tourist

Hi everyone, some P-51d scale drawings show what looks like a small whip antenna a little further aft of the tailwheel. I thought this was a mistake since I had never heard about it, however, close inspection of many WWII photos proved that I didn't know as much as I thought I did. At least half of the Mustangs (including earlier versions) appear to have this "antenna". Could anyone tell more about it? Also, I'd like build a 1/32 p-51k and was wondering if someone knew where to find an Aeroproduct propeller. Thanks.