orffyre measurements page

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First wheel - Gera

Diameter = 4.6 feet
Thickness = about 4 inches
Speed = over 50 RPM unloaded
Rotation = uni-directional, required restraint when not in use
Axle = unknown
Sound = unknown
Power = unknown

* size in ell units: reported diameter = 2.5 ell = 4.6 feet; reported thickness = 4 Leipzeg inches = 3.7 inches *

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Second wheel - Draschwitz

Diameter = 9.3 feet
Thickness = 6 inches
Speed = over 50 RPM unloaded
Rotation = uni-directional, required restraint when not in use
Axle = 6 inches diameter (probable diameter = 1/4 ell = 5.6 inches)
Sound = loud noise
Power = unknown

* size in ell units: reported diameter = 5 ell = 9.3 feet; probable thickness = 1/4 ell = 5.6 inches *

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Third wheel - Merseburg

Diameter = 12 feet
Thickness = 11.15 inches
Speed = 40 RPM or more
Rotation = dual-directional, required gentle push start in either direction
Axle = 6 inches diameter (probable diameter = 1/4 ell = 5.6 inches)
Sound = banging noise at descending side of wheel
Power = estimates range from 20 Watts to 100 Watts

* size in ell units: reported diameter = 6 ells = 12 feet; reported thickness = 1/2 ell = 11.15 inches *

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Fourth wheel - Kassel (Weissenstein Castle)

Diameter = 12 feet
Thickness = 18 inches
Speed = 26 RPM unloaded - 20 RPM under water screw load
Rotation = dual-directional, required gentle push start in either direction
Axle = 8 inches diameter (probable diameter = 1/3 ell = 7.4 inches)
Sound = about 8 bangs per revolution at descending side of wheel
Power = estimates range from 25 Watts to 125 Watts

* size in ell units: reported diameter = 6 ells = 12 feet; probable thickness = 3/4 ell = 16.7 inches *

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