Explorer Post 1010
Lockheed Martin Exploring Program
Launch February 24, 2007
 
 
We had a nice Saturday launch day between snow storms at the Old National Pike Park. The wind was below 10 mph and the temperature was over 40 degrees.  The field was a little wet as the show melted on frozen ground, but we got off some nice flights and are closing in on some rockets that will give us a good TARC qualification score.

Objectives:

  • Get some altitude data with the new altimeters.
  • Use real eggs to check the padding techniques and impact issues.
  • Check out version 2 of the Fat Boy design and the Big Daddy rear ejection design.

Lessons:

  • All the flights were relatively straight up, but there were different directions of the end of the flight at apogee.  We may have over or under compensated for the wind coming out of the Northwest.  Some came down close to the Northeast tree line, but some came down on the South field hill.
  • We have to learn to clean out the reloadable hardware immediately after launch.
  • We had no problems with shock cords, parachutes burning, or cargo units opening up.
  • We had a problem getting the Aerotech igniter to work.  We need to investigate other sources for igniters. We also need to acquire the small rubber bands that are used to hold the igniter.
  • Since we had some extra time between launches due to the weather, we were better organized with our rocket and tool boxes.
  • The Big Daddy, version 2, flew three times on three different motors. The first two times were nice and the chutes deployed correctly.  The last time we had premature deployment of the chutes and the rocket and engine casing were damaged.  After looking at the engine casing, we believe the propulsion gases got around the top "O" ring and ignited the ejection charge.

 



 

Launches

Flight Load Results Order Comment
Big Daddy V2
Flight 1
(Video1, Video2)
E9-4, 2-12" Chutes
Wooden Egg
Altimeter Weight
36 sec
about 600 ft
2 Chutes deployed nicely
Big Daddy V2
Flight 2
(Video1, Video2)
E15-4, 2-12" Chutes
Wooden Egg
Altimeter A
31 sec
698 ft
Altimeter Data
4 Score: 166 - Nice flight, chutes deployed nicely, wind cocking reduced altitude
Big Daddy V2
Flight 3
(Video)
E18-4, 2-12" Chutes
Wooden Egg
Altimeter A
6 sec, 50 ft
Altimeter didn't trip
6 Chutes deployed on ignition.  While there was damage to the rocket, engine cylinder, and chutes, the altimeter appears OK and it wasn't a total loss
Fat Boy V2
Flight 1
(Video)
D12-3, 18" Chute
265g, Wooden Egg
Altimeter Weight
33 sec
about 500 ft
1 Nice initial flight, landed OK, no wobble in launch
Fat Boy V1
Flight 1
(Video)
E9-8, 18" Chute
280g, Real Egg
Altimeter B
54 sec
about 778 ft
Altimeter Data
5 Score: 82 - Nice flight, landed nice, egg OK, a little wobble in launch, loss some altitude to land away from trees
Executioner V1
Flight 1
(Video)
E18-7, 18" X Chute
330g, Real Egg
Altimeter A
45 sec
915 ft
Altimeter Data
3 Score: 65 - Nice flight, no burns in chute or shock cord, landed beyond trees, egg OK, altimeter spiked at ejection

Pictures

Getting ready for recovery
The return from recovery
Checking the results
Time to pack up and review the results

Problem with rear ejection rocket motor.
Copyright 2007 Lockheed Martin Exploring Program
Updated: March 1, 2007