nitsujbcnu

hi guys. so i have been watching youtube like everyone else in the world lol and i have come across this kno3 model rocket tutorial. so i got my Stump remover (kno3) and i have pounded kitty litter into the 1/2" pvc tube, making my top end plug about 1/2" thick. then about 4" of the kno3 mixture w/ regular sugar. finishing with kitty litter and drilling a hole for the nozzle about half way through the engine. my problem is this. it burns for a very long time about 30 secs or more. but it doesnt go anywhere. just sits there happily melting my pvc. so i find myself wondering would powdered sugar work better and get me that boost to launch...? No it wont even stay lit. so i am feeling kinda sad because i cant launch my rocket. please help me...