CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '913488b09898fdfc',cH: 'aUZp8ZANSyb66TrzS61ebAXz5b5yahdMB2VGFKpbNjw-1739782269-1.2.1.1-KrU45.JlcEy1x1kS2K6buj0XGtcTRz9vwndu44BLJ6xzaXz905tEXx3nfkMb3mbP',cUPMDTk: "\/abstracts\/search?q=landing%20gear&__cf_chl_tk=vkVztHdVeXTnvi26.J8R848QnW3AV.yZxL37NlfGlDg-1739782269-1.0.1.1-L4YGL2EnufEriPIAIsrNMsRxKm5.wt0.X412yY4txoI",cFPWv: 'b',cITimeS: '1739782269',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=landing%20gear&__cf_chl_f_tk=vkVztHdVeXTnvi26.J8R848QnW3AV.yZxL37NlfGlDg-1739782269-1.0.1.1-L4YGL2EnufEriPIAIsrNMsRxKm5.wt0.X412yY4txoI",md: "KKzTfWs_Dz9bMyNTSaOh_uzdfMvenupMnFScLF_D3Zw-1739782269-1.2.1.1-mp7Ja61rFW3x.Jp34t9OhEBNKfx5TeMpf61hNz1uRmXT_uIegPSNsfTDEz_.9md1XtTvRCjD8BhulG_FZBIcs02d0Gg8.KRvitrebYhsAjMu.3hXyexabcia0gZ6xqCcUVHfLd6Q__hI6NtZzmSSq9B530A0UzTuZPi0GWFq9mnZXEB7nHJrD7F2vXODSSnr9rGf12I.LqNCZuRNk5o19EG6xQ9fcQXIiprHlqlpPTo7WJQEdCe4XDci7dKlqTR483_PMUSVb_Qm9TJwaRrBH2aW9A.2QlORb6F_3gKV7ORsoIkTmXJ7DBiabySp0Zp1lfwnkBFrKVcvtzom9fOhH7TSOWlTRu8e_gOoQbk7rj7QmSOG6fcwuM6OLffNGhyXIeVeuP.9cxgXSqld9Um7E1emSDF1XFBOpBhd6Q9Hcm.35e5FE9msGK.LgPx8gbgdofLhA0yg5ry6uKXed7.laufbvHvOVzlVHSX3s_yCF9wP7BgcnQQ9ilCVb3JqOELHbzvrBe9rou3h.jnjR2YCBZVK65FeNDUKAM7mD3FY8qTsmgmkAIzavDnD3Teo3MneMDh7tTi8JLIwwSqGcdCbQI_EeWJYj3eZretFeTdLNoN7y9TrNcqBjJJdw8bkWfyywsrcEjiBWYsAMqkWIYEz6.2gkdJGCsB8eYjluFrDx5ic6BiXamkWdyXb02tA_RcTGVeBEDn.EZ8H3ms7GYj_420WRWTMM1xMT5eJr11vooJaWZe1W1Spa2e1eEd_rhtGagNny9k4DT_sZ3RAheKtoa38qMNRd3l7wjqr0jkXXqRmwFJ7e9e3W7cS68zQ9DYF62xUXOBmFUHXAY.FIDXabd3ztVG7JtJGdvZlBENLBwGiNE8lO5bCJanxKoReecL5SF9m0vpyk.EDLusePLxj16vxywNQBzSPnMWB69U1ymoXfh7R6hGZK7Va4RGHWtvMlBeP4v6s3wYf7O8sHdajTcIYF3784xgUfoGkuOBzNCL5Q43_5Nkwv2.FzsNrvJA6cLLcD5t0iwaHK4Q8DCtGVBQZoqoSxaFZQJDKWOTNDNrQyyyINyTaTHbO3dBEtymlgMPem6WRWiJu4OniskUMOAe5QStwPuPnQ116Bb7eDkqYHizbN6Dmhok7up4AHSpTlIlWDOuQSuqt8XepZKfhHX3faWdzrIYdXjMBgzbuNgIoqnMFPjwyPka.E6_JTh4b7lbHyXiLssfpA1ChfB4nOoamHIdZRJwWpUchyHdxpc7XbGhSqEVzfuIvpKuioDkOzbg30nzYq70viYTgPDz7qvfvQmYRZtjveep7VcaZBYi1KPIvX9Pm_2iaA1TBOjjYTQ53Q3oNZL3hmeCz7MLWVopHF0qxd7W2.17H8lqlmi_dgE24COkDEOPewraenbGZysDQvcdb4B45ZjgOTAhBl2bqqUiuicSWRgy1fjE_HZ1xeLszTF8hUiehso9WKFFtKGfOQf1UmuSaeG7Fq73X5VGdJvbBbmvX_A4s4ozShryfn_qshu0lhQcR7SeWxe8ZB1DtLGwzamEOr3r8.g550ix5J9t25NYcteEg8QgEo7w4fE9pdsxM4QXkmJTqM3zCN7anq0X9pxcGOtu6ALgCJSsfXoXTwC51TnO5UnSJtrDpkD6mAR0IEqXmOtEIOPA8AgYrpLCZzctCmFPs_4W4PDqh_DNoZE10ziz669_txgDHAo8RDXotc5ibimqaHVvhxZJtYumVjdz67gD1Wa7JN6Fco1svFv.cSpmBO_NMZcVyzw2.YDIxz00wRfoKRdks9ONVWCL2DT197pfOTeXQ51NYY2hwNOj4DWFFA0AevT5xKz2mCn.WX7s9gXtaO97GHZqU10_3J0CemdpHGsN6JkVj0WKXFBWbfQTSFUFiSZfJgphUiW84pGHBojOj3SRXJIDAMfxkjKGQs6WBmV0H_lR_ZOhin_LAm0bSHPG_oZo",mdrd: "Hsy6Q5rIws7XiRxpNXhD2OeAsxhxtTEJ6JZ1F2vvsv0-1739782269-1.2.1.1-rdnKoXA1vrriAOj.PXSOR2sNVlzs2Tk51FVa.sABlBw.DOrhAmgrmpZ_mNq0LXsvBBZwXSulwt8EnmwndXHsV6MbGAvHpHB9eO5Om7HRqtk0UHxt2k1rvzLb.ppxLp42s8cTE83ifS_oa.5LcQ3GVuv_Wh1PNtXR9PYLr_Kqz4Mt4VbZLx88weelgc5Pjqqk4tpOh0HsynQCr803xYxw6JvNn4vRR7d5__63ZcmeQn0sUqnicdhRGUHyOhxmHvrw48bMiXrFDH8aLCz.WLqJFYnNDQgRZfKH_A_.xKL_qTj7JfaP9ciqSUrgA1KIhy4qS6SBdaWd5dtVzP0gPVrQLteU5E1H2Q7AcfaB.5giOpgJHFWtyzlraeqdmaX0HIsV_uU0PF44dFDfoHB49uTX_O6s8T4ecTqcv5PPYTbHeuzQ7zaD60DocS94I6gl5aqKz4KwV2Ke_nmLUDeH2iISJ_1xPZvF.Sp6hJVjo_SQlRhuJvYSsfSM1A3aqtgM8P2PzDCd_OWWs476NWZybXw5flbhx5GoAyRwCH6IOlp.xztc_FHAABO.dTybiGbj63WerNQTGhux94zA988WSU3lnFeXZCZHjlqeEakbBZad1BcMuF7sB1z93oeTO5Bx4v9HGtp4WslY_I4DgbKSsjivnY2D6BFopijn45X5Sk_pIKQZv5Wmn4tRF885wbJ7S1Nk1jP.m4lWMKuDN3z74sS0PERVr.W_t3w159IID2sUYpPxZBV.s.RjK1fxgyO7qeJW_IUNZ04u3kX01XmqoLUWamgVpNKlffMBSG2NiHDH58XACBQs4rLzqO9CDMWs5_pOets335eyZgLUkHNaROkllC7JFqnNITuaVsuZ2jc4zEciizoKluUUqS8pAfxF0cBXAam.ngrqlElL1oRP30EKttNFrxl5yNF0V21Zn2JkdK.Oqi7zCpjKkYPJtlA6wrRGH6DEupXZARmAzTFiDKr0UKcq1rnUEV6Coa9mTwUnLGk_1i1.8KAH28NsNzESmRGX7719B5Qxz2yiz7h5.pINUKiyYW6pR12iiC.pTrYakv8MtUSPqr.9ye5YMhRZ9BtKEFK76SXCsFKgiGCxe9Idjaj0vlqfWZVDdTCC7kiKHLjmCLMTKNFe0lqNKtLhs95yvdFCy.KS.hN6sIiF_B1du3hKhe0c6503kY2c.QtUYrwR4szaPgIr25f6kUJbg.qDXKJOZWY8GlaNCC1rUuhnrhC9tKjG89GvnMCKAMFkMSh4sLJkBWyFuZMIESeIG3N9x8ZxaR6hNyi1tW14TESzyOCfMtrdp9W78QMKDAv4869upRn7R6vErSA1eyafvPdNubouDEPEv4bPShMCWNt8Su7IJHN5NL9shqoABxwm02o.VGXq671Gt1I5pewPrMVlBTf82CRtMJIk2kgVC1AU3ThCGm1mOWOKxrdVyjIuJXfjJ5V1vSPSQlke2HM1_ZH1_LXj3LXDk3lkDlCS1HpmNG9roGXAJ5cWUB10RLEv2_zsT2ZMpDXvy3d9nybfQ0TmAs5MyVnfXGgrPb_R3xab7LkMhaG.fmWryou5j59zhyIXZ0dLQVLlWXuVO1QpBzYHZofICG31TTCnOdvYSt6Ajj8KkbYTEqp45KeJsh_YVSXwnbHmBhXuzEk8TOdm8bwGn2SXyDv0DggPNcvKiptsQYP.H4H3Aiyx1AZ8hJqx3nLOBDxmF4WAaeDGWjm0AQPpsoLrHM5Nfa9zPCALY4dCcLxAsjxbcdKpZx2HdWDg6sDh.fi22_1EzIHyrM68mqJgSk.1ldErpBoHUO2kn9OxmsVRygS8lQjkoB8L35PWtUo9McMR7uNbWVUevgWztb3XV1Td68V.Q45S4l_jHdKNkDzmx_2JeQ6WHEbnNt_Q7eMJOBQbuEFnffJ1g6EeRk3SxfwSBhqsQVKImAkaJtbKhV2b_sHsOgrqPGQMN1wTPpaILwPG5Zz3_ueiHatWkC69"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913488b09898fdfc';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=landing%20gear&__cf_chl_rt_tk=vkVztHdVeXTnvi26.J8R848QnW3AV.yZxL37NlfGlDg-1739782269-1.0.1.1-L4YGL2EnufEriPIAIsrNMsRxKm5.wt0.X412yY4txoI" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>