The Martin XB-14 was a re-engined prototype of the B-12 bomber. There's some information on the following websites. One of them says that only one B-14 was built but another says that two were made. http://home.att.net/~jbaugher2/b10.html http://www.csd.uwo.ca/~pettypi/elevon/gustin_military/db/us/B14MARTI.html http://home.att.net/~jbaugher2/b14.html The website below has a drawing of a B-12. http://www.daveswarbirds.com/usplanes/aircraft/b-10_b12.htm This one has a couple of pictures of a preserved B-10 http://www.shanaberger.com/B-10.htm The B-12 was in a development of the B-10, the USAAC's first all metal monoplane bomber. It was very advanced when introduced but was obsolete by 1941, when it was used by the Dutch East Indies Air Force against the Japanese. It had been taken out of US service by then. The Dutch called it by the manufacturer's name of Martin 139.
Thanks, I read that there was a unit the 470th Bombardment group that used them as trainers. It must be a typo and the site manager meant to say B-17.
As noted above, the B-14 was a modification of the Martin B-10/B-12 series. It was only an engine modification, having two YR-1830-9 Twin Wasp engines of 950 HP each. Only one was built, as XB-14, with serial number 33-162. So I think you are right that the squadron wasn't using them for trainers-- must have been a typo. Doc
