US Navy OS-117 Outline Specification (S-2 Tracker rivals)

[Pioneer]

3-view drawing of Martin Model 225

(Source: The Greatest Planes That Never Were https://www.facebook.com/share/p/epxgzzkzmm8FaXG4/?mibextid=oFDknk)

Regards
Pioneer

 

[Arjen]

These are all summarized for your convenience in my S2F monograph: http://www.ginterbooks.com/NAVAL/NF101.htm

And the engines in the Cessna proposal were R-1820s. Two R-2800s would have been way too much power. The triple-fin tail was to address the hangar overhead clearance and single-engine low-speed requirements.

Me having my priorities badly wrong, I belatedly bought a copy. I am well chuffed with it.