Before I try and scratch build it, anyone know of an O Gauge/1:48 PRR F22 30ft (gun car) flat car

Rich Yoder.

http://www.richyodermodels.com...c_co_f22_reserve.htm

These are beautiful models, albeit expensive.  He's sold out, but they come up in the secoday market every so often

Also, someone printed one in G Scale.  Maybe you can get it in O?

@John Sethian posted:

Rich Yoder.

http://www.richyodermodels.com...c_co_f22_reserve.htm

He's sold out, but they come up in the secoday market every so often

Note that the Rich Yoder cars were made in 2-Rail only, and they a spectacular. The 3 cars "set" with the naval gun tube, require VERY broad curves.

Maybe look at what Rameesh Bishop(sp) has to offer. He makes truly awesome military equipment on flatcars....he might have what you want, albeit he sells completely finished product. Good luck and after you finish,  post a pic...

My application is not as a gun car.  I need a short flat car to use as an idler to load and off load a railroad float barge.  Time period is post WWII so repurposing one of the 55 retired between 1952 and 1953 as a handle for my float would be within the realms of reason.

How about 'bash one by cutting the center out of a longer flat?

@Rob Johnston posted:

My application is not as a gun car.  I need a short flat car to use as an idler to load and off load a railroad float barge.  Time period is post WWII so repurposing one of the 55 retired between 1952 and 1953 as a handle for my float would be within the realms of reason.

Is the MTH Cannon car too short for you?

It could, its 27 scale feet lon (7.75*4), but it goes against my old HO rivet counter instincts.  O course it was the rivet counter instincts that caused me to go to O Gauge, more whimsy less anal compulsive: