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Project Home
On Saturday, December 28, five members from two teams traveled to the Maryland launch site to practice
launches. It was a nice sunny day, about 50f, and wind below 8mph. We used the 7ft launch rail, set to about 5d with
the wind.
We completed four launches during a 2 hour launch window. We recovered all the rockets, although some landed close to
the pond.Objectives
- Try two launches for each team to narrow the best weight with the motors:
Team 14211 - single use motor F30-6FJ
Team 14212 - reloadable motor
E28-7T
- Practice assembling reloadable Aerotech motor E28-7T
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Lessons
- All the launches were relatively straight, all rockets were recovered, and the teams worked well together.
We need to get the other two teams out to a launch.
- We had no igniter failures, no spitting, good ignitions.
- The chute configurations worked OK, but the blue rocket (Team 14211)
seemed to have some tangled chutes. It came down too fast. They need to make the line
between the booster and cargo longer, more distance between chutes, and perhaps use the new
chutes. The green rocket (Team 14212) seemed to have a better deployment. Their last flight
had the chutes float a bit too much. It may have been the thermals from the sun warming up
the field.
- All the motors worked OK, even the ones that were assembled. We have enough data to
set target weights for both teams.
- Both teams are ready to try a qualification launch. Team 14212's second launch had a
TARC score of 7.
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Launches
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Rocket |
Engine |
Rail |
Cargo |
Recovery |
Weight |
Results |
Comments |
Blue flight 1
Team 14211 |
F30-6FJ |
7ft 5d |
2 eggs,
altimeter 5 |
2-15" Round |
497g |
782ft,
42sec |
video, Straight flight, chutes deployed OK |
Blue flight 2
Team 14211 |
F30-6FJ |
7ft 5d |
2 eggs,
altimeter 5 |
2-15" Round |
469g |
858ft,
42sec |
video,
Straight flight, chutes deployed a little tight |
Green flight 1
Team 14212
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E28-7T |
7ft 5d |
2 wood eggs,
altimeter 3 |
2-15" Round |
416g |
785ft,
44ec |
video, Straight flight, a little low |
Green flight 2
Team 14212 |
E28-7T |
7ft 5d |
2 wood eggs,
altimeter 3 |
2-15" Round |
415g |
826ft,
52sec |
video, Straight flight, chutes floated some |
Altimeter Data
(Excel format)
Pictures
Team 14211
Team 14212
Preparing the Rockets
 
Loading the Rockets
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