The Hurricane in France leaves a distinct smoke trail as the engine splutters - I've noticed that happen to a Spitfire (a MK V which I think had the floatless carb?) being rolled and looped at a an airshow - why does that happen?
It's a rich cut, caused the carb failing to funtion correctly under conditions of less that 1 'G'.
As BEagle says, Miss Shilling's orifice sort of cured it. But not fully. It was such a cut, in one engine only during a wing-over, that did for the Mossie at Barton some years back.
SSD