We send stuff into the stratosphere and sometimes get it back again

We are the Bristol branch of UKSEDS (UK Students for the Exploration and Development of Space). Here are some of our projects.

Launch of Two G-Class Rockets

During the 2015-2016 academic year Bristol SEDS built a second G-Class model rocket, named Whitebird Heavy. It was entered into the UKSEDS National Rocketry Competition.



The UBSEDS20 balloon was built from 50 micron thick PA-EVOH-PE multilayer film and was 1.9 meters in diameter. This is 0.4m more than the usual 1.5m diameter. The larger size meant the longest axis of the balloon and payload combined was more than 2 meters, and so a NOTAM was required and obtained for the launch.



Like UBSEDS14, the UBSEDS15 balloon was built from 50 micron thick PA-EVOH-PE multilayer film and was 1.5 meters in diameter. The payload weight was 20 grams. We used slightly more helium than for UBSEDS14; combined with about 3 grams of deadweight (including the fill inlet) this resulted in 17.2 grams of free lift. This initial float altitude was 11.4km (37,000 ft).


High Altitude Balloon Launch

The main project of 2013/2014 was to launch a high-altitude balloon into the stratosphere, where it could take photos and video, and to subsequently recover it. The balloon was successfully launched on the 15th June from an airfield near Tewksebury, Cheltenham, and landed near Glastonbury. It reached an altitude of 32 km, and spent about 3 hours in the air.