Boeing PW-9/FB - version overview:
XPW-9 - prototypes
PW-9 - serial version according to the third prototype
PW-9A - second series, engine D-12C
PW-9B - machine with D-12D engine
PW-9C - series according to PW-9B, engine D-12D and minor modifications
PW-9D - series with new cooler and rudder
AT-3 - PW-9A completed as a training machine with Wright Model E engine
XP-4 - PW-9 experimentally equipped with Packard engine
XP-7 - PW-9D experimentally equipped with Curtiss Conqueror engine
FB-1 - podoba PW-9 for the Navy
FB-2 - FB-1 with catch hook
FB-3 - úprava s motorem Packard
FB-4 - float version FB-1, Wright engine
FB-5 - series of wheel and float machines with Packard engines
FB-6 - rebuilt FB-4 with wheel chassis and Pratt engine & amp; Whitney
Source:
http://www.aerofiles.com/_boe2.html
www.americancombatplanes.com
XPW-9 - prototypes
PW-9 - serial version according to the third prototype
PW-9A - second series, engine D-12C
PW-9B - machine with D-12D engine
PW-9C - series according to PW-9B, engine D-12D and minor modifications
PW-9D - series with new cooler and rudder
AT-3 - PW-9A completed as a training machine with Wright Model E engine
XP-4 - PW-9 experimentally equipped with Packard engine
XP-7 - PW-9D experimentally equipped with Curtiss Conqueror engine
FB-1 - podoba PW-9 for the Navy
FB-2 - FB-1 with catch hook
FB-3 - úprava s motorem Packard
FB-4 - float version FB-1, Wright engine
FB-5 - series of wheel and float machines with Packard engines
FB-6 - rebuilt FB-4 with wheel chassis and Pratt engine & amp; Whitney
Source:
http://www.aerofiles.com/_boe2.html
www.americancombatplanes.com