[Cuccos19]

Tater718 gave an exact explonation. We also know now that P-38L and some late Mustangs (sorry, I don't know so much about P-51s to tell the exact model), but why??? Passive warning radar had no real use on an agile ww2 fighter, even not on an agile ww2 day fighter. Enemy aircrafts - Bf-109s, Fw-190, Zeros, Franks, Tonys, etc. didn't have any search radar, what this tail warning radar could detect. I hardly believe that some German twin-engined nightfighter could slip on the six of a Lightning/Mustang during a daylight operation. I know that some Fw-190s (maybe A-6 subtypes?) used at Wilde Sau squadrons fitted with search radar and a lot of antennas on the wing and on the fuselage (look like a hedgehog), but they were uncommon and I think Americans wouldn't install some insturment in large scale because of this irrelevant threat.