User`s manual

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After you hit the letter for the flight, you will be prompted to hit the button to start the download. At
this point, you should go into your terminal program and select the appropriate option for dumping
the text to a file. Since the summary data and the detail data are dumped in two separate operations,
you can save them separately by simply closing the buffer after dumping the summary data, then
opening it again for the detail data.
We recommend that you use a file name like “Flight 2012-08-26 No1.txt” for the summary data, and
“Flight 2012-08-26 No1.csv” for the detail data. This way, when you open up the data files you will
automatically associate the data type with the right program, i.e. Notepad (or Notepad++ if you have
it… if you do not, we recommend that you get it; you’ll never use Notepad again!) for the summary
data, and Excel for the CSV-formatted detail file. Be sure to use “.csv” as the extension for the
detail data if you want Windows to recognize it as a CSV file when you open it.
For example, here is some actual flight data, taken from an Estes Vagabond that was modified for
multiple deployment. (We really like this rocket, it’s an easy hack and it’s cheap so if you wreck it
you’re not out much). The rocket’s weight was just over 3N ready to fly, we used an Aerotech
24mm 24/40 RMS F24-7 reload with the motor’s ejection charge being used for the drogue (a 12”
plastic chute with a big spill hole) and a “pistol powder” ejection charge set to fire the Main at 300’
(an 18” nylon chute). We used 8 samples/second for both the Burn and Coast samples (derived by
taking the motor’s 24N average thrust and dividing by the weight of the rocket, 3N, giving 8
samples/sec), and 2 samples/second for the Descent. The Burn Timer was set to 2 seconds.
When you press the button to download the summary data, you will see something like this. Note
that all times are in milliseconds, referenced from the t=0 sample (the last sample in pre-launch
memory with an altitude <= 0).
Flight Summary:
Eggtimer Build-1.45 Flight Settings
...Comments:...Flight 2012-08-11b
...Launch Detect Altitude <50-500 by 50>...200
...Burn/Coast Samples/sec: <4,5,8,10,15,20,25,33>...8
...Interval (ms)...125
...Descent Samples/sec <1,2,4,5,10>...2
...Interval (ms)...500
...Main Enable <0-Off, 1-IGN, 2-Servo CCW, 3-Servo CW>...1
...Main Altitude <100-2000 by 50, 0 @ Apogee>...300
...Main ON-Time <1-9,0-Cont.>...2
...CHB Enable <0-Off, 1-IGN, 2-Servo CCW, 3-Servo CW, 4-Airstart>...0
...CHB ON-Time <1-9, 0-Cont.>...2
...Burn Timer <1-20>...1
...Telemetry...0
ASL Altitude: 557
Temperature: 3840
Beep Code: 0
Apogee:1215
Time@Apogee:7375
Max Velocity:280
Time@ Max Velocity:1875
Flight Timer:49000
Altitude Burnout:248
Time@ Burnout:2000
Altitude Burn Timer:391
Time@ Burn Timer:2625