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Clear ice forms by slow freezing of supercooled water. Clear ice is typically transparent and homogeneous. Its amorphous and dense structure makes it adhesive. Soft and hard rime are less dense than clear ice and less adhesive, thus generally cause less damage. Glaze ice is similar in appearance to clear ice, however it is the result of a ...
Soft rime has a density between a quarter and two thirds that of pure ice, [95] due to a high proportion of trapped air, which also makes soft rime appear white. Hard rime is denser, more transparent, and more likely to appear on ships and aircraft. [96] [97] Cold wind specifically causes what is known as advection frost when it collides with ...
[4] [13] Crossing into Canada, the headwinds grew stronger still, and a load of hard rime ice and clear ice was visible on the wings. Though the B-29s had been delivered to the war front complete with deicing equipment, such gear had been removed months before to reduce weight and therefore increase combat range and speed. [ 2 ]
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Rime ice is rough and opaque, formed by supercooled drops rapidly freezing on impact. Forming mostly along an airfoil 's stagnation point , it generally conforms to the shape of the airfoil. Mixed ice is a combination of clear and rime ice, having both properties.
Ice formations come in many different shapes, including pancake ice, rime ice, ice rings, ice disks, turquoise ice, sea-spray ice, ice spikes, ice donuts, ice pushes, ice bells and chandelier ice.
Hard rime is formed when subcooled droplets of fog or low-level stratus cloud freeze on the windward (wind-facing) side of tree branches, buildings, or any other solid objects. This takes place usually with moderate wind speeds from 3 to 6 m/s (9.8 to 19.7 ft/s) and air temperatures between −2 and −8 °C (28 and 18 °F).
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