I've begun work on modifying some existing hardware for a new SStS motor. This design will incorporate a new non-pyrotechnic device to separate the two motor chambers. In theory the Chamber Separator Disk has a number of benefits over the pyrotechnic "plug". This document explains the concept and you can see some of the analysis that Ben Brockert has been working on here. Pretty simple in theory. This newest motor will also feature a return to the Bates grain configuration. For more info on this motor and other recent updates, please check the Sugar Shot weekly activity reports located at the top of this page.
This is the modified MidBulkhead showing the area that the CSD will be retained.