Will some patriot please , please leak Trump ' s tax filings ? <| sep |> Hey come on now <| sep |> Thanks . I ' d very happy pleased if you did rate me , though . Can you give me some suggestions on how to improve ? <| sep |> Fun fact there are currently only two airworthy B 24 s as well an Amodel and a Jmodel . All the other surviving examples are on static display . Some of them are in a good enough condition to be made airworthy if funds are available . There weren ' t as many B 29 s built to begin with just under 4 , 000 aircraft , while 12 , 730 B 17 s and 19 , 256 B 24 s left their respective factories . When the war ended , most of the B 29 s still on the production lines were scrapped , while completed aircraft were put in storage . However , many of those were damaged by moisture buildup due to improper preservation and had to be scrapped as well . Furthermore , none were released onto the civilian market , like many B 17 s were . The B 17 was a rugged and reliable aircraft and served in many roles until long after the war . That also preserved a lot of them . Another reason is that the B 29 is a complex aircraft . Its original engines , Wright R 335057 s , were notorious for their cooling problems and resulting unreliability ' Fifi ', one of the airworthy B 29 s , has been fitted with custombuilt R 3350 s based on later variants , after engine trouble grounded her for some time .