Is passing the L39 combat evaluation a mattter of speed, accuracy or both?

[gmetzo]

So far I've only gotten 50% score both of the times I've tried. So the instructor will not allow me to continue with bombs once I land. Curious to learn if I just need to be faster or waste less ammo? I though you need to empty your rockets and guns like the previous missions but maybe the instructor only want accurate salvos? Also does the instructor take in account your flying? Like doing the proper turns like in the previous missions? no matter what I do he will not allow me to pass.

[SL PAK]

You need to hit the target.