Gents,

The man on the picture?


The second information step is a difference:
De man on the picture of post 806 was involved on (in?) a special way with the planes of real dimensions.
While Ed was a machinist (so engine specialist!) and did have to do all research with the Orion and Taurusses while real flying the planes our man of the picture was aerodynamic specialist and for that reason also familiar with the wind tunnel.
In the future you will be surprised to hear the location of that wind tunnel.
(Replay: Ed also did make a study of the real airplanes in the past as we all know.)

Cees


Edit, a wind tunnel isn't always needed to show important details!