This achingly beautiful design study by McDD dates from the 1970s. Shades of the XP-67 Moonbat? It’s also reminiscent of the Bugatti 100P. I love this.

Specifications (taken on faith)
Length : 44.6 ft
Span: 56.5 ft
Take-off weight: 14,410lb
Empty weight: 9,960 lb
Maximum fuel-load : 3,415 lb
Wing area: 400 sq ft

Take-off thrust/weight ratio: 0.44
Quiet speed, 2500 ft altitude: 112 kn
Max speed, 2500 ft altitude: 400 kn