I LOVE A MYSTERY!! Jack, Doc and Reggie, I can remember their names but can't remember this particular airplane. Can you remember their names? I have been looking through the many old mags from that era, so far the only thing that resembles the mystery plane is the Conquistador. Richard
If it was similar to the Conquistador, then maybe it had elliptical or near elliptical wings. Also, if you remember for sure it had a fuselage mounted wire gear, flaps, and inverted engine, bubble canopy like the Conquistador, all of that will narrow the choices down a lot.
Charles Mackey had several that might fall into this list, but none had a wire fuselage mounted gear.
Bob Palmer's Pow Wow, but had straight wings, tapered flaps, rounded tips, fuselage mounted sheet metal gear, turtle deck behind cockpit. (This was Palmer's design after his Smoothie, Mars, and Venus but before his Thunderbird.)
Sleekster by Earl Clayton - elliptical wing with flaps, fuselage mounted sheet metal gear. A really nice looking model very similar to the Conquistador.
Feno by Ted Goyet - straight wing with rounded TE flaps and tips, fuselage mounted wire gear
Black Hawk by Walt Pyron - really a semiscale P-40Q, tapered wing with rounded tips. Fuselage mounted wire gear.
Phoenician by Claire Siverling - almost a semiscale P-51, straight tapered wings with rounded tips, fuselage mounted sheet metal gear.
Lady Luck by Paul Del Gatto - tapered wings, rounded tips, fuselage mounted sheet metal gear.
Skylark by Ed Southwick - tapered wings, fuselage mounted sheet metal gear.
Sky Devil by Larry Scarinzi - tapered wing, rounded tips, no flaps, fuselage mounted wire gear.
Gambler by Frank McMillan, straight wing, rounded tips, tapered flaps, fuselage mounted wire gear.
That is about it for designs between 1952 and 1964.
There really are not any OTS designs (prior to 1952) that fill the criteria for your "near Conquistador" described above except for Palmer's Smoothie (turtle deck behind cockpit) and Palmers Mars (which you would remember with a trike gear and twin rudders).
There are a few stunt designs that did not get into the Tom Morris book on Classic designs, but none of them come close to the "near Conquistador" criteria listed above.
Keith