The Big Wheel built from the 1927 instruction manual shown in the previous post, has been built following the printed instructions as closely as possible. Looking at it, bearing in mind its vintage, it was screaming out to be steam powered by a 1929 vertical boiler engine.
|Tatty, yes, but it goes well and has that well used look about it|
|An overhead view shows the joining rods and gearing|
|Underside showing the third girder|
|The clutch assembly and final drive shaft|
I digress (again). The clutch is a simple affair. a gear wheel, as it stands now is a 50t gear, is secured into one end of a socket coupling. A 1 inch pulley, fitted with a 'rubber' ring is secured in the other end of the coupling. This runs freely on the output shaft. A bush wheel is secured to the output shaft. A three-hole coupling is fitted with two, 1 inch rods and is tightened against a couple of nuts that have been locked together on a ½ inch bolt so it is free to rotate in the centre hole of a 3½ inch perforated strip. This strip pivots on a small triangular plate, again via a bolt, lock nutted through the end hole of the 3½ inch perforated strip. The bush wheel is locked to the output shaft in such a position that the gear wheel is still in mesh with the pinion when the pulley and rubber ring are hard against it. The lever is biased against the bush wheel with the aid of a tension spring.
|The clutch assembly and lever|
|Another view of the clutch assembly|
|Sue is busy making and fitting more gondolas|