this was the case because of some information I found on wiki about the Fuse Assembly "M201A1 Pull-ring Igniter. A "mouse trap" type igniting fuze with a 1.2 to 2.0 second delay. Ignition ignites the filler and expels it from the grenade body. "
