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class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Gouge_flap_%D0%97%D0%B0%D0%BA%D1%80%D1%8B%D0%BB%D0%BE%D0%BA_%D0%93%D0%BE%D1%83%D0%B4%D0%B6%D0%B0.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/c/c5/Gouge_flap_%D0%97%D0%B0%D0%BA%D1%80%D1%8B%D0%BB%D0%BE%D0%BA_%D0%93%D0%BE%D1%83%D0%B4%D0%B6%D0%B0.jpg" decoding="async" width="164" height="162" class="mw-file-element" data-file-width="164" data-file-height="162" /></a><figcaption></figcaption></figure> <p>The <b>Gouge flap</b>, is a type of <a href="/wiki/Flap_(aircraft)" class="mw-redirect" title="Flap (aircraft)">aircraft flap</a>, which moves on a track when raised or lowered; in level flight. Invented by <a href="/wiki/Arthur_Gouge" title="Arthur Gouge">Arthur Gouge</a> of <a href="/wiki/Short_Brothers" title="Short Brothers">Short Brothers</a> in 1936, it allows pilots to increase both the wing area and the chord of an aircraft's wing, thereby reducing the <a href="/wiki/Stall_(fluid_mechanics)" class="mw-redirect" title="Stall (fluid mechanics)">stalling speed</a> at a given weight. This provides benefits including a shorter take-off distance for any given load, a shorter distance to achieve a specific height and a lower take-off speed. However, the Gouge flap system, in spite of its use on production aircraft like the <a href="/wiki/Short_Sunderland" title="Short Sunderland">Short Sunderland</a> and the <a href="/wiki/Short_Stirling" title="Short Stirling">Short Stirling</a>, has only been used on aircraft produced by Short Brothers. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Development">Development</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=1" title="Edit section: Development"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Gouge flap was patented in 1936, British Patent no. 443,516 being awarded jointly to Short Bros. Ltd. and Arthur Gouge for "Improvements in or connected with Wings for Aircraft, (controller flaps)".<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <blockquote><p>The Gouge flap "consists of a sharp nosed aerofoil, which in the closed position, forms part of the wing profile . The flap tapers with the wing, i.e. the width of the flap at any point is a constant proportion of the wing chord at that point; when open the extended portion also varies with the chord. All sections through the flapped portion of the wing are similar in shape and proportion. The flap moves on tracks, rotating conically about an imaginary axis below the wing, nearly parallel to the trailing edge. When open, the flap increases the wing chord and the wing area."<sup id="cite_ref-rm1753p3_2-0" class="reference"><a href="#cite_note-rm1753p3-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></p></blockquote> <p>The British <a href="/wiki/Advisory_Committee_for_Aeronautics" title="Advisory Committee for Aeronautics">Aeronautical Research Committee</a>'s research paper R&M No. 1753 concluded, among other things, that Gouge flaps half and fully open, decreased take-off distance by 14% and 23% respectively and decreased the distance from starting to clearing a "50 ft obstacle" by 21% and 23% respectively. Speed at take-off was "reduced by 3 and 8 m.p.h, respectively."<sup id="cite_ref-rm1753p8_3-0" class="reference"><a href="#cite_note-rm1753p8-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Short Brothers first installed the Gouge flap on a <a href="/wiki/Short_Scion" title="Short Scion">Scion</a> fitted with the (scaled-down) wings being prepared for the <a href="/wiki/Short_Empire" title="Short Empire">Short Empire</a> flying-boat.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The flaps on this aircraft, which was designated 'M.3', were submitted to extensive testing by the <a href="/wiki/Royal_Aircraft_Establishment" title="Royal Aircraft Establishment">Royal Aircraft Establishment</a> Farnborough, their report appearing as R&M No. 1753 (see <a href="#Bibliography">Bibliography</a> below). Shorts used the Gouge flaps on several successful aircraft types, e.g. the Empire boats,<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> the <a href="/wiki/Short_S.26" title="Short S.26">Short S.26</a> G-class 'Golden Boats', the <a href="/wiki/Short_Sunderland" title="Short Sunderland">Short Sunderland</a><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and the <a href="/wiki/Short_Stirling" title="Short Stirling">Stirling</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>When <i>Flight</i> Magazine described the <a href="/wiki/Fowler_flap" class="mw-redirect" title="Fowler flap">Fowler flap</a> in 1942,<sup id="cite_ref-Flight_p.353_8-0" class="reference"><a href="#cite_note-Flight_p.353-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> the article's subtitle read "An American High-lift Device With Properties Similar to Those of the Better-known British Types", and the Gouge, <a href="/wiki/Handley_Page" title="Handley Page">Handley Page</a>, and <a href="/wiki/Fairey_Aviation_Company" title="Fairey Aviation Company">Fairey</a>/Youngman flaps were all given equal mention. The Gouge flap, although widely used on Shorts aircraft, was not adopted by other manufacturers, several of which developed their own variants. The <a href="/wiki/Advisory_Committee_for_Aeronautics" title="Advisory Committee for Aeronautics">Aeronautical Research Council</a>'s R&M no. 2622 entitled "The Aerodynamic Characteristics of Flaps" dated 1947 compared many variants but merely mentions the Gouge flap in a footnote on p. 10, where it is described as being "rather like the Blackburn flap ... but with no slot between the flap and wing."<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>The advantage of the additional lift generated by a slot acted in the Fowler flap's success relative to the Gouge flap, as did its natural tendency to retract itself in flight.<sup id="cite_ref-Flight_p.353_8-1" class="reference"><a href="#cite_note-Flight_p.353-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Shorts themselves did not use the Gouge flap on their next project, the <a href="/wiki/Short_Shetland" title="Short Shetland">Shetland</a>, preferring the use of slotted flaps on this large seaplane.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Aerodynamics" title="Aerodynamics">Aerodynamics</a></li> <li><a href="/wiki/Airfoil" title="Airfoil">Airfoil</a></li> <li><a href="/wiki/Lift_(force)" title="Lift (force)">Lift (force)</a></li> <li><a href="/wiki/Flap_(aircraft)" class="mw-redirect" title="Flap (aircraft)">Flap (aircraft)</a></li> <li><a href="/wiki/High-lift_device" title="High-lift device">High-lift device</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Notes">Notes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=5" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width reflist-columns-2"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">Cassidy, Flying Empires, 2009, p.9.</span> </li> <li id="cite_note-rm1753p3-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-rm1753p3_2-0">^</a></b></span> <span class="reference-text">ARC R&M 1753, 1936, p.3.</span> </li> <li id="cite_note-rm1753p8-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-rm1753p8_3-0">^</a></b></span> <span class="reference-text">ARC R&M 1753, 1936, p.8.</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">Barnes & James, 1989, p.290</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">Barnes & James, 1989, p.314.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">Eden 2004, p. 442.</span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text">Barnes & James, 1989, p.371.</span> </li> <li id="cite_note-Flight_p.353-8"><span class="mw-cite-backlink">^ <a href="#cite_ref-Flight_p.353_8-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Flight_p.353_8-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><i>Flight</i> Magazine, Vol. XLI, Issue 1737, p.353</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">ARC R&M 2622, 1947, p.10.</span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">Barnes & James 1989, p.392.</span> </li> </ol></div> <div class="mw-heading mw-heading3"><h3 id="Bibliography">Bibliography</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gouge_flap&action=edit&section=6" title="Edit section: Bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239549316">.mw-parser-output .refbegin{margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li{page-break-inside:avoid;break-inside:avoid-column}@media screen{.mw-parser-output .refbegin{font-size:90%}}</style><div class="refbegin" style=""> <ul><li><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFBarnes_C.H.James_D.N.1989" class="citation book cs1">Barnes C.H.; James D.N. (1989). <i>Shorts Aircraft since 1900</i>. London: Putnam. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-85177-819-4" title="Special:BookSources/0-85177-819-4"><bdi>0-85177-819-4</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Shorts+Aircraft+since+1900&rft.place=London&rft.pub=Putnam&rft.date=1989&rft.isbn=0-85177-819-4&rft.au=Barnes+C.H.&rft.au=James+D.N.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCassidy1996" class="citation book cs1">Cassidy, Brian (1996). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120224195116/http://www.users.waitrose.com/~mbcass/Flying%20Empires.pdf"><i>Flying Empires: Short 'C' class Empire flying boats</i></a> <span class="cs1-format">(PDF)</span>. Bath, England: Queens Parade P. p. 29. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0952929802" title="Special:BookSources/978-0952929802"><bdi>978-0952929802</bdi></a>. Archived from <a rel="nofollow" class="external text" href="http://www.users.waitrose.com/~mbcass/Flying%20Empires.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2012-02-24<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-12-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Flying+Empires%3A+Short+%27C%27+class+Empire+flying+boats&rft.place=Bath%2C+England&rft.pages=29&rft.pub=Queens+Parade+P&rft.date=1996&rft.isbn=978-0952929802&rft.aulast=Cassidy&rft.aufirst=Brian&rft_id=http%3A%2F%2Fwww.users.waitrose.com%2F~mbcass%2FFlying%2520Empires.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCohen,_B.A.,_B.Sc.1936" class="citation journal cs1">Cohen, B.A., B.Sc., J. (1936). <a rel="nofollow" class="external text" href="http://naca.central.cranfield.ac.uk/reports/arc/rm/1753.pdf">"Full Scale Trials on Scion M. 3 with a Gouge Flap"</a> <span class="cs1-format">(PDF)</span>. <i>Reports & Memoranda</i> (1753). Aeronautical Research Committee, Air Ministry.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Reports+%26+Memoranda&rft.atitle=Full+Scale+Trials+on+Scion+M.+3+with+a+Gouge+Flap&rft.issue=1753&rft.date=1936&rft.aulast=Cohen%2C+B.A.%2C+B.Sc.&rft.aufirst=J.&rft_id=http%3A%2F%2Fnaca.central.cranfield.ac.uk%2Freports%2Farc%2Frm%2F1753.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span><span class="cs1-maint citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_journal" title="Template:Cite journal">cite journal</a>}}</code>: CS1 maint: multiple names: authors list (<a href="/wiki/Category:CS1_maint:_multiple_names:_authors_list" title="Category:CS1 maint: multiple names: authors list">link</a>)</span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEden,_Paul2004" class="citation book cs1">Eden, Paul, ed. (2004). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120203212608/http://www.users.waitrose.com/~mbcass/Flying%20Empires.pdf"><i>The Encyclopedia of Aircraft of WW II</i></a> <span class="cs1-format">(PDF)</span>. Leicester, UK: Silverdale Books/Bookmart Ltd. p. 29. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-84509-013-6" title="Special:BookSources/1-84509-013-6"><bdi>1-84509-013-6</bdi></a>. Archived from <a rel="nofollow" class="external text" href="http://www.users.waitrose.com/~mbcass/Flying%20Empires.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2012-02-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-10-05</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Encyclopedia+of+Aircraft+of+WW+II&rft.place=Leicester%2C+UK&rft.pages=29&rft.pub=Silverdale+Books%2FBookmart+Ltd&rft.date=2004&rft.isbn=1-84509-013-6&rft_id=http%3A%2F%2Fwww.users.waitrose.com%2F~mbcass%2FFlying%2520Empires.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPoulsen,_C.M.1942" class="citation journal cs1">Poulsen, C.M., ed. (1942-04-09). <a rel="nofollow" class="external text" href="http://www.flightglobal.com/pdfarchive/view/1942/1942%20-%200783.html">"Load, Lift and Landing"</a>. <i>Flight Magazine</i>. <b>XLI</b> (1737): 353.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Flight+Magazine&rft.atitle=Load%2C+Lift+and+Landing&rft.volume=XLI&rft.issue=1737&rft.pages=353&rft.date=1942-04-09&rft_id=http%3A%2F%2Fwww.flightglobal.com%2Fpdfarchive%2Fview%2F1942%2F1942%2520-%25200783.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFYoung,_B.A.1947" class="citation journal cs1">Young, B.A., A.D. (1947). <a rel="nofollow" class="external text" href="http://naca.central.cranfield.ac.uk/reports/arc/rm/2622.pdf">"The Aerodynamic Characteristics of Flaps"</a> <span class="cs1-format">(PDF)</span>. <i>Reports & Memoranda</i> (2622). Aeronautical Research Council, Ministry of Supply.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Reports+%26+Memoranda&rft.atitle=The+Aerodynamic+Characteristics+of+Flaps&rft.issue=2622&rft.date=1947&rft.aulast=Young%2C+B.A.&rft.aufirst=A.D.&rft_id=http%3A%2F%2Fnaca.central.cranfield.ac.uk%2Freports%2Farc%2Frm%2F2622.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AGouge+flap" class="Z3988"></span></li></ul> </div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output 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<li><a href="/wiki/V-tail" title="V-tail">V-tail</a></li> <li><a href="/wiki/Vertical_stabilizer" title="Vertical stabilizer">Vertical stabilizer</a></li> <li><a href="/wiki/Wing_root" title="Wing root">Wing root</a></li> <li><a href="/wiki/Wing_tip" title="Wing tip">Wing tip</a></li> <li><a href="/wiki/Wingbox" title="Wingbox">Wingbox</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Aircraft_flight_control_system" title="Aircraft flight control system">Flight controls</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aileron" title="Aileron">Aileron</a></li> <li><a href="/wiki/Air_brake_(aeronautics)" title="Air brake (aeronautics)">Airbrake</a></li> <li><a href="/wiki/Aircraft_flight_control_system#Artificial_feel_devices" title="Aircraft flight control system">Artificial feel</a></li> <li><a href="/wiki/Autopilot" title="Autopilot">Autopilot</a></li> <li><a href="/wiki/Canard_(aeronautics)" title="Canard (aeronautics)">Canard</a></li> <li><a href="/wiki/Centre_stick" title="Centre stick">Centre stick</a></li> <li><a href="/wiki/Deceleron" title="Deceleron">Deceleron</a></li> <li><a href="/wiki/Dive_brake" title="Dive brake">Dive brake</a></li> <li><a href="/wiki/Dual_control_(aviation)" title="Dual control (aviation)">Dual control</a></li> <li><a href="/wiki/Electro-hydraulic_actuator" title="Electro-hydraulic actuator">Electro-hydraulic actuator</a></li> <li><a href="/wiki/Elevator_(aeronautics)" title="Elevator (aeronautics)">Elevator</a></li> <li><a href="/wiki/Elevon" title="Elevon">Elevon</a></li> <li><a href="/wiki/Flaperon" title="Flaperon">Flaperon</a></li> <li><a href="/wiki/Flight_control_modes" title="Flight control modes">Flight control modes</a></li> <li><a href="/wiki/Fly-by-wire" title="Fly-by-wire">Fly-by-wire</a></li> <li><a href="/wiki/Gust_lock" title="Gust lock">Gust lock</a></li> <li><a href="/wiki/HOTAS" title="HOTAS">HOTAS</a></li> <li><a href="/wiki/Rudder#Aircraft_rudders" title="Rudder">Rudder</a></li> <li><a href="/wiki/Rudder_pedal" title="Rudder pedal">Rudder pedals</a></li> <li><a href="/wiki/Servo_tab" title="Servo tab">Servo tab</a></li> <li><a href="/wiki/Side-stick" title="Side-stick">Side-stick</a></li> <li><a href="/wiki/Spoiler_(aeronautics)" title="Spoiler (aeronautics)">Spoiler</a></li> <li><a href="/wiki/Spoileron" title="Spoileron">Spoileron</a></li> <li><a href="/wiki/Stabilator" title="Stabilator">Stabilator</a></li> <li><a href="/wiki/Stick_pusher" title="Stick pusher">Stick pusher</a></li> <li><a href="/wiki/Stick_shaker" title="Stick shaker">Stick shaker</a></li> <li><a href="/wiki/Trim_tab" title="Trim tab">Trim tab</a></li> <li><a href="/wiki/Wing_warping" title="Wing warping">Wing warping</a></li> <li><a href="/wiki/Yaw_damper" title="Yaw damper">Yaw damper</a></li> <li><a href="/wiki/Yoke_(aeronautics)" title="Yoke (aeronautics)">Yoke</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Aerodynamics" title="Aerodynamics">Aerodynamic</a> and <a href="/wiki/High-lift_device" title="High-lift device">high-lift</a><br />devices</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Boeing_X-53_Active_Aeroelastic_Wing" title="Boeing X-53 Active Aeroelastic Wing">Active Aeroelastic Wing</a></li> <li><a href="/wiki/Adaptive_compliant_wing" title="Adaptive compliant wing">Adaptive compliant wing</a></li> <li><a href="/wiki/Anti-shock_body" title="Anti-shock body">Anti-shock body</a></li> <li><a href="/wiki/Blown_flap" title="Blown flap">Blown flap</a></li> <li><a href="/wiki/Channel_wing" title="Channel wing">Channel wing</a></li> <li><a href="/wiki/Leading-edge_extension#Dogtooth_extension" title="Leading-edge extension">Dog-tooth</a></li> <li><a href="/wiki/Drag-reducing_aerospike" title="Drag-reducing aerospike">Drag-reducing aerospike</a></li> <li><a href="/wiki/Flap_(aeronautics)" title="Flap (aeronautics)">Flap</a></li> <li><a class="mw-selflink selflink">Gouge flap</a></li> <li><a href="/wiki/Gurney_flap" title="Gurney flap">Gurney flap</a></li> <li><a href="/wiki/Krueger_flap" title="Krueger flap">Krueger flap</a></li> <li><a href="/wiki/Leading-edge_cuff" title="Leading-edge cuff">Leading-edge cuff</a></li> <li><a href="/wiki/Leading-edge_droop_flap" title="Leading-edge droop flap">Leading-edge droop flap</a></li> <li><a href="/wiki/Leading-edge_extension" title="Leading-edge extension">LEX</a></li> <li><a href="/wiki/Leading-edge_slat" title="Leading-edge slat">Slats</a></li> <li><a href="/wiki/Leading-edge_slot" title="Leading-edge slot">Slot</a></li> <li><a href="/wiki/Stall_strips" title="Stall strips">Stall strips</a></li> <li><a href="/wiki/Strake_(aeronautics)" title="Strake (aeronautics)">Strake</a></li> <li><a href="/wiki/Variable-sweep_wing" title="Variable-sweep wing">Variable-sweep wing</a></li> <li><a href="/wiki/Vortex_generator" title="Vortex generator">Vortex generator</a></li> <li><a href="/wiki/Vortilon" title="Vortilon">Vortilon</a></li> <li><a href="/wiki/Wing_fence" title="Wing fence">Wing fence</a></li> <li><a href="/wiki/Wingtip_device" title="Wingtip device">Winglet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Avionics" title="Avionics">Avionic</a> and <a href="/wiki/Flight_instruments" title="Flight instruments">flight<br />instrument</a> systems</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Airborne_collision_avoidance_system" title="Airborne collision avoidance system">ACAS</a></li> <li><a href="/wiki/Air_data_boom" title="Air data boom">Air data boom</a></li> <li><a href="/wiki/Air_data_computer" title="Air data computer">Air data computer</a></li> <li><a href="/wiki/Aircraft_periscope" class="mw-redirect" title="Aircraft periscope">Aircraft periscope</a></li> <li><a href="/wiki/Airspeed_indicator" title="Airspeed indicator">Airspeed indicator</a></li> <li><a href="/wiki/Altimeter" title="Altimeter">Altimeter</a></li> <li><a href="/wiki/Annunciator_panel" title="Annunciator panel">Annunciator panel</a></li> <li><a href="/wiki/Astrodome_(aeronautics)" title="Astrodome (aeronautics)">Astrodome</a></li> <li><a href="/wiki/Attitude_indicator" title="Attitude indicator">Attitude indicator</a></li> <li><a href="/wiki/Compass" title="Compass">Compass</a></li> <li><a href="/wiki/Course_deviation_indicator" title="Course deviation indicator">Course deviation indicator</a></li> <li><a href="/wiki/Electronic_flight_instrument_system" title="Electronic flight instrument system">EFIS</a></li> <li><a href="/wiki/Engine-indicating_and_crew-alerting_system" title="Engine-indicating and crew-alerting system">EICAS</a></li> <li><a href="/wiki/Flight_management_system" title="Flight management system">Flight management system</a></li> <li><a href="/wiki/Glass_cockpit" title="Glass cockpit">Glass cockpit</a></li> <li><a href="/wiki/Global_Positioning_System" title="Global Positioning System">GPS</a></li> <li><a href="/wiki/Head-up_display" title="Head-up display">Head-up display</a></li> <li><a href="/wiki/Heading_indicator" title="Heading indicator">Heading indicator</a></li> <li><a href="/wiki/Horizontal_situation_indicator" title="Horizontal situation indicator">Horizontal situation indicator</a></li> <li><a href="/wiki/Inertial_navigation_system" title="Inertial navigation system">INS</a></li> <li><a href="/wiki/Integrated_standby_instrument_system" title="Integrated standby instrument system">ISIS</a></li> <li><a href="/wiki/Multi-function_display" title="Multi-function display">Multi-function display</a></li> <li><a href="/wiki/Pitot%E2%80%93static_system" title="Pitot–static system">Pitot–static system</a></li> <li><a href="/wiki/Radar_altimeter" title="Radar altimeter">Radar altimeter</a></li> <li><a href="/wiki/Traffic_collision_avoidance_system" title="Traffic collision avoidance system">TCAS</a></li> <li><a href="/wiki/Transponder_(aeronautics)" title="Transponder (aeronautics)">Transponder</a></li> <li><a href="/wiki/Turn_and_slip_indicator" title="Turn and slip indicator">Turn and slip indicator</a></li> <li><a href="/wiki/Variometer" title="Variometer">Variometer</a></li> <li><a href="/wiki/Yaw_string" title="Yaw string">Yaw string</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Aircraft_engine" title="Aircraft engine">Propulsion</a> controls,<br /> devices and <a href="/wiki/Aircraft_fuel_system" title="Aircraft fuel system">fuel systems</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Autothrottle" title="Autothrottle">Autothrottle</a></li> <li><a href="/wiki/Drop_tank" title="Drop tank">Drop tank</a></li> <li><a href="/wiki/FADEC" title="FADEC">FADEC</a></li> <li><a href="/wiki/Fuel_tank#Aircraft" title="Fuel tank">Fuel tank</a></li> <li><a href="/wiki/Gascolator" title="Gascolator">Gascolator</a></li> <li><a href="/wiki/Inlet_cone" title="Inlet cone">Inlet cone</a></li> <li><a href="/wiki/Intake_ramp" title="Intake ramp">Intake ramp</a></li> <li><a href="/wiki/NACA_cowling" title="NACA cowling">NACA cowling</a></li> <li><a href="/wiki/NACA_duct" title="NACA duct">NACA duct</a></li> <li><a href="/wiki/Self-sealing_fuel_tank" title="Self-sealing fuel tank">Self-sealing fuel tank</a></li> <li><a href="/wiki/Splitter_plate_(aeronautics)" title="Splitter plate (aeronautics)">Splitter plate</a></li> <li><a href="/wiki/Throttle" title="Throttle">Throttle</a></li> <li><a href="/wiki/Thrust_lever" title="Thrust lever">Thrust lever</a></li> <li><a href="/wiki/Thrust_reversal" title="Thrust reversal">Thrust reversal</a></li> <li><a href="/wiki/Townend_ring" title="Townend ring">Townend ring</a></li> <li><a href="/wiki/War_emergency_power" title="War emergency power">War emergency power</a></li> <li><a href="/wiki/Wet_wing" title="Wet wing">Wet wing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Landing_gear" title="Landing gear">Landing</a> and <a href="/wiki/Arresting_gear" title="Arresting gear">arresting gear</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aircraft_tire" title="Aircraft tire">Aircraft tire</a></li> <li><a href="/wiki/Tailhook" title="Tailhook">Arrestor hook</a></li> <li><a href="/wiki/Autobrake" title="Autobrake">Autobrake</a></li> <li><a href="/wiki/Conventional_landing_gear" title="Conventional landing gear">Conventional landing gear</a></li> <li><a href="/wiki/Drogue_parachute" title="Drogue parachute">Drogue parachute</a></li> <li><a href="/wiki/Landing_gear" title="Landing gear">Landing gear</a></li> <li><a href="/wiki/Landing_gear_extender" title="Landing gear extender">Landing gear extender</a></li> <li><a href="/wiki/Oleo_strut" title="Oleo strut">Oleo strut</a></li> <li><a href="/wiki/Tricycle_landing_gear" title="Tricycle landing gear">Tricycle landing gear</a></li> <li><a href="/wiki/Tundra_tire" title="Tundra tire">Tundra tire</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Escape systems</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ejection_seat" title="Ejection seat">Ejection seat</a></li> <li><a href="/wiki/Escape_crew_capsule" title="Escape crew capsule">Escape crew capsule</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other systems</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aircraft_lavatory" title="Aircraft lavatory">Aircraft lavatory</a></li> <li><a href="/wiki/Auxiliary_power_unit" title="Auxiliary power unit">Auxiliary power unit</a></li> <li><a href="/wiki/Bleed_air" title="Bleed air">Bleed air system</a></li> <li><a href="/wiki/Deicing_boot" title="Deicing boot">Deicing boot</a></li> <li><a href="/wiki/Emergency_oxygen_system" title="Emergency oxygen system">Emergency oxygen system</a></li> <li><a href="/wiki/Environmental_control_system" title="Environmental control system">Environmental control system</a></li> <li><a href="/wiki/Flight_recorder" title="Flight recorder">Flight recorder</a></li> <li><a href="/wiki/Hydraulic_fluid#Aircraft_hydraulic_systems" title="Hydraulic fluid">Hydraulic system</a></li> <li><a href="/wiki/Ice_protection_system" title="Ice protection system">Ice protection 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