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Piatti Scooters
Avro[1] motorcycles were produced by aviation pioneer and aircraft builder A. V. Roe and
Co from 1905 to 1926 and in 1957. Avro, perhaps best remembered for the Lancaster bomber of WWII, became part of the Hawker Siddeley group. (See also Harry Hawker)
1905 A. V. Roe disliked motorcycling without weather protection and proposed
a motorcycle with extra-large mudguards.
1913 A design was produced whereby the rider sat low, with legs either side of the
Douglas flat-twin engine. There were to be Druid forks, wheel steering, rear
suspension, a 72-inch/183cm wheelbase and outrigger wheels to stabilise the machine when it was stationary. Little more was heard of the
design for several years.
1921 Harper Runabout was a motorcycle produced from 1921 to 1924
to a design by R. O. Harper of Salford. The machine was a three-wheeled
scooter of a very practical runabout design. It had a single front wheel
steered by long bars with the rider seated above and between the two rear
wheels. A 269cc two-stroke Villiers
engine drove one of the rear wheels by chain, through a three-speed gear.
Enclosure panels provided ample protection and the machine performed well
throughout a Scottish Six Days Trial. Although the Harper Runabout
was thought to provide everything a discerning purchaser might require,
its unconventional appearance, in the form of a motorised bath-chair, did
nothing for its popularity. It is though that its design, together with
a downturn in spending power, following the First World War, contributed
to its failure.
1922 A machine was built called the Avro Mobile. It had low seating
and, to begin with, was fully enclosed. It was fitted with a 349cc Barr
and Stroud engine, three-speed Albion
gearbox and all-chain drive. The frame was made of sheet steel formed into
a channel section, with sprung front and rear suspension. It had hub-centre
steering, 12-inch disc wheels and drum brakes. Although the machine started
out with a completely enclosed body, this was soon revised to resemble
a scooter-type with bonnet and front screen and a seat and tail behind.
Under the hinged tail-panel lid was a storage space with the tools carried
inside the lid.
1926 The machine was road tested and the designer, who was by now knighted,
introduced the Ro-Monocar. This was fitted with a 343cc Villiers
engine and three-speed gearbox with shaft and worm to the rear wheel. Once
again it was almost fully enclosed and resembled the Mobile.
Later, it was to be renamed the Saro Runabout, to promote the new
Saunders-Roe company.
Later still came the Arro model in similar form, but none of these
really caught on.
1957 Around this time the Avle Bicar appeared. This had a Velocette
192cc LE engine, gearbox and rear axle in the same format. Yet again,
only one was constructed.
