Aviation dictionary. 2014.
thermal — thermally, adv. /therr meuhl/, adj. 1. Also, thermic. of, pertaining to, or caused by heat or temperature: thermal capacity. 2. of, pertaining to, or of the nature of thermae: thermal waters. 3. designed to aid in or promote the retention of body … Universalium
updraft and downdraft — ▪ meteorology in meteorology, upward moving and downward moving air currents, respectively, that are due to several causes. Local daytime heating of the ground causes surface air to become much warmer than the air above, and, because warmer … Universalium
Solar updraft tower — This article is about a type of power plant. For other uses, see Solar tower (disambiguation). Schematic presentation of a Solar updraft tower The solar updraft tower is a renewable energy power plant. It combines the chimney effect, the… … Wikipedia
Solar thermal energy — Solar thermal system for water heating in Santorini, Greece … Wikipedia
Cloud suck — Towering cumulus clouds are often associated with cloud suck Cloud suck is a phenomenon commonly known in paragliding and hang gliding where pilots experience significant lift due to a thermal under the base of cumulus clouds, especially towering … Wikipedia
Lee waves — In meteorology, lee waves, are atmospheric standing waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the … Wikipedia
Jan Wnęk — (b. 1828 in Kaczówka July 10, 1869 in Odporyszów, Austria Hungary).Jan Wnek is believed to have been an aviation pioneer; He was illiterate but known to be very intelligent. Trained as a carpenter, this Polish peasant had a keen sense of detail… … Wikipedia
Barau's Petrel — Taxobox name = Barau s Petrel status = EN | status system = IUCN3.1 trend = down regnum = Animalia phylum = Chordata classis = Aves ordo = Procellariiformes familia = Procellariidae genus = Pterodroma species = P. baraui binomial = Pterodroma… … Wikipedia
Kettle (birds) — A kettle is a term that birdwatchers use to describe a group of birds wheeling and circling in the air. The kettle may be composed of several different species at the same time. Nature photographer M. Timothy O Keefe theorizes that the word… … Wikipedia
Lee wave — The wind flows towards a mountain and produces a first oscillation (A) followed by more waves. the following waves will have lower amplitude because of the natural damping. Lenticular clouds stuck on top of the flow (A) and (B) will appear… … Wikipedia
