January 1990. Didn't remember, but checked the index of rail and model railroad magazines at Model Railroader:
http://www.index.mrmag.com/
Strangely enough, it was not indexed under Weyerhauser -- but a title search by "Rocket" did work.
This is one of the problems with this database. Many articles are not indexed under all the logical terms. But, usually, if you try enough terms, you can find what you are looking for.
A search on my own name brought up some 17 articles, including a few I had forgotten about -- but not all recent articles, including some that ran more than a page -- which is what I would think a basic cutoff would be for not indexing small items.
But, despite its problems, this is a very useful tool, and put together mostly with volunteer time.
-- Ernest