27.10.16

ON A RUSSIAN WORKBENCH.

This video, probably from somewhere in Russia, probably in a scale smaller than O, is another effort to build a model of the Andreyev 4-14-4.  It's interesting that the builder painted the wheels and motion before assembling the chassis.



This mechanism has two gearboxes, which is an interesting way to relieve stresses on the connecting rods, although the motor now has to turn two worm gears.  There's still some hesitation at the ends of the strokes, something I've been working with as well.

The radius rod is mounted in neutral, which makes the task of rigging the combination lever to crosshead and valve stem less challenging.

Let's wish the builder continued success.

No comments: