Last week, at Grognardia there were a couple of posts about how Knight Hawks, the Star Frontiers additional rules that allowed for space flight/combat, were a little too late.
I never had the Knight Hawks rules until they were 'digitally remastered' by the star frontiersman folks, but I never really missed them. We played quite a bit of SF when we weren't playing D&D, and most of our games were basically either "Westerns with laser guns" or "Vietnam with Aliens" when they weren't blatant ripoffs of whatever sci-fi movie we'd recently seen (Aliens, Predator, Critters, various events on Star Trek TOS or early TNG, even Ghostbusters).
We sometimes commented on the fact that there weren't rules for being Luke Skywalker or Starbuck, piloting that fighter ship against the enemy fleet, but since we knew of the existence of Knight Hawks (I think I got SF in 1986), we didn't worry too much about it. And we didn't really miss it.
Basically, we just took either the 'creature of the week' attitude, the explore the strange planet adventure (typically resulting in the Vietnam with Aliens vibe), or taking the law into our own hands to stop Sathar agents in Port Loren (Westerns with laser guns). And it was a lot of fun.
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