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An American rotary lawnmower mechanic (b. 1927) when queried as to the first rotary mower he knew of - produced a picture of a machine mass produced around 1939 which originally used a Ford Model A or B electric starter motor turned vertically with a steel disc attached to the output shaft having common sickle bar trapezoidal blades riveted upon it.
A rotary cutter is a tool generally used by quilters to cut fabric.It consists of a handle with a circular blade that rotates, thus the tool's name. Rotary cutter blades are very sharp, can be resharpened, and are available in different sizes: usually smaller blades are used to cut small curves, while larger blades are used to cut to straight lines and broad curves.
The general blade size range is from 15 to 21 cm (6 to 8 in). Kirit-suke — A large hybrid with the length of yanagi-ba and the blade height and profile of usuba with an angled tip as a compromise. It requires great knife control because of the height, length, and flatness. The general blade size range is from 24 cm (9 in) to 30 cm (12 in).
Fiskars (Swedish; Finnish: Fiskari) is a village, now part of the town of Raseborg, in western Uusimaa, Finland. The village is the site of the former Fiskars Bruk, which was founded in 1649 and gave rise to the company Fiskars. The most notable architectural attraction of Fiskars is a mansion designed in 1818 by Italian-born architect Charles ...
A small rotary hoe for domestic gardens was known by the trademark Rototiller and another, made by the Howard Group, who produced a range of rotary tillers, was known as the Rotavator. Rototiller The small rototiller is typically propelled by a 1–5 hp (1–4 kW) petrol engine rotating the tines, some have powered wheels, though they may have ...
These were angled upwards when the craft was on the ground, creating a cyclic variation in the blades' angle of attack or pitch when the craft was moving forwards. This cyclic variation induced a radial lifting component to the blades, when in the horizontal segment of rotation, which was intended to augment the wing lift. [ 1 ]