UBSEDS6 was our first launch using a 36” Qualatex Balloon. Despite a bumpy ascent over Bristol the balloon super-pressured and floated at about 8.6km. Favourable winds carried the balloon to Latvia before the tracker failed 14 hours into the flight.
The balloon was “pre-stretched” before flight but pumping air into the balloon using a slightly modified Omron M2 Blood Pressure Monitor. While in flight the balloon experiences about 2kPa of internal super-pressure at 8.5km float (this figure is a vague guess) the balloon was inflated to a pressure of 4.7kPa on the ground (measured as 35mmHg on the Omron M2).
Gif of the balloon inflating from 2.7kPa to 4.7KPa. This takes about 2 hours.
The difference between the balloon at the start and end of the process is very noticable. One of the slides below shows an un-modified balloon on the left and a pre-stretched envelope on the right.
During the day the balloon entered a very stable float at about 8.6km altitude and dropped to a similarly stable float at 8.2km during the night.
No major changes since last launch. The cause of tracker failure is unknown, but possibly due to cold (-30ºC).
- Total distance traveled:
- Great circle distance:
- Maximum altitude:
- Countries passed through:
Thank you to all listeners who tracked this flight!