William R. Thompson wrote:

Ed Cannon wrote:

By the way, besides Okean O Rk, quite a few other Zenits started
out as fast tumblers. They have all slowed down or even stopped.

Do you know if any of them have broken up before they slowed down?

Russel Eberst pointed out in an e-mail that the Kosmos 2227 booster
(92-093B) broke up into some two hundred pieces. If the Zenit-2
upper stage has been strengthened since then, it might not happen
again; on the other hand, it gives me a reason to keep watching
04-021B

--Bill Thompson