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Noha307 Thanks for compiling this list, but I would like to point out that the R3O designation for the Model 12 was likely not a mistake. It was not unusual for impressed civilian aircraft of related designs to be designated under the same type designation. The practice was most common in the USAAF, with some examples being the C-41 and C-41A, UC-70 and UC-70B, UC-77/A and UC-77B/C/D, and the L-4Grasshopper series. - ZLEAT\C04:12, 2 August 2022 (UTC)[reply]
ZLEA Good point, I removed the footnote. For what it's worth, I was basing it on a statement in the military variants section of the Model 12 article. However, it doesn't technically say it's a mistake – just "anomalous".
I should have known better since I actually made a post on WIX the other day on just that subject. Plus, the fact that the Model 12 was coded as a "-2" meant they were aware of the reuse. –Noha307 (talk) 04:26, 2 August 2022 (UTC)[reply]
I almost forgot, I came across a graphic comparing the silhouettes of the Model 10, 12, 14 and 18 in an issue of Aeroplane Spotter the other day. I was actually planning on making a comparison (inspired by the giant planes overlay) of the variants (along with a few other aircraft) if I could find the three-view drawings. Unfortunately, the images in the article were a bit too small to use. –Noha307 (talk) 00:21, 5 August 2022 (UTC)[reply]