Space anime from 80s/early 90s, with a distinct ship design and female pilots
A bit of stab in the dark, but I think you might be referring to something by Leiji Matsumoto. Beautiful long-haired women are a dime a dozen in his works, and there are at least few ship designs with something like a winglet on the underside.

The Spacewolf fighter from the various Captain Harlock TV shows and movies usually has a winglet on the underside. The version on the left below, from Arcadia of My Youth: Endless Orbit SSX, is noticeably swept forward. The enemy Mazone fighters, always piloted by women with long hair, also can have something like a underside winglet, like the example below on the right. 




Apparently the fighters in Space Battleship Yamato sometimes had a bottom mounted winglet:



It's a bit of a stretch, but but if you didn't realize how big it is, The Queen Emeraldas, kinda sorta fits your description. It has a long "streamlined" shape and the gondola can sorta look like a forward swept winglet depending on how it gets drawn. Despite its size I believe it's usually shown a being piloted by one long-haired woman.



(Click on any of the above images will take you to a page with more images of similar craft.)

Unfortunately I'm can't suggest any specific titles or episodes. I'm not that familiar with these works, having only a watched a few Captain Harlock episodes recently and a handful other shows in French as long, long ago as a kid. Hopefully this will at least help narrow it down.