Tusa or not Tusa?
Ah, Ken, there lies a problem. My original image, not from the internet but a very detailed ext, refers to it being the IMPA RR-11. One built only. It says the Tusa was a follow-on from the shown machine, which was the prototype only. Therefore, in my mind, not the Tusa. RR
Edit: I just checked. There was one RR-11 (shown). It was built and first flown in 1942 and designer by Alfredo Davinz Ferrer. Built of Spruce and Birch there was just one. Later IMPA-designed the Tu-Sa, contracted in 1943 with a stipulated 25 aircraft production run. The RR-11 was powered by a Lycoming O-145-B2.