Make Pt1055
Electric miniature mono-railway Modern Mechanix, Feb, 1931.

IT IS a well known fact among experimenters that when a whirling gyroscope is set in an upright or inclined position it will not change unless some strong exterior force is applied. Due to this peculiar quality, which is known as the precessive effect, the gyroscope can be utilized in the construction of many scientific instruments and practical devices which are used in every day life.

One of the most important uses to which the gyroscope is put is that of keeping a mono-rail train in an upright position as it speeds along on its single track. The most practical and outstanding railway of this kind is known as the Brennan Mono-railway, which is used in Ireland.

An interesting and instructive toy mono-railway working on the same principle as its big brother can be easily made by any home craftsman out of a few Meccano parts, an old six-volt toy motor, a bell transformer, a piece of No. 20 gauge sheet iron, an old sewing machine fly wheel, and some No. 14 bare copper wire.