FLIGHT: SuperPressure Initiated Termination Balloon Flight Test SPITBALL-1
FLIGHT HAS COMPLETED SUCCESFULLY. FLIGHT ANALYSIS HERE.
LAUNCH DATE: SUNDAY NOV 20 2011
LAUNCH TIME: 11AM~12PM EST
CREW REPORT TO LVL1 AT 7:30AM
LAUNCH SITE: SPACEPORT INDIANA, COLUMBUS, IN
LIVE TRACKING LINKS:
Interactive Vokle Video Q&A
Web Map Tracking (APRS.fi WB8ELK-11)
Find me spot gps map
White Star will be performing a test flight of an actual transatlantic balloon envelope. The test flight is expected to last less than 1 hour from launch to impact. Telescope tracking of flight will be attempted.
Primary Objective: Determine burst pressure of Global Western Zero Pressure TA balloons.
Secondary Objectives: Observe aerodynamic effects during climb of the asymmetric balloon design.
Payload will be ballasted to full 12 lbs by bags of water
These are the weather conditions required for a safe and useful launch. If these are exceeded, the launch will be delayed until later in the day, or to another day.
RTC offset from real time, as measured at 20111120 01:04:50: -00:03:16
Measures differential pressure every second, reading a tube ported into the balloon at the load ring. This package is strapped to the balloon, necessitating recovery of the balloon envelope.
Balloon envelope will be a White Star trans-atlantic ZP envelope from Global Western.
Cutdown is a thermoelectric nichrome rope cutter. The cutdown will sever the main support rope that goes to the cardboard load ring. The weight of the payload will then be taken up by the inversion rope attached at the top of the balloon, causing the balloon to flip upside down.
The timming of the switch settings is shown below.
S4= 1 Minute S3= 15 Minutes S2= 30 Minutes S1= 60 minutes
4xAA New Energizer lithiums used in this.
Full details: Timer Cutdown v1 by Carl Lyster
In the event that the natural burst does not deflate the balloon within a reasonable amount of time.
|Balloon Angular Size °||0.229||0.114||0.076||0.057||0.045||0.038||0.032||0.028||0.025||0.022|
based on http://www.1728.org/angsize.htm
Telescope Focal length: 2500mm
Weather Alternate Date - Sunday Nov 20 Crew Avail: