The answer to "How many pilots scored aerial victories, but didn't make "ace" status?" -
a lot! I don't know the exact percentages, but in the history of aerial combat there were a lot of kills scored by "non-aces".
In addition to his outstanding
Stars and Bars, which highlights American fighter aces 1920-1973, Frank put out 10 separate softcover volumes on ALL victories claimed in a particular theatre or time period, such as "ETO", or "Pacific Theater" or "USMC in WWII", or US victories in WW1 or post-WWII, etc, etc.
Most of these volumes are dedicated to US pilots only, but a couple focus on the RAF and Commonwealth 300 and 400 series squadrons (IIRC), including, to my great delight in the latter volumes (because I almost didn't buy them), all three Eagle Squadron's complete tally of victories - all by date, time, victim, location, pilot involved, a/c serial/codes (usually), and source of "verification". I have all but his US-Mediterranean Theatre and the USN in WWII. I recently picked up the USMC in WWII volume by pure luck ... I was scanning eBay, and the auction was about to end. Not really being a "last second sniper", I simply put up the house and a couple of the kids as my "max bid", and I won it. Update: We live in a nice apartment now, and gosh, we'll miss those kids!
Frank told me a long time ago that he stopped publishing them because his local printer switched formats and his storage system for all his data was now obsolete for hard-copy printing! Frank said further that he wasn't sure about finding a way to publish them again in hardcopy because he didn't think they would sell for what they were worth/cost to produce. He was looking into having them all available as PDFs on CD. I thought that was a great idea since all the data would be available and affordable. I even offered to retail them for him on my site after he did the PDFs, but I got no reply.
Frank said he's working on, or already finished, a
complete RAF in Europe in WWII set - forgot, but it's like a zillion pages long. That one would HAVE to be in PDF format!
You'll rarely see Frank's books listed for sale on the net ... like me, I guess, those who have them are reluctant to part with them!
Stand by for news.
Wade