kach22i -- "Corvair Testudo" FWIW
I wish the illustrations were larger than 800x1198, the text is hard to decipher. What might be the Mathis 300(?) is a lot like the contemporary Corbin Sparrow.
Based on the shape labeled 'Csp: 0,2' I did this for one of the gravity racer threads:
It also validates my old VW bus design:
