It is gray and subdued, an understated exterior for a smooth custom homebuilt firmly rooted in the plans of the legendary Marcel Jurca. But the Sperocco that visited AirVenture Oshkosh 2021 reveals a number of structural and aerodynamic touches applied by owner/builder Lowell Manary, EAA Lifetime 52692.

The Sperocco is all wood, save for aluminum wheel wells and compound curve fairings made with composites, Lowell said. After researching aerodynamics, he chose the Riblett airfoil for his airplane.