Sadly another Magnum bites the dust. The C11-0 booster blew up, ignited the upper stage motor while blasting it up into the upper body tube, which continued burning inside and lit the tube on fire. Good excuse to build another Magnum I suppose! The failed C11 booster had a date stamp of 6/28/11 and I suspect may have been heat cycled in the shop where they were bought last fall. These things happen with rockets from time to time, so remember to keep clear every time you push the button.