Odd question based on the fact you are worried about a potential 'bomb'. This is such a small quantity of gas it is nothing in relation the the real 'bomb' - your 3 odd litres of kerosene if you hit the deck and the turbine goes through it! Don't worry about it, there are thousands of gas start turbines flying, this is not a common problem. Buy a kerosene start Jetcat of you are that worried.