Ridge lift

Ana kirkirar ɗagawa (ko ɗagawa mai gangara) lokacin da iska ta buge wani cikas, yawanci dutsen dutse ko dutse, wanda yake da girma kuma yana da tsayi don karkatar da iska sama.

Idan iska ta isa, ɗagawar tudun yana ba da isasshen ƙarfi sama ga masu sauka, masu sauka da tsuntsaye don kasancewa a cikin iska na dogon lokaci ko tafiya mai nisa ta hanyar 'Ridge soaring'. Kodayake Jiragen sama mara ƙarfi yawanci yana saukowa ta cikin iska, za su hau idan iska da ke kewaye da su tana tashi da sauri fiye da yawan nutsewarsu. Masu sha'awar samfurin jirgin sama suna magana ne game da wannan dabarar a matsayin "gliding" ko "sloping".

Orville Wright ya yi amfani da ɗagawa, ya kafa rikodin tsawon minti 11 a cikin 1911. Koyaya wasan tashi ya fara ne a Jamus bayan Yaƙin Duniya na farko . A cikin 1921, Dokta Wolfgang Klemperer ya karya rikodin Wright Brothers na 1911 tare da jirgin minti 13. A shekara ta 1922, Arthur Martens ya zama matukin jirgi na farko da ya yi amfani da updraft da ke tashi tare da gangaren dutse don zama a sama na dogon lokaci, tare da jirgin sama sama sama da awa daya.

 Abubuwan da ake buƙata 
Ana haifar da ɗagawa lokacin da iska ta hura a kan tudu, tudu, escarpment ko raƙuman teku, wanda ke sa iska ta tashi. A cikin ilimin yanayi wannan an san shi da ɗagawa na orographic. Iska tana haifar da yankin iska mai tashi kai tsaye sama da gangaren, wanda zai iya fadada wani nesa sama da waje daga fuskarsa saboda iskar iska tana bin tsarin sama na tudun. Koyaya, a kusa da tsaunuka masu tsaye, yawanci akwai yanki na rikici tare da iska mai saukowa kusa da gindin dutsen. A cikin iska na tudun, raƙuman ruwa na iya samuwa; waɗannan kuma ana amfani da su ta hanyar matukan jirgi don samun tsawo, amma wannan bai kamata a rikita shi da ɗaga gangara ba.

Kusa da gangara maimakon tsaunuka masu tsaye, sau da yawa ana samun mafi ƙarfin ɗagawa a cikin hanyar jirgin da ke haɗuwa da layin tunanin da ke fitowa a kusurwoyi madaidaiciya daga gangaren.

Tsawon tsaunuka irin su waɗanda aka samo a cikin Ridge-and-valley Appalachians a Amurka, New Zealand, da Chile an yi amfani da su ta hanyar matukan jirgi don tashi sama da kilomita dubu a cikin jirgin guda. Tsuntsaye, kamar tsuntsayen teku da yawa (musamman albatross) da raptors, suma suna amfani da gangara ta wannan hanyar.

 Dubi kuma 

 Gliding - Ayyukan nishaɗi da wasanni na iska
 Hang gliding - Wasan motsa jiki mara ƙarfi
 Paragliding - Tashi tare da paraglider
 Radio-controlled glider - Nau'in jirgin sama mai sarrafa rediyo
 Controllable slope soaring - Nau'in gangara inda aka yi gangara don bin walkalong glider
 Orographic lift - Jirgin iska ya tilasta sama yayin da yake motsawa a kan tudu mai tasowa
 Dynamic soaring - Hanyar tashi
 Thermal - Ginshiƙi na iska mai tashi a cikin ƙananan sararin samaniya
 Lee wave - Saurin motsi na sararin samaniya

 Manazarta