Short Knuckleduster
...that the Short Knuckleduster gull-winged flying boat never entered military service, but data from its handling and engine steam-cooling aided the design of Short's Empire and Sunderland aircraft?
...that the <b id="mwBCM"><a href="./Short_Knuckleduster" id="mwBCQ" rel="mw:WikiLink" title="Short Knuckleduster">Short Knuckleduster</a></b> <a href="./Gull_wing" id="mwBCU" rel="mw:WikiLink" title="Gull wing">gull-winged</a> <a href="./Flying_boat" id="mwBCY" rel="mw:WikiLink" title="Flying boat">flying boat</a> never entered military service, but data from its handling and engine <a href="./Steam_jet_cooling" id="mwBCc" rel="mw:WikiLink" title="Steam jet cooling">steam-cooling</a> aided the design of <a href="./Short_Brothers" id="mwBCg" rel="mw:WikiLink" title="Short Brothers">Short</a>'s <a href="./Short_Empire" id="mwBCk" rel="mw:WikiLink" title="Short Empire">Empire</a> and <a href="./Short_Sunderland" id="mwBCo" rel="mw:WikiLink" title="Short Sunderland">Sunderland</a> aircraft?