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.
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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
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The return from
recovery
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Checking the
results
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Time to pack up and
review the results
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Problem with rear ejection rocket motor. |
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