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.finflash{width:46px;height:46px} #mfam .rondel.wide{width:88px;height:33px} #mfam .finflash.tall{width:38px;height:46px} #mfam .mark .mk{font-size:10.5px;letter-spacing:1.7px;text-transform:uppercase;color:rgba(255,255,255,.55);line-height:1.5;font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .mark .mk b{display:block;color:#fff;letter-spacing:.2px;text-transform:none;font-size:14.5px;margin-top:2px} #mfam .statstrip .stat{border-top:3px solid var(--blue)} #mfam .statstrip .stat:first-child{border-top-color:var(--red)} #mfam table.oobt.fleet td:first-child{padding:10px 6px 10px 14px;vertical-align:top} #mfam .tthumb{display:block;width:150px;height:100px;background:#eef1f6 center\/cover no-repeat;border:1px solid var(--line)} #mfam table.oobt.fleet{table-layout:fixed;min-width:1072px} #mfam table.oobt.fleet col.c-th{width:172px} #mfam table.oobt.fleet col.c-type{width:198px} #mfam table.oobt.fleet col.c-role{width:150px} #mfam table.oobt.fleet col.c-num{width:78px} #mfam table.oobt.fleet col.c-yr{width:64px} #mfam table.oobt.fleet col.c-units{width:154px} #mfam table.oobt.fleet col.c-srv{width:104px} #mfam table.oobt.fleet col.c-rep{width:150px} #mfam table.oobt.fleet col.c-fd{width:118px} #mfam table.oobt.fleet th{white-space:normal} #mfam table.oobt.fleet.ord{min-width:900px} #mfam .ndet{display:inline} #mfam .ndet summary{display:inline;cursor:pointer;color:var(--link);font-family:'Gilroy semiBold',Helvetica,sans-serif;letter-spacing:.4px;list-style:none} #mfam .ndet summary::-webkit-details-marker{display:none} #mfam .ndet summary::after{content:' \\203A'} #mfam .ndet[open] summary{display:none} #mfam table.oobt.fleet td:last-child{color:var(--txt2)} #mfam table.oobt.former .tthumb{filter:saturate(.55)} #mfam table.oobt.former tr:hover .tthumb{filter:none} #mfam table.oobt.fleet td:last-child{overflow-wrap:anywhere} #mfam table.oobt.fleet td:last-child{font-size:12.5px;line-height:1.5;color:var(--txt3)} #mfam .de{color:var(--txt3);font-size:12.5px;font-family:'Gilroy regular',Helvetica,Arial,sans-serif;letter-spacing:0;text-transform:none} #mfam .orgcard .de{margin:-3px 0 8px} #mfam .oob dt .de,#mfam table.oobt .de{white-space:nowrap} #mfam .qbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:22px 0 0} #mfam .qin{flex:1 1 280px;max-width:460px;padding:11px 13px;font:400 15px\/1.4 'Gilroy regular',Helvetica,Arial,sans-serif;color:#0d1117;background:#fff;border:1px solid #d3d8e0;border-radius:0;outline:0;-webkit-appearance:none;appearance:none} #mfam .qin:focus{border-color:var(--blue)} #mfam .qin::-webkit-search-cancel-button{display:none} #mfam .qcnt{font-size:12.5px;letter-spacing:.4px;color:var(--txt3);font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .qbtn{padding:10px 13px;font-size:10.5px;letter-spacing:1.1px;text-transform:uppercase;font-family:'Gilroy semiBold',Helvetica,sans-serif;background:#fff;color:var(--txt2);border:1px solid #d3d8e0;border-radius:0;cursor:pointer;line-height:1.4} #mfam .qbtn:hover{border-color:var(--blue);color:var(--blue-ink)} #mfam .qhide{display:none!important} #mfam .qnone{display:none;padding:20px 2px;color:var(--txt2);font-size:15px} #mfam .qnone.on{display:block} #mfam .oob>div{cursor:pointer;user-select:none;align-items:center} #mfam .oob>div:focus-visible{outline:2px solid var(--blue);outline-offset:-2px} #mfam .oob>div>i{position:relative;flex:none;width:13px;height:13px;margin-left:auto;opacity:.75} #mfam .oob>div>i::before,#mfam .oob>div>i::after{content:'';position:absolute;background:#fff;left:0;top:6px;width:13px;height:1.5px} #mfam .oob>div>i::after{transform:rotate(90deg)} #mfam .oob.open>div>i::after{transform:rotate(0)} #mfam .oobwrap.coll .oob>dl{display:none} #mfam .oobwrap.coll .oob.open>dl{display:grid} #mfam table.oobt.cbt td{vertical-align:top} #mfam table.oobt.cbt tr.crow td{border-bottom:0} #mfam table.oobt.cbt tr.cdet>td{border-bottom:1px solid var(--line);padding:0 16px 20px;color:var(--txt2)} #mfam tr.cdet{display:none} #mfam tr.cdet.on{display:table-row} #mfam .cwho{display:block;font-size:12.5px;color:var(--txt3);line-height:1.45;margin-top:3px} #mfam .cserv{display:block;font-size:12.5px;color:var(--txt3);line-height:1.45;margin-top:3px} #mfam .cbx{padding:6px 11px;font-size:10.5px;letter-spacing:1.1px;text-transform:uppercase;font-family:'Gilroy semiBold',Helvetica,sans-serif;background:#fff;color:var(--blue-ink);border:1px solid var(--blue);border-radius:0;cursor:pointer;line-height:1.4;white-space:nowrap} #mfam .cbx:hover{background:var(--blue);color:#fff} #mfam .cdin{display:grid;grid-template-columns:1.6fr 1fr;gap:26px;padding-top:2px;max-width:none} #mfam .cdin p{font-size:16.5px;color:var(--txt2);margin:0 0 11px;max-width:66ch} #mfam .cdin p.crole{color:#0d1117} #mfam .cdl{margin:0} #mfam .cdl dt{font-size:10.5px;letter-spacing:1.6px;text-transform:uppercase;color:var(--txt3);font-family:'Gilroy semiBold',Helvetica,sans-serif;margin-top:12px} #mfam .cdl dt:first-child{margin-top:0} #mfam .cdl dd{margin:3px 0 0;font-size:14.5px;color:#0d1117;line-height:1.55} #mfam .cdl dd a{color:#0d1117;border-bottom:1px solid #c3cddb} #mfam .cdl dd a:hover{color:var(--blue-ink);border-bottom-color:var(--blue)} #mfam .ccav{display:block;font-size:13px;color:var(--txt3);line-height:1.55;margin-top:12px;padding-left:11px;border-left:2px solid var(--line);max-width:64ch} #mfam .clink{display:inline-block;margin:0 14px 0 0;font-size:13.5px} #mfam .cwar{font-size:11px;letter-spacing:1.3px;text-transform:uppercase;color:var(--txt3);font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .statstrip.dark{margin:22px 0 4px} #mfam ul.gl.cml{margin-top:18px!important} #mfam ul.gl.cml li{line-height:1.6} #mfam ul.gl.cml li b{color:#0d1117;font-weight:400;font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .cbig{display:inline-block;margin-top:22px;padding:13px 22px;background:var(--blue);color:#fff!important;border:1px solid var(--blue);border-radius:0;font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:11.5px;letter-spacing:1.6px;text-transform:uppercase;text-decoration:none} #mfam .cbig:hover{background:var(--blue-ink);border-color:var(--blue-ink)} #mfam .badge{height:66px;width:auto;display:block;flex:none;filter:drop-shadow(0 2px 9px rgba(0,0,0,.5))} #mfam .badge.big{height:112px} #mfam .mjc{height:96px;width:auto;display:block;flex:none;filter:drop-shadow(0 2px 9px rgba(0,0,0,.5))} #mfam .mcol{display:flex;flex-direction:column;gap:18px} #mfam .tthumb.none{background:repeating-linear-gradient(45deg,#f3f6fa,#f3f6fa 6px,#e9eef5 6px,#e9eef5 12px)} #mfam .cflag{display:inline-block;width:16px;height:16px;vertical-align:-3px;margin-right:7px;background-repeat:no-repeat;background-size:200px 20px} #mfam .nflag{display:inline-block;width:18px;height:12px;vertical-align:1px;margin-left:8px;background-repeat:no-repeat;background-size:242px 16px} #mfam .st{display:table;font-size:10px;letter-spacing:1.3px;text-transform:uppercase;padding:2px 7px;margin:8px 0 0;font-family:'Gilroy semiBold',Helvetica,sans-serif;border:1px solid currentColor;white-space:nowrap} #mfam .st.on{color:var(--green)} #mfam .st.out{color:var(--amber)} #mfam .st.ord{color:var(--blue-ink)} #mfam .flybtn{display:table;margin:8px 0 0;padding:4px 10px;font-size:10.5px;line-height:1.45;letter-spacing:1.2px;text-transform:uppercase;font-family:'Gilroy semiBold',Helvetica,sans-serif;color:#fff!important;background:var(--blue);border:1px solid var(--blue);white-space:nowrap;max-width:100%} #mfam .flybtn:hover{background:var(--blue-ink);border-color:var(--blue-ink)} #mfam .flybtn.ghost{background:transparent;border:1px solid var(--blue);color:var(--blue-ink)!important;letter-spacing:.9px;white-space:normal;max-width:11em} #mfam table.oobt.former td .flybtn.ghost{color:var(--blue-ink)!important} #mfam .flybtn .via{opacity:.72;letter-spacing:.8px} #mfam table.oobt td a.flybtn{border-bottom:0} #mfam table.oobt.former td a.flybtn{color:#fff!important} #mfam #structure,#mfam #former,#mfam #oob,#mfam #faq{background:var(--bg2)} #mfam .ngrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px} #mfam .ncard{display:block;background:#fff;border:1px solid var(--line);overflow:hidden;text-decoration:none} #mfam .ncard:hover{border-color:var(--blue)} #mfam .ncim{display:block;height:158px;background:#eef1f6 center\/cover no-repeat} #mfam .ncim.none{background:repeating-linear-gradient(45deg,#f3f6fa,#f3f6fa 8px,#e9eef5 8px,#e9eef5 16px)} #mfam .ncbody{display:block;padding:16px 18px 20px} #mfam .ncbody time{display:block;font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--txt3)} #mfam .nct{display:block;font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:17px;line-height:1.32;color:#0d1117;margin:9px 0 8px} #mfam .ncard:hover .nct{color:var(--link)} #mfam .ncx{display:block;font-size:14px;line-height:1.55;color:var(--txt2)} #mfam .ncgo{display:block;font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:12px;letter-spacing:1.4px;text-transform:uppercase;color:var(--link);margin-top:14px} #mfam .nmore{display:inline-block;margin-top:26px;font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:12px;letter-spacing:1.6px;text-transform:uppercase;color:var(--link)} @media(max-width:960px){#mfam .ngrid{grid-template-columns:1fr 1fr}} @media(max-width:620px){#mfam .ngrid{grid-template-columns:1fr}} #mfam #gallery{background:#0d1117} #mfam #gallery h2{color:#fff} #mfam #gallery .spx-lede{color:#9aa3b8} #mfam #gallery .kicker{color:var(--blue)} #mfam #gallery .acard{background:#161b24;border-color:#242c38} #mfam #gallery .acard .tx b{color:#fff} #mfam #gallery .acard .im{background-color:#242c38} #mfam #gallery .acard .im.none{background:repeating-linear-gradient(45deg,#1b212b,#1b212b 8px,#232a35 8px,#232a35 16px)} #mfam .org{margin-top:34px} #mfam .cmdcard{display:flex;align-items:center;gap:26px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--red);padding:22px 26px} #mfam .cface{display:block;flex:none;width:128px;height:128px;background:#eef1f6 center\/cover no-repeat;border:1px solid var(--line)} #mfam .cface.mono{display:flex;align-items:center;justify-content:center;background:var(--blue-dim);color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:44px;letter-spacing:1px;border-color:var(--blue)} #mfam .cmdtx{flex:1 1 auto;min-width:0;text-align:left} #mfam .crank{display:block;font-size:10.5px;letter-spacing:1.8px;text-transform:uppercase;color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .cmdtx b{display:block;font-size:21px;color:#0d1117;margin:3px 0 4px;font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .cmeta{display:block;font-size:13px;color:var(--txt3)} #mfam .cmdorg{flex:none;text-align:left;padding-left:22px;border-left:1px solid var(--line)} #mfam .cmdorg span{display:block;font-size:13.5px;color:#0d1117;font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .cmdorg em{display:block;font-style:normal;font-size:12.5px;color:#8b94a5;margin-top:3px} #mfam .oloc{font-size:12px;letter-spacing:1.3px;text-transform:uppercase;color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;margin:0 0 9px} #mfam .orgcard,#mfam .orgcard h4,#mfam .orgcard p,#mfam .orgcard .de{text-align:left} #mfam .orgrow{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px} #mfam .orgcard{background:#fff;border:1px solid var(--line);border-top:3px solid var(--blue);padding:20px 22px} #mfam .orgcard.wide{grid-column:1\/-1} #mfam .orgcard h4{margin:0 0 7px;font-size:16.5px;color:#0d1117} #mfam .orgcard p{font-size:14px;color:var(--txt2);max-width:none} #mfam .orgcard .tag{display:inline-block;font-size:10px;letter-spacing:1.4px;text-transform:uppercase;color:var(--blue-ink);border:1px solid var(--blue);padding:2px 8px;margin-bottom:11px;font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .orgcard.new{border-top-color:var(--red)} #mfam .orgcard.new .tag{color:var(--red);border-color:var(--red)} #mfam .tfgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:18px} #mfam .tfcol{border-top:1px solid var(--line);padding-top:14px} #mfam .tfcol h4{margin:0 0 3px;font-size:15px;color:#0d1117} #mfam .tfn{font-size:12px;letter-spacing:1.3px;text-transform:uppercase;color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;margin-bottom:8px} #mfam .tfcol p{font-size:13.5px;color:var(--txt2);margin:0} #mfam .tfmore{display:inline-block;margin-top:12px;font-size:12px;letter-spacing:1.3px;text-transform:uppercase;color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;border-bottom:1px solid var(--blue)} #mfam .tfmore:hover{color:#0d1117;border-bottom-color:#0d1117} #mfam .ucol{margin-top:12px} #mfam .ucol summary{list-style:none;cursor:pointer;font-size:12px;letter-spacing:1.3px;text-transform:uppercase;color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;padding:7px 0} #mfam .ucol summary::-webkit-details-marker{display:none} #mfam .ucol summary::after{content:' +';font-family:inherit} #mfam .ucol[open] summary::after{content:' \\2013'} #mfam .ucol summary:hover{color:#0d1117} #mfam a.unit{text-decoration:none} #mfam a.unit:hover{border-color:var(--blue);color:var(--blue-ink);background:var(--blue-dim)} #mfam table.oobt tr.flash td{background:var(--blue-dim);transition:background .45s} @media(max-width:900px){#mfam .tfgrid{grid-template-columns:1fr}} #mfam .units{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px} #mfam .unit{font-size:12.5px;padding:5px 11px;background:var(--bg2);border:1px solid var(--line);color:var(--txt2);font-family:'Gilroy semiBold',Helvetica,sans-serif} #mfam .acgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px} #mfam .acard{display:block;background:#fff;border:1px solid var(--line);overflow:hidden} #mfam .acard:hover{border-color:var(--blue)} #mfam .acard .im{display:block;height:132px;background:#eef1f6 center\/cover no-repeat} #mfam .acard .im.none{background:repeating-linear-gradient(45deg,#f3f6fa,#f3f6fa 8px,#e9eef5 8px,#e9eef5 16px)} #mfam .acard .tx{display:block;padding:14px 16px} #mfam .acard .tx b{display:block;font-size:15px;color:#0d1117;line-height:1.3} #mfam .acard .tx em{display:block;font-style:normal;font-size:12px;color:var(--txt3);margin-top:5px;font-variant-numeric:tabular-nums} #mfam .acard:hover .tx b{color:var(--blue-ink)} @media(max-width:1000px){#mfam .acgrid{grid-template-columns:repeat(3,1fr)}#mfam .orgrow{grid-template-columns:1fr 1fr}} @media(max-width:820px){#mfam .tthumb{width:118px;height:79px}#mfam .badge.big{height:84px}#mfam .mjc{height:74px}#mfam .mcol{gap:14px}#mfam .acgrid{grid-template-columns:1fr 1fr}#mfam .orgrow{grid-template-columns:1fr}#mfam .marks{gap:20px}#mfam .photocred{position:static;display:block;padding:0 24px 12px;text-align:left;max-width:none}} @media(max-width:820px){#mfam .cmdcard{flex-wrap:wrap;gap:14px}#mfam .cmdorg{padding-left:0;border-left:0;flex-basis:100%}#mfam .specgrid,#mfam .specgrid.three{grid-template-columns:1fr}#mfam .cols{grid-template-columns:1fr}#mfam .relgrid{grid-template-columns:1fr}#mfam .statstrip{grid-template-columns:1fr 1fr}#mfam .oob dl{grid-template-columns:1fr}#mfam .cdin{grid-template-columns:1fr;gap:18px}#mfam .oob dd{text-align:left}#mfam .frow{grid-template-columns:110px 1fr 56px;gap:10px}#mfam .srclist{columns:1}#mfam .oobmap{height:440px}#mfam .oobmap.home{height:400px}} #mfam .pqband{background:#0d1117;padding:56px 0} #mfam .pqband .wrap{max-width:1120px} #mfam 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.satlbx{position:absolute;top:18px;right:22px;color:rgba(255,255,255,.72);font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:10.5px;letter-spacing:1.6px;text-transform:uppercase} #mfam .satcap{display:flex;justify-content:space-between;align-items:baseline;gap:22px;flex-wrap:wrap;margin-top:12px;font-size:13px;line-height:1.5;color:var(--txt3)} #mfam .satcap b{font-family:'Gilroy semiBold',Gilroy,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;font-weight:400;color:var(--txt)} @media(max-width:820px){#mfam .satimg{height:380px}} @media(max-width:680px){#mfam .qa summary{padding:18px 14px;font-size:17px}#mfam .qa details .a{padding:0 14px 20px}#mfam section{padding:44px 0}} #mfam .mfshare{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:0 0 6px} #mfam .mfsh-btn{display:inline-flex;align-items:center;gap:8px;padding:9px 15px;background:transparent;border:1px solid var(--blue);color:var(--blue-ink);font-family:'Gilroy semiBold',Helvetica,sans-serif;font-size:11.5px;letter-spacing:1.6px;text-transform:uppercase;cursor:pointer;line-height:1} #mfam .mfsh-btn:hover{background:var(--blue);color:#fff} #mfam .mfsh-btn svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.8} #mfam .mfsh-net{display:none;align-items:center;gap:8px;flex-wrap:wrap} #mfam .mfshare.on .mfsh-net{display:flex} #mfam .mfsh-net a,#mfam .mfsh-net button{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--line);background:#fff;color:#3d4654;cursor:pointer;padding:0} #mfam .mfsh-net a:hover,#mfam .mfsh-net button:hover{border-color:var(--blue);color:var(--blue-ink)} #mfam .mfsh-net svg{width:16px;height:16px;fill:currentColor} #mfam .mfsh-said{font-size:12px;color:var(--green);font-family:'Gilroy semiBold',Helvetica,sans-serif;letter-spacing:.6px}#mfam .mlogo{display:inline-flex;align-items:center;justify-content:center;background:#fff;padding:10px 16px;height:68px;margin:0 0 18px;border:1px solid #e2e7ee}#mfam .mlogo .li{display:block;background:center\/contain no-repeat}#mfam .mlogo.sm{position:absolute;left:14px;top:96px;height:52px;padding:6px 10px;margin:0}#mfam .mlogo.sm img{max-height:38px;max-width:120px}#mfam .mlogo.xs{height:28px;padding:2px 6px;margin:0 10px 0 0;vertical-align:middle;border:0;background:transparent}#mfam .mlogo.xs img{max-height:24px;max-width:72px}#mfam .mrel{position:relative;padding-top:0}#mfam .mrel .mim{display:block;height:130px;margin:-26px -26px 44px;background:#eef1f6 center\/cover no-repeat}#mfam a.mname{display:inline-flex;align-items:center}#mfam span.acard{cursor:default}#mfam .pcred{font-size:12px;color:var(--txt3);margin:10px 0 28px;line-height:1.5}<\/style>\n<div id=\"mfam\">\n<div class=\"hero photo\">\n<div class=\"heroimg ph1\"><\/div>\n<div class=\"wrap hero-in\">\n<div class=\"crumb\"><a href=\"https:\/\/migflug.com\/air-forces\/\">Order of Battle<\/a> &middot; <a href=\"https:\/\/migflug.com\/aircraft-manufacturers\/\">Aircraft manufacturers<\/a> &middot; Russia<\/div>\n<h1>Alekseyev Central Hydrofoil Design Bureau<\/h1>\n<div class=\"native\">&#1062;&#1050;&#1041; &#1087;&#1086; &#1057;&#1055;&#1050; &#1080;&#1084;&#1077;&#1085;&#1080; &#1056;. &#1045;. &#1040;&#1083;&#1077;&#1082;&#1089;&#1077;&#1077;&#1074;&#1072; &middot; Central Hydrofoil Design Bureau<\/div>\n<p class=\"sub\">A hydrofoil bureau on the Volga built the Caspian Sea Monster, a 544-tonne ground-effect craft that was the world&rsquo;s heaviest aircraft for two decades and baffled American spy-satellite analysts.<\/p>\n<div class=\"statstrip\">\n<div class=\"stat\"><b>1951<\/b><span>Founded<\/span><\/div>\n<div class=\"stat\"><b>Active<\/b><span>Status<\/span><\/div>\n<div class=\"stat\"><b>4<\/b><span>Aircraft on record<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"photocred\">Photo: Vyacheslav Bukharov \/ Wikimedia Commons (CC BY-SA 4.0)<\/div>\n<div class=\"accent\"><\/div>\n<\/div>\n<div class=\"wrap\">\n<div class=\"chips\"><span class=\"chip\"><b>Country<\/b>Russia<\/span><span class=\"chip\"><b>Founded<\/b>1951-04-17<\/span><span class=\"chip\"><b>Founders<\/b>Rostislav Alexeyev<\/span><span class=\"chip\"><b>Headquarters<\/b>Nizhny Novgorod<\/span><span class=\"chip\"><b>Status<\/b>Active<\/span><\/div>\n<div class=\"mfshare\"><button type=\"button\" class=\"mfsh-btn\"><svg viewBox=\"0 0 24 24\"><circle cx=\"18\" cy=\"5\" r=\"3\"\/><circle cx=\"6\" cy=\"12\" r=\"3\"\/><circle cx=\"18\" cy=\"19\" r=\"3\"\/><path d=\"M8.6 10.6l6.8-4M8.6 13.4l6.8 4\"\/><\/svg>Share<\/button><span class=\"mfsh-net\"><\/span><span class=\"mfsh-said\"><\/span><\/div>\n<\/div>\n<section id=\"story\">\n<div class=\"wrap\">\n<div class=\"kicker\">The story<\/div>\n<h2>Alekseyev Central Hydrofoil Design Bureau: the company and the aircraft that made its name<\/h2>\n<div class=\"cols\">\n<div>\n<h3 class=\"sh\">Hydrofoils from a tank factory<\/h3>\n<p>Rostislav Alexeyev was a shipbuilding graduate sent to the Krasnoye Sormovo works in Gorky in 1941, where the war had him building tanks. A small hydrofoil laboratory grew up around him, and on 17 April 1951 it became the design bureau that now bears his name. Its Raketa of 1957 was the first commercially produced Soviet passenger hydrofoil; Meteors and Kometas followed, and the bureau says more than 4,000 hydrofoils have been built to its designs.<\/p>\n<h3 class=\"sh\">The Caspian Sea Monster<\/h3>\n<p>In the 1960s the bureau turned to the ekranoplan, a craft that flies a few metres above the water on the cushion of ground effect. Its <span class=\"imp\">KM<\/span>, 92 metres long and weighing 544 tonnes, was moved down the Volga by night under camouflage and first flew on 16 October 1966 with Alexeyev himself at the controls. It was the heaviest aircraft in the world until 1988, and US analysts puzzled over satellite images of it at Kaspiysk.<\/p>\n<h3 class=\"sh\">Missiles skimming the waves<\/h3>\n<p>The A-90 Orlyonok transport flew in 1972 and joined the Soviet Navy in 1979. The Lun of 1987, carrying six Moskit anti-ship missiles, is the only ground-effect craft ever deployed as a warship. Alexeyev was hurt testing a new ekranoplan in January 1980 and died weeks later. The bureau designs hydrofoils and ekranoplans still, and is under Western sanctions.<\/p>\n<\/div>\n<div>\n<div class=\"pull\">A hydrofoil bureau on the Volga built the Caspian Sea Monster, a 544-tonne ground-effect craft that was the world&rsquo;s heaviest aircraft for two decades and baffled American spy-satellite analysts.<cite>Alekseyev Central Hydrofoil Design Bureau &middot; verified 2026-10-03<\/cite><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"glance\">\n<div class=\"wrap\">\n<div class=\"kicker\">At a glance<\/div>\n<h2>Alekseyev Central Hydrofoil Design Bureau in numbers<\/h2>\n<div class=\"specgrid three\">\n<div class=\"spectable\">\n<h4>The company<\/h4>\n<dl>\n<dt>In short<\/dt>\n<dd>Founded 1951<\/p>\n<ul class=\"gl\">\n<li>Grew from Alexeyev&rsquo;s hydrofoil laboratory at Krasnoye Sormovo<\/li>\n<li>Based in Nizhny Novgorod (formerly Gorky)<\/li>\n<li>More than 40 ekranoplan projects, over 30 built<\/li>\n<\/ul>\n<\/dd>\n<\/dl>\n<\/div>\n<div class=\"spectable\">\n<h4>Production<\/h4>\n<dl>\n<dt>Best known for<\/dt>\n<dd>KM, Lun, Orlyonok<\/p>\n<ul class=\"gl\">\n<li>KM Caspian Sea Monster, 1966<\/li>\n<li>A-90 Orlyonok military transport<\/li>\n<li>Lun-class missile ekranoplan<\/li>\n<li>Raketa, Meteor and Kometa hydrofoils<\/li>\n<\/ul>\n<\/dd>\n<\/dl>\n<\/div>\n<div class=\"spectable\">\n<h4>Today<\/h4>\n<dl>\n<dt>Now<\/dt>\n<dd>Active<\/p>\n<ul class=\"gl\">\n<li>Developing new passenger hydrofoils<\/li>\n<li>Under EU and US sanctions<\/li>\n<\/ul>\n<\/dd>\n<\/dl>\n<\/div>\n<div class=\"spectable\">\n<h4>The numbers<\/h4>\n<dl>\n<dt>Hydrofoils built to its designs<\/dt>\n<dd>more than 4,000<\/dd>\n<dt>Ekranoplans built<\/dt>\n<dd>more than 30<\/dd>\n<dt>KM maximum take-off weight<\/dt>\n<dd>544 tonnes<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"fleet\">\n<div class=\"wrap\">\n<div class=\"kicker\">The aircraft<\/div>\n<h2>Every notable Alekseyev Central Hydrofoil Design Bureau aircraft<\/h2>\n<div class=\"tscroll\">\n<table class=\"oobt\" id=\"mfrtbl\">\n<thead>\n<tr>\n<th>Aircraft<\/th>\n<th>Role<\/th>\n<th>First flight<\/th>\n<th>Built<\/th>\n<th>Status<\/th>\n<th>Note<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>KM (Caspian Sea Monster)<\/td>\n<td>Experimental ekranoplan<\/td>\n<td>16 October 1966<\/td>\n<td>1<\/td>\n<td><span class=\"pill was\">Retired<\/span><\/td>\n<td>Heaviest aircraft in the world 1966&ndash;1988; crashed 1980<\/td>\n<\/tr>\n<tr>\n<td>A-90 Orlyonok<\/td>\n<td>Military transport ekranoplan<\/td>\n<td>1972<\/td>\n<td>4 (one static test)<\/td>\n<td><span class=\"pill was\">Retired<\/span><\/td>\n<td>One preserved in Moscow<\/td>\n<\/tr>\n<tr>\n<td>Lun-class (Project 903) MD-160<\/td>\n<td>Missile-armed ekranoplan<\/td>\n<td>1987<\/td>\n<td>1<\/td>\n<td><span class=\"pill was\">Retired<\/span><\/td>\n<td>Only ground-effect warship ever deployed; now a museum piece at Derbent<\/td>\n<\/tr>\n<tr>\n<td>Spasatel<\/td>\n<td>Rescue ekranoplan<\/td>\n<td><\/td>\n<td><\/td>\n<td><span class=\"pill was\">Retired<\/span><\/td>\n<td>Second Lun hull, never completed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"people\">\n<div class=\"wrap\">\n<div class=\"kicker\">Places, people, records<\/div>\n<h2>Where Alekseyev Central Hydrofoil Design Bureau built, who led it, what it achieved<\/h2>\n<div class=\"cols\">\n<div>\n<h3>Factories<\/h3>\n<ul class=\"gl\">\n<li><b>Krasnoye Sormovo<\/b> &middot; Nizhny Novgorod &mdash; Where the bureau began and the KM was built<\/li>\n<\/ul>\n<\/div>\n<div>\n<h3>People<\/h3>\n<ul class=\"gl\">\n<li><b>Rostislav Alexeyev<\/b> &middot; founder and chief designer &mdash; 1916&ndash;1980; Lenin Prize 1962<\/li>\n<li><b>V. Efimov<\/b> &middot; lead engineer on the KM<\/li>\n<\/ul>\n<\/div>\n<div>\n<h3>Records and firsts<\/h3>\n<ul class=\"gl\">\n<li>KM: largest and heaviest aircraft in the world, 1966&ndash;1988<\/li>\n<li>Lun: only ground-effect vehicle ever deployed as a warship<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"timeline\">\n<div class=\"wrap\">\n<div class=\"kicker\">Timeline<\/div>\n<h2>Alekseyev Central Hydrofoil Design Bureau, year by year<\/h2>\n<div class=\"tl\">\n<div class=\"tl-item\">\n<div class=\"yr\">1943<\/div>\n<p>First hydrofoil boat tested by Alexeyev&rsquo;s laboratory<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1951<\/div>\n<p>Design bureau founded<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1957<\/div>\n<p>Raketa hydrofoil enters production<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1966<\/div>\n<p>KM first flight on the Caspian<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1972<\/div>\n<p>A-90 Orlyonok first flight<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1979<\/div>\n<p>Orlyonok commissioned by the Soviet Navy<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1980<\/div>\n<p>Alexeyev dies after a test crash<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1980<\/div>\n<p>KM lost in a crash<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1987<\/div>\n<p>Lun MD-160 enters Caspian Flotilla service<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"faq\">\n<div class=\"wrap\">\n<div class=\"kicker\">Questions &amp; Answers<\/div>\n<h2>Everything people ask about Alekseyev Central Hydrofoil Design Bureau<\/h2>\n<div class=\"qa\">\n<details open>\n<summary>What is the Caspian Sea Monster?<\/summary>\n<div class=\"a\">The KM, a 544-tonne Soviet experimental ground-effect craft of 1966 designed by Rostislav Alexeyev&rsquo;s bureau.<\/div>\n<\/details>\n<details>\n<summary>Is an ekranoplan a plane or a ship?<\/summary>\n<div class=\"a\">It flies like an aircraft but only a few metres above the surface; the Soviet government classed them as ships.<\/div>\n<\/details>\n<details>\n<summary>Where is the Lun ekranoplan now?<\/summary>\n<div class=\"a\">Beached at Derbent in Dagestan, being restored as a museum exhibit.<\/div>\n<\/details>\n<details>\n<summary>Does the Alekseyev bureau still exist?<\/summary>\n<div class=\"a\">Yes, in Nizhny Novgorod, designing hydrofoils and ekranoplans.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the Caspian Sea Monster?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The KM, a 544-tonne Soviet experimental ground-effect craft of 1966 designed by Rostislav Alexeyev\\u2019s bureau.\"}}, {\"@type\": \"Question\", \"name\": \"Is an ekranoplan a plane or a ship?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It flies like an aircraft but only a few metres above the surface; the Soviet government classed them as ships.\"}}, {\"@type\": \"Question\", \"name\": \"Where is the Lun ekranoplan now?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Beached at Derbent in Dagestan, being restored as a museum exhibit.\"}}, {\"@type\": \"Question\", \"name\": \"Does the Alekseyev bureau still exist?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, in Nizhny Novgorod, designing hydrofoils and ekranoplans.\"}}]}<\/script><hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Continue the tour<\/div>\n<h2>Around Alekseyev Central Hydrofoil Design Bureau<\/h2>\n<div class=\"relgrid\"><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft-manufacturers\/mil\/\"><span class=\"rk\">Russia<\/span><span class=\"rh\">Mil<\/span><span class=\"rp\">A Siberian railwayman&rsquo;s son who started with autogyros built the design bureau behind the most-produced helicopter in history and the heaviest-lifting rotorcraft&hellip;<\/span><span class=\"go\">Read the Mil page<\/span><\/a><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft-manufacturers\/mikoyan\/\"><span class=\"rk\">Russia<\/span><span class=\"rh\">Mikoyan<\/span><span class=\"rp\">Two engineers handed a disgraced rival&rsquo;s fighter in 1939 built the bureau whose initials became the West&rsquo;s word for any Soviet jet &mdash; more than 11,000&hellip;<\/span><span class=\"go\">Read the Mikoyan page<\/span><\/a><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft-manufacturers\/\"><span class=\"rk\">The index<\/span><span class=\"rh\">All aircraft manufacturers<\/span><span class=\"rp\">Every company that built an aircraft flown by the air forces in the Order of Battle, current and historic.<\/span><span class=\"go\">Open the list<\/span><\/a><\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section style=\"padding:48px 0 64px\">\n<div class=\"wrap\">\n<div class=\"kicker\">Sources &amp; Further Reading<\/div>\n<h2>Every fact, checked<\/h2>\n<ul class=\"srclist\">\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Alekseyev_Central_Hydrofoil_Design_Bureau\" rel=\"nofollow noopener\" target=\"_blank\">Alekseyev Central Hydrofoil Design Bureau &mdash; Wikipedia<\/a><span><\/span><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Rostislav_Alexeyev\" rel=\"nofollow noopener\" target=\"_blank\">Rostislav Alexeyev &mdash; Wikipedia<\/a><span><\/span><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Caspian_Sea_Monster\" rel=\"nofollow noopener\" target=\"_blank\">Caspian Sea Monster &mdash; Wikipedia<\/a><span><\/span><\/li>\n<li><a href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A6%D0%9A%D0%91_%D0%BF%D0%BE_%D0%A1%D0%9F%D0%9A_%D0%B8%D0%BC%D0%B5%D0%BD%D0%B8_%D0%A0._%D0%95._%D0%90%D0%BB%D0%B5%D0%BA%D1%81%D0%B5%D0%B5%D0%B2%D0%B0\" rel=\"nofollow noopener\" target=\"_blank\">Central Hydrofoil Design Bureau &mdash; Wikipedia (Russian)<\/a><span><\/span><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/A-90_Orlyonok\" rel=\"nofollow noopener\" target=\"_blank\">A-90 Orlyonok &mdash; Wikipedia<\/a><span><\/span><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Lun-class_ekranoplan\" rel=\"nofollow noopener\" target=\"_blank\">Lun-class ekranoplan &mdash; Wikipedia<\/a><span><\/span><\/li>\n<\/ul>\n<p class=\"verified\">Verified 2026-10-03.<\/p>\n<\/div>\n<\/section>\n<\/div>\n<style>#mfam .ph1{background-image:url(https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:auto\/h:auto\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/10\/w25-hero-mfr-alekseyev.jpg)!important}<\/style>\n<style>#mfam 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":31477,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"editor_notices":[],"footnotes":""},"class_list":["post-31604","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Alekseyev Central Hydrofoil Design Bureau | MiGFlug<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/migflug.com\/tr\/ucak-ureticileri\/alekseyev\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Alekseyev Central Hydrofoil Design Bureau | MiGFlug\" \/>\n<meta property=\"og:description\" content=\"Order of Battle &middot; Aircraft manufacturers &middot; Russia Alekseyev Central Hydrofoil Design Bureau &#1062;&#1050;&#1041; &#1087;&#1086; &#1057;&#1055;&#1050; &#1080;&#1084;&#1077;&#1085;&#1080; &#1056;. &#1045;. &#1040;&#1083;&#1077;&#1082;&#1089;&#1077;&#1077;&#1074;&#1072; &middot; Central Hydrofoil Design Bureau A hydrofoil bureau on the Volga built the Caspian Sea Monster, a 544-tonne ground-effect craft that was the world&rsquo;s heaviest aircraft for two decades and baffled American spy-satellite analysts. 1951Founded [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/migflug.com\/tr\/ucak-ureticileri\/alekseyev\/\" \/>\n<meta property=\"og:site_name\" content=\"MiGFlug\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/MiGFlug\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-08T16:16:38+00:00\" \/>\n<meta property=\"og:image\" 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