Eric, I think you have this right. The P-63 appeared to be following two other fighters (P-51’s?) but flew a much wider turn than the other two which caused him to converge on the B-17. Unfortunately, he was somewhat belly up to the B-17 meaning he likely couldn’t see it. In some ways, I think the mechanics of this accident are probably similar to the landing pattern midair that occurred and North Las Vegas in July.