I received a second Semroc Little Joe II for Christmas this year. The Semroc Little Joe II is based on the A-001 mission.In the second build I decided to build it like the A-004 mission.The Little Joe II was a rocket built between 1963-1966 to test the escape system for the Apollo program and also to test the landing of the command module capsule.The Little Joe II had 5 missions: QTV, A-001,A-002,A-003,and A-004.
Here is a chart of the mission statistics.
Launch configuration summary
|Launch weight||25,930 kg||26,281 kg||42,788 kg||80,372 kg||63,381 kg|
|Payload||10,988 kg||11,492 kg||12,561 kg||12,626 kg||14,717 kg|
|Airframe weight||14,942 kg||14,785 kg||29,320 kg||67,745 kg||48,623 kg|
|Liftoff thrust||49 kN||49 kN||1,600 kN||1,395 kN||1,766 kN|
|Fin – fixed/control||F||F||C||C||C|
|1st stage Recruit||6||6||4||0||5|
|1st stage Algol||1||1||2||3||2|
|2nd stage Algol||0||0||0||3||2|
There were two anomalies during the missions.
-In the QTV(Qualifying Test Vehicle) the destruct mechanism failed after a successful flight.
-A-003 “At approximately one second after liftoff, the Fin IV elevon moved in a direction to cause the observed clockwise rotation and at 2.5 seconds reached the fully deflected position where it remained until vehicle breakup.”
The Semroc Little Joe II is a wonderful build for those of you seeking a more challenging rocket model. I highly reccommend reading these threads (LJ II, Saturn 1B -tower info) before preceding. Take special care and time in building the launch tower. The struts require patience and great dexterity.
Here are some reference links on the Little Joe II