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Monogram acquired Aurora's molds, but most were lost in a train derailment, so they are gone forever (though Polar Lights has copied some of the Aurora kits for reissue). The Nike Hercules was also kitted by Revell in the larger 1/40th, and is available in reissued versions. Renwal also did a Nike Ajax in 1/32nd sclae, which was also reissued by Revell after they acquired the molds. I don't believe there were any kits of the Nike Zeus version.[/quote]
I've heard the "train derailment" story before, which I believe is a true event, but in a recent interview of Revell-Monogram I think they said the reason so many Aurora molds were lost was due to poor storage and copper/bronze mold liners, causing the molds to deteriorate to a point they were no longer usable. This happened before Monogram acquired the molds. Renwal made the 1/32 Nike Ajax, Revell made the Nike Hercules in 1/40 scale-- both of which have been re-released by Revell-Monogram in the History Makers and more recently in the SSP programs. The Nike Zeus was intended to be the ICBM intercepting member of the family, but never fielded, and was terminated in the development stage, which explains why no mainstream kit manufacturer released it. It simply cost to much to develop (estimated to be $15B), with too many technical difficulties in actually getting it to intercept an ICBM. The Ajax and its big brother were intended to intercept "air-breathing" targets. Both the Renwal Ajax and and Revell Hercules are ok in outline, but are inaccurate in surface details, I've compared them to the actual missiles at the Fort Lewis Military Museum, along with a fellow modeler, who has made accurizing the Revell Hercules a pet project. Both use typical 50s and 60s modeling technology, such as raised panel lines, which is to be expected, with the Renwal Ajax being more actuate then the Revell Hercules. I've seen the missile body of the Aurora kit once in my lifetime, so I can't comment much on its accuracy, but in shape and outline it looks like it fits the bill. Monogram released a US Missile kit, in about 1/277 scale (if I recall correctly) that contained an Ajax, a Hercules, and may have had a Zeus-- I just traded mine a few weeks ago as I didn't think I'd ever build it.
VR Russ