HacDC Spaceblimp 3

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SB3 teaser image.jpg

Spaceblimp 3 went up with two still cameras and a non-functioning video camera. There are tons of neat pics from both. These links get you into the series right before liftoff.

These are about as far out as we got before the balloon popped:

And then, recovery:

The Dataz! (Telemetry)

  • Accelerometer data. Unfortunately, it looks like there was a bug in the code and the second half of the data overwrote the first. Anyway, here it is. It's 100 samples per second, start time unknown, but it looks like it captures the pop, some freefall, and the landing. Media:AccelerometerDumpfile 2010-11-13 18-24-41.csv.gz

Launch Details


Logistics planning and radio check meet: Monday Nov 8, 7:00 PM at HacDC
Planned launch date: Saturday, November 13, 2010 (Rain date November 14).
Launch time: 9:00 AM, Launch should take less than an hour.
Launch Location:
Time: arrive at 9:00 A.M. (please be on time!)
Where: Clear Spring Public Library
Address: 12624 Broadfording Road, Clear Spring, MD 21722-1361
Lat/Long: 39.65664, -77.93637
North on I-270
Exit 32 to merge onto I-70W
Exit 18 to merge onto MD-68W
Left at US-40W/National Pike
3rd right onto Broadfording RD
Library is on left
Coordination/Talk-in: 146.415 MHz simplex
Planned Altitude: 92,000 feet
Planned Ascent Rate: 1,000 ft/min
Primary Beacon: Tiny Track 4 with 0.5 W transmitter on 144.390 MHz, call sign W3HAC-11 (map). $3 GPS module
Secondary Beacon: Son-of-WhereAVR with ublox GPS. Yaesu VX-1 handi-talkie with 1 W Transmitter, call sign W3HAC-12 (map), Frequency 445.15MHz
Other sensors: Recording accelerometer, air pressure based altimeter, cosmic ray counter

Help Wanted:

If you spot something you can handle or wish to learn about, we'd love to have your help. (Seriously, meeting more people like you is major goal of HacDC.)

  • Blog about upcoming flight
  • Document HacDC Spaceblimp 1 on wiki
  • Build primary & secondary beacon antenna
  • Altimeter selection & purchase
  • Purchase 32 GB SDHC memory card for video
  • Build battery pack for video
  • Make weatherproof labels/tags for capsule recovery (laminate, 3d print, laser cut, etc.)
  • Work on CHDK scripts for still cameras
  • Build capsule/rigging/chute
  • Vacuum test Geiger counter
  • New software for additional sensors (add small μC?)

Contact Info:

If you would like to help, contact

HacDC Spaceblimp Project:
Main Page Press Page First Launch (Found) Second Launch (Successful)
Third Launch (Successful) Fourth Launch (Successful) Fifth Launch (3% short of goal) Sixth Launch (Successful) Seventh Launch (Successful)

HacDC Spaceblimp Team Contact Info:
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