A type o' ignition sometimes used for BP clusters. T' rocket is placed in a pan covered with a thin layer o' black powder. Begad! When t' rocket is t' be launched, t' powder is ignited with an electrical igniter. Begad! T' resultin' flash sends burnin' particles into t' motor nozzles and fires all t' motors in t' cluster simultaneously. Blimey! CAUTION: This technique presents dangers when used with black powder, and must NEVER be used with composite motors which ignite from t' front.