[QUOTE=user_hostile]
A landing on terra firma, however, does apparently allow reuse. I can prove it by noting you’ve never seen the Space Shuttle using water skis on landing 
Unfortunately, I failed to ask the obvious follow-up question: so did the Soviets reuse any of their manned vehicles? I don’t know; Stranger on a Train do you know otherwise?
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As user_hostile indicated, the cost and risk of recovering and refurbishing a spacecraft after exposure to salt water makes it not worth the effort. The SRB cases, however, are like cartridge brass; you just sandblast them, check their trueness, and fill 'em back up. (It’s not quite that easy, but they aren’t sophisticated hardware. IIRC, Feynman has a description of the refurbishment process in What Do You Care What Other People Think?.) The cases aren’t the only thing that is reused; nozzles, thrust vector actuators, and the APUs are supposed to be reusable if not damaged by the landing. The ordnance and descent systems are not reused for reliability reasons. I’m not sure how many actual reuses they get out of each SRB, but I’d guess somewhere between 5 and 10.
Back when the Air Force was planning to use the STS for polar orbit launches out of VAFB, they had a fiber-wound composite case designed. Due to the lower bending strength of FWC they used a different “forked” joint design which ended up very similar to the redesign of the SRB after the Challenger disaster. These cases would not have been reusable, AFAIK.
The Russians don’t reuse their Soyuz capsules, but they have had a number of other concepts and at least one operational spacecraft that was designed to be reusable, that one being the Buran shuttle. Like the STS, Buran was vertically launched, albeit all of its boost came from external (liquid) boosters, a single main Energia booster burning liquid hydrogen with a liquid oxygen oxidizer, and 4-8 Zenit strap-on kerosene/LOx boosters. The Zenits were designed to be partially reusable (and still find use today in both whole form and main propulsion systems in a variety of launch systems) and the Russians had plans for a later generation of boosters that would be completely resusable, flying back to the launch point for immediate refurbishment. (This is something that was also considered by NASA during the STS development, but shelved as a later phase, and then indefinitely, owing to time and budget constraints. Liquid fly-back boosters were still being studied, at least provisionally, through the late 'Nineties.) Except for one unmanned test launch, Buran has not been used, but like the Shuttle it is reusable, albeit now destroyed in a hangar collapse, with other models in states of partial construction.
In looking around at the recent developments on the Ares I launch vehicle and Ares V heavy booster, I see there is considerable discussion on whether to reuse the lower stage motors (a 5 segment booster based on the SRBs). Brilliant.
Stranger