These are parts to assemble a working bomb bay (6 500lbers) for the HK/Sonic 1875mm span B-17. Units are in inches (sorry, I'm a hold-out on converting fully to the metric system!) You will need 1 Hi-tec HS-55 servos and one Eflite S-75 servo to actuate. (they run reverse of one another). Follow the build thread at: https://www.rcgroups.com/forums/showthread.php?2865454-Hobby-King-1875mm-B-17-FPV-camera-ship.
in the picture of the parts, the inner and outer, left and right fin guides are not shown, but included in the print files. They were deemed necessary after some drop tests.
video here: https://www.youtube.com/watch?v=ZmFyd82mVpA
update, I added a screenshot of the additional walls I made to guide the bombs out straight. they are in red in the first picture