Long bursts more effective than multiple short ones?

[MaxGunz]

If you have leaked fuel inside the plane then a big rush of oxygen and a spark is all you need for a fire or an explosion. There's enough oxygen in those tanks to last a pilot for hours, not minutes.

Russians ducted cooled exhaust gases into the fuel tanks to not have oxygen right over the fuel. The US has at least one that put CO2 in the tank. But no one was filling the wings and fuselage with exhaust or CO2.