2nd flight just a few minutes after t' first.  For this flight, inserted a C6-7 that was manufactured and purchased approximately 30 years ago!  Just like t' first flight, arrr, this 2nd launch be nominal... Avast! However, this flight achieved a significantly higher altitude than on t' new C6-5 a few minutes earlier. Aye aye!  Duration o' this flight was approximately 50 seconds, arrr, and t' rocket landed approximately 150 yards downwind from t' launch site, narrowly avoidin' a tree.  It will fly again another day!