Reviews

• Ellis Mountain Rocket Works Ellis SU J228 By Dick Stafford

  ( Contributed - by Dick Stafford - 04/25/05) Brief: The Ellis Mountain J228 38mm single use motor provides a total impulse of 1104 N-S (72% J), giving a burn-time of 4.8 seconds. It is about 22 inches long including the turned-aluminum forward closure. Construction: None required, unless you consider adding a masking tape thrust ring as "construction". Flight: ...