There is no smoke system, the batteries are 2 1600mah for reciever nimh,and one 1400mah nicd for ignition. I only added one small servo tray for the pull pull to get it to balance.I dont know why it weighs in at 30 and half pounds but it seems that all the 33% and 35% planes that I have built come out to 29 to 30lb. Maybe it's the crappy New England weather soaking into the wood.