Gearbox Madness : illustrates the construction of different gearbox types. How many modellers do you know that make a closed gearbox for an Adams B4 only to find that the motor intended for use with the gearbox has packed in, a modification is made to the gearbox to later find that the unit will not fit in the intended B4 without surgery to the boiler, a start is then made on a cradle type gearbox only to find the same, the end solution on the B4 can be viewed in another blog. This blog follows the construction of a simple enclosed gear box, an open cradle type gearbox both with a P4 50:1 gear wheel and a 2BA screw for the worm, the third gearbox is an open frame type gearbox utilising gears extracted from some old sigma camera lenses.
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