The O class tram has always proven a challenge to motorise in HO scale as the open seating compartments above the bogie section makes it difficult to install a standard motor bogie.
In designing this model I decided to use the BullAnt Gozunder bogies in connection with a half floor motor in the centre enclosed section of the tram. To connect the motor to the bogies I have used the Telescoping Cardan Shaft Kit all available from Hollywood Foundry.
In this blog post I will take you through the process of installing this equipment in the 3D printed model tram which you can order from Shapeways.
List of required components:
– 2 x BullAnt Gozunder bogies with a wheelbase of 16.5mm and 7.6mm wheels. More Info
– 1 x Gearbox for 16 Series Motor, 2:1 ratio with flywheel and a 1620 motor. More Info
– 1 x Telescopic Cardan Shaft kit 2″ More Info
Here are the components laid out ready to install. In the top left are the two Gozunder bogies. The bottom left is the chassis model which can be 3D printed from Shapeways. In the bottom right is the shaft kit and in the centre the half floor motor.
The first step is to mount the motor on the chassis. As you can see in the image below the tram body is quite narrow and the motor mount overhangs the chassis.
The mounts can be easily sawn off or cut with a Dremel and filed smooth. Mount the motor on the chassis with either some glue.
Next the bogies can be secured to the chassis.
The bogie at the gearbox end of the motor is very close to the drive shaft. The two black plastic couplers will need to be removed in order for the components to fit as can be seen in the next two photos:
And with the couplers remove and the bogie the correct way round:
We will now install the shaft. Turn the model over and measure the shaft length.
Cut the shaft to length and insert the spring and ends:
The shaft is now ready to insert.
Solder up the wires and insert a decoder if you wish and the model is ready to run.
You can blacken the flywheel if you wish to hide the motor a bit more.