Flight Twelve - Floater - Launched on March 23, 2019 @ 8:30am
Balloon Size: SBS-13 balloon - LINK
Payload Weight with String: 13.22 grams
Neck Lift: 18.22 grams
Free Lift: 5 grams
Cruising Altitude: 38,500-41,000 feet
Burst (predicted): Shooting for 1 trip around the globe
Time Aloft: 19 days and 4 hours
HAM Call Signs: KD0VJI-4
Launch Location: Forestview Middle School

UPDATED: April 18, 2019: Our super pressure balloon made 1.5 laps around the Earth. The last check in was on April 12th just north of the border of Sryia and Turkey. The balloon travelled a total of 26,383 miles and was aloft for 19 days and 4 hours. The highest altitude we encountered was 41,263 feet. We average right around 40,000 feet in altitude as we travelled around the Earth.

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Getting the final weights dialed in Weighing the attachment cords Weighing the attachment cords
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Unfolding the SBS-13 balloon Filling the balloon with helium Checking for neutral buoyancy
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Sealing the balloon neck Checking for a good seal Trying the string nice and tight
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Wrapping the tape to secure the string Checking for a good tight fit Securing all the attachment strings.
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Getting the attenna secured in place Wrapping connections with tape Getting the SkyTracker ready
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Checking to see if eveyything is secure Waiting for the wind to calm a bit Letting it go and hoping we did it correctly
Nice video of neutral buoyancy. The balloon is now lifting 18.22 grams at the neck of the balloon.