On This Day

Tuesday 23rd April 1946

74 years ago

The Vespa scooter was granted a patent for a "motorcycle of a rational complexity of organs and elements combined with a frame with mudguards and a casing covering the whole mechanical part", that started the line of iconic Vespa scooters into production, starting with the Vespa 98. The basic patented design allowed a series of features to be deployed on the spar-frame that would later allow quick development of new models. The original Vespa featured a rear pillion seat for a passenger, or optionally a storage compartment. The original front protection "shield" was a flat piece of aero metal; later, this developed into a twin skin to allow additional storage behind the front shield, similar to the glove compartment in a car. The fuel cap was located underneath the (hinged) seat, which saved the cost of an additional lock on the fuel cap or need for additional metal work on the smooth skin. The scooter had rigid rear suspension and small 8-inch (200 mm) wheels that allowed a compact design and plenty of room for the rider's legs. The Vespa's enclosed, horizontally mounted 98 cc two-stroke engine acted directly on the rear drive wheel through a three-speed transmission. The twistgrip-controlled gear change involved a system of rods. The early engine had no forced-air cooling, but fan blades were soon attached to the magneto-flywheel (which houses the points and generates electricity for accessories and for the engine's spark) to push air over the cylinder's cooling fins. The modern Vespa engine is still cooled this way.