Designed by Walter H. Barling. Also known as Barling XNBL-1.
US Army Air Service number 64215. Also McCook Field Project Number P303.
Only one built
Six 420 hp Liberty 12-As
First flight Aug 22, 1923, last flight 1925, scrapped 1928.
Aeroplane Photo Supply No. 1974
Aeroplane Photo Supply No. 2920
