They are difficult to flame and the hardest I have come across. I was testing my convergence (absolutley critical) and found that aiming for the fuel tanks by swooping under and upwards, chopping throttle, was the only way I could rupture them and ignite. Even then, it doesn't always work (in terms of 'flaming') , the AI drop so his rear gunner has you in his sights again but hit the engine from below and down they go. (De-Wilde and AP load out)
From what I have read, the Ju87 was withdrawn from operational use in the BoB due to high losses- something isn't right with the current damage modelling.
