H0 underframe for Ohio Interurban freight trailers

The underframe is prepared for Kadee trucks and self made radial couplers. The bogie and coupler supports are printed with the frame. Screw holes are pre positioned. Queen posts and truss rod supports are printed also, the four rods must be added made from brass wire, holes are in place as rod anchors.

Unfortunately, I made a small error in the drawing and the bogie pedestal on the right (under the truck) is missing its rounded center piece. This time, I added it in styrene. The new version would be improved.

A 10x12 brake cylinder is positioned near the center. According to Charlie Pitts, a cylinder with an auxiliar reservoir would be more suitable. I will add this part also in the updated version.

Once the last improvements made, this underframe could be used for any version of 38' Ohio boxcars with arched roofs or railraod roofs.

Resin prints needs some cleanup

The small dots (circled red) are 3D printing residues

Resin printing produces a ready assembled body made of complex forms.

If you make abstraction of the time spent to draw the 3D file - this can take entire days or weeks - the printed shell out of the shipping box is immediatly superdetailed. But it is not ready to paint or to roll.

The resin printing process leaves remnants like this small "dots" who may look sometimes as rivets, but in fact they are not. The shell needs some cleanup before painting. For this, you need a cutting knife, fine sandpaper and a fiber glass brush. The dots are easy to cut, you must only take care not to cut away details.

Resin Print of Ohio Electric Box Car

Quicker than expected i.materialise shipped the resin print of the Ohio Electric Freight Trailer. Here is the car directly out of the shipping box, disposed on Kadee trucks.  The "kit" is split in two  parts, the carbody and the underframe with bogie pedestals and a brake cylinder.

The car parts

Left : With End doors. On the right : without

Evi M. made the quality check

CERA freight trailer diagram

CERA interurban box car

Facing a freight boom on their interurban railways in the mid-20ies, Master Mechanics of leading midwestern companies designed a standardized box car.

This car is still known as the CERA trailer, named after the Central Electric Railway Association. Even standardized, this car was built in several variants. Here is the drawing of the two basic versions, with square ends or rounded ends.

Download pdf-file (scale 1:72)

C&LE wooden freight motor

C&LE freight motor, rendering of a future H0 resin print model

Motive power is needed, work is in progress.