Scotty.d
Close but no cigar or star. I would not risk my future career on that one.
If you are having rapid explosions in or before the combustion chamber you probably have a compressor stall on your hands. The flame front propagated in the combustion chamber is continuous (no rapid explosions) as long as there is an undisturbed air flow from the compressors and fuel available.
Beg borrow or steal
The Pratt Whitney book, the Rolls Royce book and D P Davies Handling the Big Jets read learn and inwardly digest then see if you come up with the same answer.
The twin. If you already have a career you should know better if you haven't then you probably wont get one.