hoar frost


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hoar frost

A type of icing that occurs in clear air on a surface whose temperature falls below the frost point of the air in contact with it. The water vapor condenses into white crystalline coating of ice that is usually of a feathery nature. This type of clear air icing may occur on an aircraft parked on ground or in air when it enters into a region where the air is warm and moist and after the aircraft has flown in a region of subzero temperature.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Hoar frost, I thought to myself, while having no idea what that actually meant.
An example of hoar frost on an [LN.sub.2] frozen mound is shown in Fig.
Sura 2:57 in the Qur'an says, "We gave you the shade of clouds and sent down to you manna and quails, saying 'Eat of the good things We have provided for you'." Chapter 16 of the book of Exodus in the Bible also mentions the quail, a small, ground-dwelling bird often found around patches of vegetation in the desert, and gives detailed descriptions of the manna, which appeared on the ground once the morning sun had dried up the dew, "...upon the face of the wilderness (lay) a small round thing, small as the hoar frost upon the ground." Further on in the same chapter it is described as white like coriander seed, and tasting like wafers made with honey.
Erica and Bethany each won a PS50 gift voucher, whilst a special award was made to Peter Rafferty for his image of hoar frost at Southfields Farm, Coleshill (shown above), which the Mayor chose as the cover for her 2012 Christmas card.
REDCAR: 2.15 Lucy Minaj, 2.50 Legal Bond, 3.25 Hoar Frost, 4.00 Kung Hei Fat Choy, 4.35 Cottam Donny, 5.05 No Quarter, 5.40 Maggie Mey, 6.10 Green Warrior.
Above a certain level, the grass was covered with a thick hoar frost.
North Colin Russell Hoar Frost (5.15 Southwell, nap) Sole win came last June but has run several creditable races this season, including on this track.
behold, upon the face of the wilderness there lay a small round thing, as small as the hoar frost on the ground." The prophet, light emanating from his head, acknowledged the miracle, along with the figure on the right, possibly his brother Aaron.
The phrase spoke of an "exhalation" from certain rivers, which "spread around like a hoar frost." Coleridge's version, a couplet in "The Rime of the Ancient Mariner," reads: "[The sun's] beams bemocked the sultry main / Like April hoar-frost spread." The echo is conjectural, but the repeated words "hoarfrost" and "spread" would seem to clinch the accuracy of Wolfe's discovery.
McCoy is fancied to kick off the meeting with a win on Hoar Frost (2.00).
NAOMI MATTHEW: 2.10 Freedom Fire, 2.40 Hoar Frost, 3.10 Mutual Respect, 3.40 Marblehead, 4.10 Mad Jack Duncan, 4.40 Erdeli, WORCESTER: GAZETTE BET: 8.40 Prophete de Guye.