The USN's second plane, the 1912 patrol amphibian Curtiss A-2, or OWL, was converted from the 1911 Model E landplane. With two seats and 50hp Curtiss pusher engine, later replaced by 60hp V-8, it was unofficially dubbed OWL for "Over Water and Land" when experimental wheels were added.

 

Curtiss A-2

 

With a modified with cabin enclosure, it was re-designated E-1 in Sept 1913, then AX-1 in March 1914.

 

The sole example crashed on 27 November 1915 after 91 flights and was scrapped.

 

Replica:
Coolbaugh Curtiss-Ely 1911