I am no expert, but wouldn't call it a wasted effort at all. My impression is that they were well-liked, especially in the earlier phases of the SWP ops. I don't think you can read much about our move back into the Solomons without encountering APDs...
I wrote a thumbnail history of one such ship recently for a family whose Dad served on USS BROOKS (APD-10) and it was interesting research indeed. We were able to uncover more information re the tokko attack that disabled her in Jan. 1945 off Lingayen than had previously been known (or published) as well. The gentleman who served on BROOKS was blown overboard by that strike, so putting together the pieces of that puzzle was a satisfying little exercise.
The navy certainly got its money's worth out of that old ship...and other flushdecker conversions.
While the conversions themselves are pretty fascinating (since some of the first alterations more or less matched suggestions made 20 years earlier by none other than Holloway Frost), a good narrative history--as opposed to tables of data & technical details--of these ships' wartime careers would be well worth seeing into print, IMHO.
And, after all, one of the finest works of literature about the navy in WWII that appeared subsequently was based on a converted four-piper (although a DMS, rather than an APD)...
: Was rereading the Squadron book on destroyer
: escorts particularly the section on APDs.
: 95 DEs converted plus 30 some odd four
: pipers. Quite a sizable group but as I
: think back on all the reading Iíve done on
: the USN in the Pacific I donít recall much
: or even any mention of the APDs. Nor do I
: recall much photo evidence.
: So, was the APD program a dead end? Wasted
: effort? Any APD experts out there?