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Members of Team 2 and Team 3 traveled to the National Pike Park for
one last test launch before they make a run at qualification. There
was a prediction of bad weather, but it turned out to be great -- low
wind and warm. Team 1 started to the launch site but had issues with
their rocket. They also have an issue with their overall weight
of greater than 500 grams. They don't see how a maximum thrust
24mm engine will get it to 750 feet. We had some successful flights,
but lost a rocket in a tree.
Objectives:
- Team 1
- Planned to launch with a timer,
but were unable to get the ejection charge working.
- Team 2
- Decided to use the Executioner
from last year as a backup to their V2 and timer effort.
They needed to see how it flew with two eggs.
- Team 3
- Needed launch their new red rocket
-- both initial flight and a full up qualification test.
- They need to add weight to the
black rocket to see if they can reduce the altitude to 750 feet
with an E18-4 engine.
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Lessons
- The red rocket is almost 500 grams
and needs an F39 engine to get to 750 feet.
- We added too much weight to the
black rocket. It looks like 420g is about right
- The chute for the Team 3 boosters
need to be less than the regular 12 inch. It needs a spill
hole of at least 2 inches. We may also try a 12 inch X-chute
- The new altimeters produce smoother
altitude curves.
- The double chute configuration
creates a spike at ejection -- probably caused by the chute grabbing
air. We may want to use a shock cord and one chute.
- The Executioner from last year
worked great.
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Launches
|
Rocket |
Weight |
Engine |
Electronics |
Chutes |
Results |
Comments |
Red
(video) |
466g |
E15-4 |
No Altimeter |
X-18in
12in-spill |
about 400ft, 25sec |
Launch was under powered, and the rocket cocked into the wind.
The chutes deployed OK and the eggs survived. |
Executioner
(video) |
413g |
E18-4 |
Altimeter B
(no data) |
X-24in |
640ft, 32sec |
Launch was nice. Altimeter has a problem with the computer connector. |
Black
(video) |
446g |
E18-4 |
Altimeter D
(data) |
X-18in
12in |
713ft, 38sec |
Nice launch, drifted with the wind, rocket booster in the trees. Spike
in data. Score 51 |
Executioner
(video) |
420g |
E28-4 |
Altimeter A
(data) |
X-24in |
752ft, 50sec |
Nice launch. Score 12 |
Red
(video) |
496g |
F24-4? |
Altimeter E
(data) |
X-18in
12in-spill |
604ft, 33sec |
Launch launch and recovery, the engine was built last May. Spike in
data. |
Data
(altimeter
data)
Pictures
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