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//upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Keystone_Y1B-4_%28SN_30-281%29.jpg/520px-Keystone_Y1B-4_%28SN_30-281%29.jpg 2x" data-file-width="1800" data-file-height="1209" /></a><figcaption></figcaption></figure>Keystone Y1B-4 (S/N 30-281) di preserie</td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: #C6CADA;">Descrizione</th></tr><tr><th style="width:50%">Tipo</th><td><a href="/wiki/Bombardiere" title="Bombardiere">bombardiere</a> leggero </td></tr><tr><th style="width:50%"><a href="/wiki/Equipaggio" title="Equipaggio">Equipaggio</a></th><td>5 </td></tr><tr><th style="width:50%">Costruttore</th><td><span class="mw-image-border noviewer" typeof="mw:File"><a href="/wiki/File:Flag_of_the_United_States_(1912-1959).svg" class="mw-file-description" title="Stati Uniti (bandiera)"><img alt="Stati Uniti (bandiera)" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/20px-Flag_of_the_United_States_%281912-1959%29.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/30px-Flag_of_the_United_States_%281912-1959%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/40px-Flag_of_the_United_States_%281912-1959%29.svg.png 2x" data-file-width="1235" data-file-height="650" /></a></span> <a href="/wiki/Keystone_Aircraft" title="Keystone Aircraft">Keystone Aircraft</a> </td></tr><tr><th style="width:50%">Utilizzatore principale</th><td><span class="mw-image-border noviewer" typeof="mw:File"><a href="/wiki/File:Flag_of_the_United_States_(1912-1959).svg" class="mw-file-description" title="Stati Uniti (bandiera)"><img alt="Stati Uniti (bandiera)" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/20px-Flag_of_the_United_States_%281912-1959%29.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/30px-Flag_of_the_United_States_%281912-1959%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/40px-Flag_of_the_United_States_%281912-1959%29.svg.png 2x" data-file-width="1235" data-file-height="650" /></a></span> <a href="/wiki/United_States_Army_Air_Corps" title="United States Army Air Corps">USAAC</a> </td></tr><tr><th style="width:50%">Esemplari</th><td>5 Y1B-4<br />25 B-4A </td></tr><tr><th style="width:50%">Sviluppato dal</th><td><a href="/wiki/Keystone_B-3" title="Keystone B-3">Keystone B-3</a> </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: #C6CADA;">Dimensioni e pesi</th></tr><tr><th style="width:50%">Lunghezza</th><td>14,9 <a href="/wiki/Metro" title="Metro">m</a> (48 <a href="/wiki/Piede_(unit%C3%A0_di_misura)" title="Piede (unità di misura)">ft</a> 10 <a href="/wiki/Pollice_(unit%C3%A0_di_misura)" title="Pollice (unità di misura)">in</a>) </td></tr><tr><th style="width:50%"><a href="/wiki/Apertura_alare" title="Apertura alare">Apertura alare</a></th><td>22,8 m (74 ft 8 in) </td></tr><tr><th style="width:50%">Altezza</th><td>4,8 m (15 ft 9 in) </td></tr><tr><th style="width:50%"><a href="/wiki/Superficie_alare" title="Superficie alare">Superficie alare</a></th><td>106,4 <a href="/wiki/Metro_quadrato" title="Metro quadrato">m²</a> (1 145 <a href="/wiki/Piede_quadro" title="Piede quadro">ft²</a>) </td></tr><tr><th style="width:50%">Carico alare</th><td>55,22 kg/m²<br />(11.31 lb/ft²) </td></tr><tr><th style="width:50%">Peso a vuoto</th><td>3 607 <a href="/wiki/Chilogrammo" title="Chilogrammo">kg</a> (7 951 <a href="/wiki/Libbra" title="Libbra">lb</a>) </td></tr><tr><th style="width:50%">Peso carico</th><td>5 875 kg (12 952 lb) </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: #C6CADA;">Propulsione</th></tr><tr><th style="width:50%"><a href="/wiki/Motore_aeronautico" title="Motore aeronautico">Motore</a></th><td>due <a href="/wiki/Motore_radiale" title="Motore radiale">radiali</a> <a href="/w/index.php?title=Pratt_%26_Whitney_R-1860&action=edit&redlink=1" class="new" title="Pratt & Whitney R-1860 (la pagina non esiste)">Pratt & Whitney R-1860</a>-7 </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: #C6CADA;">Prestazioni</th></tr><tr><th style="width:50%">Velocità max</th><td>210 <a href="/wiki/Chilometro_orario" title="Chilometro orario">km/h</a><br />(130 <a href="/wiki/Miglio_orario" title="Miglio orario">mph</a>, 110 <a href="/wiki/Nodo_(unit%C3%A0_di_misura)" title="Nodo (unità di misura)">kt</a>) </td></tr><tr><th style="width:50%">Velocità di crociera</th><td>167 km/h<br />(103 mph, 90 kt) </td></tr><tr><th style="width:50%">Velocità di salita</th><td>177 m/min (580 ft/min) </td></tr><tr><th style="width:50%">Autonomia</th><td>1 400 <a href="/wiki/Chilometro" title="Chilometro">km</a><br />(850 <a href="/wiki/Miglio_(unit%C3%A0_di_misura)" title="Miglio (unità di misura)">mi</a>, 760 <a href="/wiki/Miglio_nautico" title="Miglio nautico">nmi</a>) </td></tr><tr><th style="width:50%"><a href="/wiki/Quota_di_tangenza" title="Quota di tangenza">Tangenza</a></th><td>4 267 m (14 000 ft) </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background-color: #C6CADA;">Armamento</th></tr><tr><th style="width:50%"><a href="/wiki/Mitragliatrice" title="Mitragliatrice">Mitragliatrici</a></th><td>3 <a href="/wiki/Browning_Arms_Company" title="Browning Arms Company">Browning</a> <a href="/wiki/Calibro_(armi)" title="Calibro (armi)">calibro</a> .303 in </td></tr><tr><th style="width:50%"><a href="/wiki/Bomba_aeronautica" title="Bomba aeronautica">Bombe</a></th><td>1 100 kg (2 500 lb) (normale)<br />1 800 kg (4 000 lb) (corto raggio) </td></tr><tr><th style="width:50%">Note</th><td>dati relativi alla versione B-4A </td></tr><tr><td colspan="2" class="sinottico_piede" style="background-color: #C6CADA;"><a href="/wiki/Categoria:Aerei_militari" title="Categoria:Aerei militari">voci di aerei militari presenti su Wikipedia</a> </td></tr></tbody></table> <p>Il <b>Keystone B-4</b> fu un <a href="/wiki/Bombardiere" title="Bombardiere">bombardiere</a> leggero bimotore e <a href="/wiki/Biplano" title="Biplano">biplano</a> sviluppato dall'<a href="/wiki/Azienda_aeronautica" title="Azienda aeronautica">azienda aeronautica</a> <a href="/wiki/Stati_Uniti_d%27America" title="Stati Uniti d'America">statunitense</a> <a href="/wiki/Keystone_Aircraft" title="Keystone Aircraft">Keystone Aircraft</a> nella prima metà degli <a href="/wiki/Anni_1930" title="Anni 1930">anni trenta</a> e destinato a equipaggiare i reparti della <a href="/wiki/United_States_Army_Air_Corps" title="United States Army Air Corps">United States Army Air Corps</a> (USAAC), l'allora <a href="/wiki/Aeronautica_militare" title="Aeronautica militare">componente aerea</a> del <a href="/wiki/United_States_Army" title="United States Army">U.S. Army</a>, l'<a href="/wiki/Esercito" title="Esercito">esercito</a> degli Stati Uniti d'America. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Storia_del_progetto">Storia del progetto</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=1" title="Modifica la sezione Storia del progetto" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=1" title="Edit section's source code: Storia del progetto"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nell'ambito della modernizzazione del proprio parco velivoli, lo United States Army emise una richiesta di fornitura per un nuovo modello adatto a missioni di <a href="/wiki/Bombardamento" title="Bombardamento">bombardamento</a> tattico, programma che diede origine alla <a href="/wiki/Designazione_degli_aerei_degli_Stati_Uniti_d%27America" class="mw-redirect" title="Designazione degli aerei degli Stati Uniti d'America">designazione</a> LB, <i>Light Bomber</i>. </p><p>Per rispondere a tale esigenza l'ufficio tecnico della Keystone Aircraft elaborò un ulteriore sviluppo del precedente <a href="/wiki/Keystone_B-3" title="Keystone B-3">LB-10</a>, a sua volta variante mono<a href="/wiki/Deriva_(aeronautica)" title="Deriva (aeronautica)">deriva</a> dell'<a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-6</a>, che già equipaggiava i reparti USAAC dalla fine del <a href="/wiki/Anni_1920" title="Anni 1920">decennio precedente</a>. Il nuovo modello, che assunse la designazione ufficiale U.S. Army <b>LB-13</b>, rimaneva sostanzialmente invariato rispetto al velivolo da cui era estrapolato, un aereo di grandi dimensioni dall'aspetto per l'epoca convenzionale, dalla <a href="/wiki/Ala_(aeronautica)" title="Ala (aeronautica)">velatura</a> <a href="/wiki/Biplano" title="Biplano">biplana</a> e <a href="/wiki/Carrello_d%27atterraggio" title="Carrello d'atterraggio">carrello d'atterraggio</a> fisso, con la sola eccezione dell'impianto propulsivo più potente, sempre dall'architettura <a href="/wiki/Motore_radiale" title="Motore radiale">radiale</a> ma abbandonando i precedenti <a href="/wiki/Pratt_%26_Whitney_R-1690" title="Pratt & Whitney R-1690">Pratt & Whitney R-1690</a> Hornet per i <a href="/w/index.php?title=Pratt_%26_Whitney_R-1860&action=edit&redlink=1" class="new" title="Pratt & Whitney R-1860 (la pagina non esiste)">Pratt & Whitney R-1860</a> Hornet B dotati di <a href="/wiki/Compressore" title="Compressore">compressore</a>. </p><p>Durante le ultime fasi di sviluppo e costruzione del <a href="/wiki/Prototipo" title="Prototipo">prototipo</a> lo U.S. Army abbandonò la designazione LB per passare semplicemente alla B (<i>Bomber</i>), con il modello che assunse in base alla nomenclatura allora in vigore la designazione <b>Y1B-4</b> destinata ai primi cinque esemplari di preserie. </p><p>La cellula del primo <a href="/wiki/Keystone_B-3" title="Keystone B-3">B-3A</a> realizzato (S/N 30-281) venne convertita allo standard Y1B-4 equipaggiandola con una coppia di motori R-1860-7 e dotando il carrello di <a href="/wiki/Pneumatico" title="Pneumatico">pneumatici</a> a bassa pressione. Grazie alla maggior potenza disponibile degli Hornet B, le prestazioni del Y1B-4 risultavano leggermente migliori di quelle del B-3, rimanendo questa l'unica sostanziale differenza tra i due modelli. Il 28 aprile 1931, l'esercito sottoscrisse un contratto di fornitura per 25 esemplari di una versione migliorata dell'Y1B-4 indicata come <b>Keystone B-4A</b>. Questa versione di produzione faceva parte dell'ultimo ordine emesso dall'Army Air Corps (assieme a 39 B-6A, identici se non per i motori che li equipaggiavano), e il B-4A, consegnato tra il gennaio e l'aprile del 1932, fu l'ultimo bombardiere biplano ad equipaggiare i reparti dell'Air Corps. </p> <div class="mw-heading mw-heading2"><h2 id="Impiego_operativo">Impiego operativo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=2" title="Modifica la sezione Impiego operativo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=2" title="Edit section's source code: Impiego operativo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il B-4 fu l'ultimo della serie di bombardieri biplani Keystone ordinati dallo U.S. Army alla fine del 1931. Il modello venne principalmente utilizzato in missioni di <a href="/wiki/Aereo_da_osservazione" title="Aereo da osservazione">osservazione</a> in collaborazione con l'<a href="/wiki/Artiglieria" title="Artiglieria">artiglieria</a> e ricognizione aerea fino all'inizio del <a href="/wiki/1934" title="1934">1934</a>, anno in cui venne introdotto in servizio operativo il rivoluzionario <a href="/wiki/Martin_B-10" title="Martin B-10">Martin B-10</a>B. Alcuni dei modelli sopravvissero fino ai primi <a href="/wiki/Anni_1940" title="Anni 1940">anni quaranta</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Varianti">Varianti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=3" title="Modifica la sezione Varianti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=3" title="Edit section's source code: Varianti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dt>LB-13</dt> <dd>designazione relativa a sette esemplari ma consegnati come Y1B-4 e <a href="/wiki/Keystone_B-6" title="Keystone B-6">Y1B-6</a> con differenti impianti propulsivi.</dd> <dt>Y1B-4</dt> <dd>designazione dei cinque esemplari di preserie, Del tutto simili agli <a href="/wiki/Keystone_B-3" title="Keystone B-3">LB-10</a> tranne che per l'installazione di una coppia di motori radiali <a href="/w/index.php?title=Pratt_%26_Whitney_R-1860&action=edit&redlink=1" class="new" title="Pratt & Whitney R-1860 (la pagina non esiste)">Pratt & Whitney R-1860</a>-7 da 575 hp (429 kW).</dd> <dt>B-4A</dt> <dd>versione di produzione in serie dell'Y1B-4, realizzata in 25 esemplari.</dd></dl> <div class="mw-heading mw-heading2"><h2 id="Utilizzatori">Utilizzatori</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=4" title="Modifica la sezione Utilizzatori" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=4" title="Edit section's source code: Utilizzatori"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dt><span style="white-space:nowrap" class="metadata"><span class="mw-image-border" typeof="mw:File"><a href="/wiki/File:Flag_of_the_United_States_(1912-1959).svg" class="mw-file-description" title="Stati Uniti"><img alt=" " src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/20px-Flag_of_the_United_States_%281912-1959%29.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/30px-Flag_of_the_United_States_%281912-1959%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Flag_of_the_United_States_%281912-1959%29.svg/40px-Flag_of_the_United_States_%281912-1959%29.svg.png 2x" data-file-width="1235" data-file-height="650" /></a></span> </span><a href="/wiki/Stati_Uniti_d%27America" title="Stati Uniti d'America">Stati Uniti</a></dt></dl> <ul><li><a href="/wiki/United_States_Army_Air_Corps" title="United States Army Air Corps">United States Army Air Corps</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=5" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=5" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><br /> </p> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=6" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=6" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite id="CITEREFWagner_1982" class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Ray Wagner, <a rel="nofollow" class="external text" href="https://archive.org/details/americancombatpl0000wagn"><span style="font-style:italic;">American Combat Planes</span></a>, New York, Doubleday, 1982, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-930083-17-2" title="Speciale:RicercaISBN/0-930083-17-2">0-930083-17-2</a>.</cite></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=7" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=7" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Keystone B-4"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Keystone_B-4?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Keystone_B-4?uselang=it">Keystone B-4</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Keystone_B-4&veaction=edit&section=8" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Keystone_B-4&action=edit&section=8" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Joseph F. Baugher, <a rel="nofollow" class="external text" href="http://www.joebaugher.com/usaf_bombers/b4.html"><span style="font-style:italic;">Keystone B-4</span></a>, su <span style="font-style:italic;">Encyclopedia of American Aircraft</span>, <a rel="nofollow" class="external free" href="http://home.att.net/~jbaugher/">http://home.att.net/~jbaugher/</a>, 11 luglio 1999. <small>URL consultato il 22 agosto 2015</small>.</cite></li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Maksim Starostin, <a rel="nofollow" class="external text" href="http://www.aviastar.org/air/usa/keystone_b-4.php"><span style="font-style:italic;">Keystone B-4</span></a>, su <span style="font-style:italic;">Virtual Aircraft Museum</span>, <a rel="nofollow" class="external free" href="http://www.aviastar.org/index2.html">http://www.aviastar.org/index2.html</a>. <small>URL consultato il 22 agosto 2015</small>.</cite></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Bombardieri_USA"><tbody><tr><th colspan="3"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Bombardieri_USA" title="Template:Bombardieri USA"><span title="Vai alla pagina del template">V</span></a> · <a href="/wiki/Discussioni_template:Bombardieri_USA" title="Discussioni template:Bombardieri USA"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Bombardieri_USA&action=edit"><span title="Modifica il template. Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Designazione degli aerei da bombardamento impiegati da <a href="/wiki/United_States_Army_Air_Service" title="United States Army Air Service">USAAS</a>/<a href="/wiki/United_States_Army_Air_Corps" title="United States Army Air Corps">USAAC</a>/<a href="/wiki/United_States_Army_Air_Forces" title="United States Army Air Forces">USAAF</a>/<a href="/wiki/United_States_Air_Force" title="United States Air Force">USAF</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="background:#d3d3d3; color:#000;">Anni 1919–1924</th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox" style="text-align: left;"><tbody><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«DB» <br /> <small><i>Day Bombardment</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/wiki/Gallaudet_DB-1" title="Gallaudet DB-1">DB-1</a><b> ·</b> <a href="/w/index.php?title=Martin_MB-1&action=edit&redlink=1" class="new" title="Martin MB-1 (la pagina non esiste)">MB-1</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«NBS» <br /> <small><i>Night Bombardment, Short Distance</i></small></th><td colspan="1" style="background:#dcdcdc; color:#000;"><a href="/wiki/Martin_NBS-1" title="Martin NBS-1">NBS-1</a><b> ·</b> <a href="/w/index.php?title=Lowe-Willard-Fowler_XNBS-2&action=edit&redlink=1" class="new" title="Lowe-Willard-Fowler XNBS-2 (la pagina non esiste)">NBS-2</a><b> ·</b> <a href="/w/index.php?title=Elias_XNBS-3&action=edit&redlink=1" class="new" title="Elias XNBS-3 (la pagina non esiste)">NBS-3</a><b> ·</b> <a href="/wiki/Curtiss_XNBS-4" title="Curtiss XNBS-4">NBS-4</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«NBL» <br /> <small><i>Night Bombardment, Long Distance</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/wiki/Witteman-Lewis_XNBL-1" title="Witteman-Lewis XNBL-1">NBL-1</a><b> ·</b> <a href="/w/index.php?title=Martin_XNBL-2&action=edit&redlink=1" class="new" title="Martin XNBL-2 (la pagina non esiste)">NBL-2</a></td></tr></tbody></table></td><td rowspan="4" class="navbox_image"><span typeof="mw:File"><a href="/wiki/File:Martin_MB-2_SN_AS_64195,_P162_061219-F-1234S-020.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg/140px-Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg" decoding="async" width="140" height="91" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg/210px-Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg/280px-Martin_MB-2_SN_AS_64195%2C_P162_061219-F-1234S-020.jpg 2x" data-file-width="1800" data-file-height="1172" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:Martin-B-10B.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Martin-B-10B.jpg/140px-Martin-B-10B.jpg" decoding="async" width="140" height="93" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Martin-B-10B.jpg/210px-Martin-B-10B.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Martin-B-10B.jpg/280px-Martin-B-10B.jpg 2x" data-file-width="763" data-file-height="509" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:B29.maxwell.750pix.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/B29.maxwell.750pix.jpg/140px-B29.maxwell.750pix.jpg" decoding="async" width="140" height="96" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/B29.maxwell.750pix.jpg/210px-B29.maxwell.750pix.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/26/B29.maxwell.750pix.jpg/280px-B29.maxwell.750pix.jpg 2x" data-file-width="860" data-file-height="587" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:B-2_first_flight_071201-F-9999J-034.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/B-2_first_flight_071201-F-9999J-034.jpg/140px-B-2_first_flight_071201-F-9999J-034.jpg" decoding="async" width="140" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/B-2_first_flight_071201-F-9999J-034.jpg/210px-B-2_first_flight_071201-F-9999J-034.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3f/B-2_first_flight_071201-F-9999J-034.jpg/280px-B-2_first_flight_071201-F-9999J-034.jpg 2x" data-file-width="2978" data-file-height="2398" /></a></span></td></tr><tr><th colspan="1" class="navbox_group" style="background:#d3d3d3; color:#000;">Anni 1924–1930</th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox" style="text-align: left;"><tbody><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«LB» - <small><i>Light Bomber</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/w/index.php?title=Huff-Daland_LB-1&action=edit&redlink=1" class="new" title="Huff-Daland LB-1 (la pagina non esiste)">LB-1</a><b> ·</b> <a href="/wiki/Fokker_F.10" title="Fokker F.10">LB-2</a><b> ·</b> <a href="/w/index.php?title=Keystone_XLB-3&action=edit&redlink=1" class="new" title="Keystone XLB-3 (la pagina non esiste)">LB-3</a><b> ·</b> <a href="/w/index.php?title=Martin_XLB-4&action=edit&redlink=1" class="new" title="Martin XLB-4 (la pagina non esiste)">LB-4</a><b> ·</b> <a href="/w/index.php?title=Keystone_B-5&action=edit&redlink=1" class="new" title="Keystone B-5 (la pagina non esiste)">LB-5</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-6</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-7</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-8</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-9</a><b> ·</b> <a href="/wiki/Keystone_B-3" title="Keystone B-3">LB-10</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-11</a><b> ·</b> <a href="/w/index.php?title=Keystone_LB-6&action=edit&redlink=1" class="new" title="Keystone LB-6 (la pagina non esiste)">LB-12</a><b> ·</b> <a class="mw-selflink selflink">LB-13</a><b> ·</b> <a href="/w/index.php?title=Keystone_B-5&action=edit&redlink=1" class="new" title="Keystone B-5 (la pagina non esiste)">LB-14</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«B» - <small><i>Bomber</i></small></th><td colspan="1" style="background:#dcdcdc; color:#000;"><a href="/wiki/Huff-Daland_XB-1" title="Huff-Daland XB-1">B-1</a><b> ·</b> <a href="/wiki/Curtiss_B-2_Condor" title="Curtiss B-2 Condor">B-2</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«HB» - <small><i>Heavy Bomber</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/wiki/Huff-Daland_XHB-1" title="Huff-Daland XHB-1">HB-1</a><b> ·</b> <a href="/w/index.php?title=Fokker_XHB-2&action=edit&redlink=1" class="new" title="Fokker XHB-2 (la pagina non esiste)">HB-2</a><b> ·</b> <a href="/w/index.php?title=Huff-Daland_XHB-3&action=edit&redlink=1" class="new" title="Huff-Daland XHB-3 (la pagina non esiste)">HB-3</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#d3d3d3; color:#000;">Anni 1930–1962</th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox" style="text-align: left;"><tbody><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«A» <br /> <small><i>Attack / Light Bomber</i></small></th><td colspan="1" style="background:#dcdcdc; color:#000;"><a href="/wiki/Douglas_A-20_Havoc/Boston" title="Douglas A-20 Havoc/Boston">A-20</a><b> ·</b> <a href="/wiki/Douglas_A-26_Invader" title="Douglas A-26 Invader">A-26</a><b> ·</b> <a href="/wiki/North_American_A-36_Apache" title="North American A-36 Apache">A-36</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«B» <br /> <small><i>Bomber</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/wiki/Huff-Daland_XB-1" title="Huff-Daland XB-1">B-1</a><b> ·</b> <a href="/wiki/Curtiss_B-2_Condor" title="Curtiss B-2 Condor">B-2</a><b> ·</b> <a href="/wiki/Keystone_B-3" title="Keystone B-3">B-3</a><b> ·</b> <a class="mw-selflink selflink">B-4</a><b> ·</b> <a href="/w/index.php?title=Keystone_B-5&action=edit&redlink=1" class="new" title="Keystone B-5 (la pagina non esiste)">B-5</a><b> ·</b> <a href="/wiki/Keystone_B-6" title="Keystone B-6">B-6</a><b> ·</b> <a href="/wiki/Douglas_Y1B-7" title="Douglas Y1B-7">B-7</a><b> ·</b> <a href="/wiki/Fokker_XB-8" title="Fokker XB-8">B-8</a><b> ·</b> <a href="/wiki/Boeing_Y1B-9" title="Boeing Y1B-9">B-9</a><b> ·</b> <a href="/wiki/Martin_B-10" title="Martin B-10">B-10</a><b> ·</b> <a href="/wiki/Douglas_YOA-5" title="Douglas YOA-5">B-11</a><b> ·</b> <a href="/wiki/Martin_B-10" title="Martin B-10">B-12</a><b> ·</b> <a href="/wiki/Martin_B-10" title="Martin B-10">B-13</a><b> ·</b> <a href="/wiki/Martin_B-10" title="Martin B-10">B-14</a><b> ·</b> <a href="/wiki/Boeing_XB-15" title="Boeing XB-15">B-15</a><b> ·</b> <a href="/w/index.php?title=Martin_XB-16&action=edit&redlink=1" class="new" title="Martin XB-16 (la pagina non esiste)">B-16</a><b> ·</b> <a href="/wiki/Boeing_B-17_Flying_Fortress" title="Boeing B-17 Flying Fortress">B-17</a><b> ·</b> <a href="/wiki/Douglas_B-18_Bolo" title="Douglas B-18 Bolo">B-18</a><b> ·</b> <a href="/wiki/Douglas_XB-19_Hemisphere" title="Douglas XB-19 Hemisphere">B-19</a><b> ·</b> <a href="/w/index.php?title=Boeing_Y1B-20&action=edit&redlink=1" class="new" title="Boeing Y1B-20 (la pagina non esiste)">B-20</a><b> ·</b> <a href="/wiki/North_American_XB-21" title="North American XB-21">B-21</a><b> ·</b> <a href="/wiki/Douglas_B-18_Bolo" title="Douglas B-18 Bolo">B-22</a><b> ·</b> <a href="/wiki/Douglas_B-23_Dragon" title="Douglas B-23 Dragon">B-23</a><b> ·</b> <a href="/wiki/Consolidated_B-24_Liberator" title="Consolidated B-24 Liberator">B-24</a><b> ·</b> <a href="/wiki/North_American_B-25_Mitchell" title="North American B-25 Mitchell">B-25</a><b> ·</b> <a href="/wiki/Martin_B-26_Marauder" title="Martin B-26 Marauder">B-26</a><b> ·</b> <a href="/w/index.php?title=Martin_XB-27&action=edit&redlink=1" class="new" title="Martin XB-27 (la pagina non esiste)">B-27</a><b> ·</b> <a href="/wiki/North_American_XB-28_Dragon" title="North American XB-28 Dragon">B-28</a><b> ·</b> <a href="/wiki/Boeing_B-29_Superfortress" title="Boeing B-29 Superfortress">B-29</a><b> ·</b> <a href="/w/index.php?title=Lockheed_XB-30&action=edit&redlink=1" class="new" title="Lockheed XB-30 (la pagina non esiste)">B-30</a><b> ·</b> <a href="/w/index.php?title=Douglas_XB-31&action=edit&redlink=1" class="new" title="Douglas XB-31 (la pagina non esiste)">B-31</a><b> ·</b> <a href="/wiki/Consolidated_B-32_Dominator" title="Consolidated B-32 Dominator">B-32</a><b> ·</b> <a href="/w/index.php?title=Martin_XB-33_Super_Marauder&action=edit&redlink=1" class="new" title="Martin XB-33 Super Marauder (la pagina non esiste)">B-33</a><b> ·</b> <a href="/wiki/Lockheed_Ventura" title="Lockheed Ventura">B-34</a><b> ·</b> <a href="/wiki/Northrop_YB-35" title="Northrop YB-35">B-35</a><b> ·</b> <a href="/wiki/Convair_B-36" title="Convair B-36">B-36</a><b> ·</b> <a href="/wiki/Lockheed_Ventura" title="Lockheed Ventura">B-37</a><b> ·</b> <a href="/wiki/Boeing_XB-38_Flying_Fortress" title="Boeing XB-38 Flying Fortress">B-38</a><b> ·</b> <a href="/w/index.php?title=Boeing_XB-39_Superfortress&action=edit&redlink=1" class="new" title="Boeing XB-39 Superfortress (la pagina non esiste)">B-39</a><b> ·</b> <a href="/wiki/Boeing_YB-40_Flying_Fortress" title="Boeing YB-40 Flying Fortress">B-40</a><b> ·</b> <a href="/wiki/Consolidated_XB-41_Liberator" title="Consolidated XB-41 Liberator">B-41</a><b> ·</b> <a href="/wiki/Douglas_XB-42_Mixmaster" title="Douglas XB-42 Mixmaster">B-42</a><b> ·</b> <a href="/wiki/Douglas_XB-43" title="Douglas XB-43">B-43</a><b> ·</b> <a href="/wiki/Boeing_B-50_Superfortress" title="Boeing B-50 Superfortress">B-44</a><b> ·</b> <a href="/wiki/North_American_B-45_Tornado" title="North American B-45 Tornado">B-45</a><b> ·</b> <a href="/wiki/Convair_XB-46" title="Convair XB-46">B-46</a><b> ·</b> <a href="/wiki/Boeing_B-47_Stratojet" title="Boeing B-47 Stratojet">B-47</a><b> ·</b> <a href="/wiki/Martin_XB-48" title="Martin XB-48">B-48</a><b> ·</b> <a href="/wiki/Northrop_YB-49" title="Northrop YB-49">B-49</a><b> ·</b> <a href="/wiki/Boeing_B-50_Superfortress" title="Boeing B-50 Superfortress">B-50</a><b> ·</b> <a href="/wiki/Martin_XB-51" title="Martin XB-51">B-51</a><b> ·</b> <a href="/wiki/Boeing_B-52_Stratofortress" title="Boeing B-52 Stratofortress">B-52</a><b> ·</b> <a href="/wiki/Convair_XB-53" title="Convair XB-53">B-53</a><b> ·</b> <a href="/w/index.php?title=Boeing_B-54&action=edit&redlink=1" class="new" title="Boeing B-54 (la pagina non esiste)">B-54</a><b> ·</b> <a href="/w/index.php?title=Boeing_XB-55&action=edit&redlink=1" class="new" title="Boeing XB-55 (la pagina non esiste)">B-55</a><b> ·</b> <a href="/w/index.php?title=Boeing_XB-56&action=edit&redlink=1" class="new" title="Boeing XB-56 (la pagina non esiste)">B-56</a><b> ·</b> <a href="/wiki/Martin_B-57_Canberra" title="Martin B-57 Canberra">B-57</a><b> ·</b> <a href="/wiki/Convair_B-58_Hustler" title="Convair B-58 Hustler">B-58</a><b> ·</b> <a href="/w/index.php?title=Boeing_XB-59&action=edit&redlink=1" class="new" title="Boeing XB-59 (la pagina non esiste)">B-59</a><b> ·</b> <a href="/wiki/Convair_YB-60" title="Convair YB-60">B-60</a><b> ·</b> <a href="/wiki/MGM-1_Matador" title="MGM-1 Matador">B-61</a><b> ·</b> <a href="/wiki/SM-62_Snark" title="SM-62 Snark">B-62</a><b> ·</b> <a href="/w/index.php?title=GAM-63_RASCAL&action=edit&redlink=1" class="new" title="GAM-63 RASCAL (la pagina non esiste)">B-63</a><b> ·</b> <a href="/wiki/North_American_SM-64_Navaho" title="North American SM-64 Navaho">B-64</a><b> ·</b> <a href="/wiki/SM-65_Atlas" title="SM-65 Atlas">B-65</a><b> ·</b> <a href="/wiki/Douglas_B-66_Destroyer" title="Douglas B-66 Destroyer">B-66</a><b> ·</b> <a href="/w/index.php?title=GAM-67_Crossbow&action=edit&redlink=1" class="new" title="GAM-67 Crossbow (la pagina non esiste)">B-67</a><b> ·</b> <a href="/wiki/Martin_XB-68" title="Martin XB-68">B-68</a><b> ·</b> <a href="/wiki/Lockheed_P2V_Neptune" title="Lockheed P2V Neptune">RB-69</a><b> ·</b> <a href="/wiki/North_American_XB-70_Valkyrie" title="North American XB-70 Valkyrie">B-70</a></td></tr><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«BLR» <br /> <small><i>Bomber Long Range</i></small></th><td colspan="1" style="background:#dcdcdc; color:#000;"><a href="/wiki/Boeing_XB-15" title="Boeing XB-15">BLR-1</a><b> ·</b> <a href="/wiki/Douglas_XB-19_Hemisphere" title="Douglas XB-19 Hemisphere">BLR-2</a><b> ·</b> <a href="/w/index.php?title=Sikorsky_XBLR-3&action=edit&redlink=1" class="new" title="Sikorsky XBLR-3 (la pagina non esiste)">BLR-3</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#d3d3d3; color:#000;">Anni 1962 - oggi</th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox" style="text-align: left;"><tbody><tr><th class="subnavbox_group" style="text-align: left; width:12em; background: #87cefa; color:#000;">«B» - <small><i>Bomber</i></small></th><td colspan="1" style="background:#f0f8ff; color:#000;"><a href="/wiki/Rockwell_B-1_Lancer" title="Rockwell B-1 Lancer">B-1</a><b> ·</b> <a href="/wiki/Northrop_Grumman_B-2_Spirit" title="Northrop Grumman B-2 Spirit">B-2</a><b> ·</b> <a href="/wiki/Northrop_Grumman_B-21_Raider" title="Northrop Grumman B-21 Raider">B-21</a></td></tr></tbody></table></td></tr></tbody></table> <div class="noprint" style="width:100%; padding: 3px 0; display: flex; 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