Issues 115 and 116 are available.
We begin to build the gearbox.

The wood rollers A and B will serve as winches for the trolley and the hook, respectively.
The worms C and D will drive the rotation of the boom and the movement of the bogies, respectively.
We also add two pulleys (E) which will guide the ropes of the trolley.

In the magazines :
- History of Meccano : Spirograph (part 3) / Meccano special editions /
Kemex and
Elektron- History of Meccano models :
Gantry cranes in the 1950's- Other models