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Lockheed Have Blue was the code name for Lockheed's proof of concept demonstrator for a stealth bomber. Have Blue was designed by Lockheed's Skunk Works division, and tested at Groom Lake, Nevada. The Have Blue was the first fixed-wing aircraft whose external shape was defined by radar engineering rather than by aerospace engineering. The aircraft's faceted shape was designed to deflect electromagnetic waves in directions other than that of the originating radar emitter, greatly reducing its radar cross-section.

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dbo:abstract
  • لوكهيد هاف بلو (Lockheed Have Blue) هو اسم رمزي لطائرة تجريبية لإثبات مفهوم طائرة تتحدى الرادار والتي أدت إلى إنتاج طائرة إف - 117 نايت هوك الشبح. تم تصميم الطائرة من قبل قسم «سكانك ووركس» التابع لشركة لوكهيد وتم اختبارها في بحيرة غروم في نيفادا. تعتبر أول طائرة بجناحين ثابتين الذي تم تصميم شكله الخارجي من قبل فريق هندسة الرادار بدلا من فريق هندسة الطيران. تم تصميم الطائرة على شكل لوحة تهدف إلى تشتيت الموجات الكهرومغناطيسية التي تطلقها الرادارات في اتجاهات بعيدة عن الرادار الذي يرسلها، وبالتالي، تحد من قدرة الرادارات على اكتشافها. تم بناء نموذجين منها ولكنهما تحطما خلال اختبار الطائرة. (ar)
  • Have Blue war der Codename eines hoch geheimen Programms zur Entwicklung eines Tarnkappenflugzeugs durch die Sonderentwicklungsabteilung Skunk Works des US-amerikanischen Herstellers Lockheed. Aus den beiden Erprobungsträgern Have Blue Experimental Survivable Testbed (XST) ging die F-117A Nighthawk hervor. (de)
  • El Lockheed Have Blue fue el nombre en clave para un prototipo del programa stealth de la Lockheed que precedió a la producción del proyecto del avión furtivo F-117 Nighthawk. Diseñado por los Programas de Desarrollo Avanzado de la Lockheed, ahora Programas de Desarrollo Avanzado de la Lockheed Martin, más conocida como Skunk Works, Have Blue fue desarrollado en la secreta base Área 51, cerca de Rachel, Nevada. Have Blue fue la primera aeronave de ala fija diseñada desde una perspectiva de ingeniería eléctrica (en lugar de una aerodinámica). Las formas y los ángulos con matices de la aeronave fueron diseñadas para desviar las ondas electromagnéticas, reduciendo así en gran medida su identificación en el radar. (es)
  • Lockheed Have Blue was the code name for Lockheed's proof of concept demonstrator for a stealth bomber. Have Blue was designed by Lockheed's Skunk Works division, and tested at Groom Lake, Nevada. The Have Blue was the first fixed-wing aircraft whose external shape was defined by radar engineering rather than by aerospace engineering. The aircraft's faceted shape was designed to deflect electromagnetic waves in directions other than that of the originating radar emitter, greatly reducing its radar cross-section. To design the aircraft, the Skunk Works' design team leveraged the mathematics published by Soviet physicist and mathematician Petr Ufimtsev regarding the reflection of electromagnetic waves. A stealth engineer at Lockheed, Denys Overholser, had read the publication and realized that Ufimtsev had created the mathematical theory and tools to do finite analysis of radar reflection. The eventual design characteristically featured faceted surfaces to deflect radar waves away from a radar receiver. It had highly-swept wings and inward-canted vertical stabilizers, which led to it being nicknamed "the Hopeless Diamond"—a pun on the Hope Diamond. The first operational aircraft made its maiden flight on 1 December 1977. Two flyable vehicles were constructed. Both were lost due to mechanical problems. Nevertheless, Have Blue was deemed a success, paving the way for the first operational stealth aircraft, Senior Trend, or Lockheed F-117A Nighthawk. (en)
  • Le Lockheed Have Blue est un démonstrateur destiné à tester des dispositifs combinés de furtivité. Il fut le précurseur du célèbre avion d'attaque au sol Lockheed Martin F-117 Nighthawk. (fr)
  • Lockheed Have Blue adalah nama kode untuk demonstrator Lockheed (yaitu, "bukti dari konsep") yang mendahului pesawat siluman produksi Nighthawk F-117. Have Blue dirancang oleh divisi Skunk Works Lockheed, dan diuji di Groom Lake, Nevada. Have Blue adalah pesawat sayap tetap yang pertama dirancang dari perspektif teknik elektro (daripada teknik kedirgantaraan). Pesawat itu seperti pelat, bentuk faceted dirancang untuk membelokkan gelombang elektromagnetik, sangat mengurangi sinyal radar. Dua kendaraan dibangun dapat diterbangi, tetapi keduanya jatuh selama uji program penerbangan. (in)
  • 록히드 해브 블루는 록히드가 개발한 개념 증명 시제기이다. (ko)
  • Lockheed XST/Have Blue o più semplicemente Have Blue, era il nome in codice del programma dimostrativo (PoC) avviato dalla Lockheed Corporation onde gettare le basi per la produzione di aerei VLO (Very Low Observable) e sviluppare gli aspetti legati a questa tecnologia. Gli studi condotti sui due prototipi Have Blue furono essenziali per la realizzazione del bombardiere stealth F-117 Nighthawk. Il programma fu condotto dagli Skunk Works, la sezione veicoli sperimentali della Lockheed, e sviluppato all'interno dell'Area 51 tra il 1977 e il 1979. Entrambi i prototipi andarono distrutti nel corso di due incidenti. I prototipi Have Blue sono stati i primi aerei ad essere completamente progettati tramite l'ausilio di calcolatori elettronici che permettevano di valutare in breve tempo la sezione radar equivalente, in inglese Radar Cross Section (RCS), di diversi modelli e di determinare quale fosse quella con le migliori caratteristiche VLO. Il modello ideale si rivelò essere quello di un aereo ad ala a freccia con superfici piane inclinate come un diamante onde deviare le onde radar. Da qui il soprannome di "Diamante senza speranza". Senza speranza in quanto inizialmente l'aspetto tozzo e sgraziato non sembrava addirsi ad un veicolo in grado di volare.Have Blue è stato anche il primo veicolo a fare uso esclusivo della tecnologia FBW (Fly-by-wire) proprio perché il suo design era intrinsecamente instabile e solo l'utilizzo di un computer che controllasse i parametri di volo istante per istante lo avrebbe reso stabile. Proprio per questo un sistema di comandi diretti di emergenza, come già avveniva sullo F-16, sarebbe stato inutile dal momento che sarebbe stato impossibile controllarlo. Have Blue faceva parte della realtà dei "black projects", ovvero quei programmi classificati che ufficialmente non esistono. Parte del programma fu declassificato sul finire degli anni ottanta quando fu resa pubblica l'esistenza dello F-117. (it)
  • Have Blue era o nome de código do protótipo de ataque furtivo stealth da Lockheed que precedeu o F-117 Nighthawk. O Have Blue foi o primeiro avião a ser concebido a partir de uma perspectiva de engenharia eléctrica (em oposição à tradicional aerodinâmica). As formas e ângulos do avião foram desenhadas para reflectir ondas electromagnéticas, tornando o avião invisível ao radar. Foram construídos dois protótipos Have Blue para testar a dinâmica de voo e detecção por radar deste conceito stealth. Os protótipos voaram em Groom Lake, Nevada, entre 1977 e 1979. O modelo era aerodinamicamente instável. Ambos aviões despenharam-se e os detritos enterrados perto do leito do lago. (pt)
  • 擁藍試驗機是洛克希德公司製造的概念驗證機,其後發展為F-117夜鷹戰鬥攻擊機。 (zh)
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  • * List of experimental aircraft * List of Lockheed aircraft (en)
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  • Crickmore, Donald, Aronstein and Piccirillo (en)
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  • * Lockheed F-117 Nighthawk * Lockheed Senior Prom (en)
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  • * Northrop Tacit Blue * MBB Lampyridae (en)
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  • لوكهيد هاف بلو (Lockheed Have Blue) هو اسم رمزي لطائرة تجريبية لإثبات مفهوم طائرة تتحدى الرادار والتي أدت إلى إنتاج طائرة إف - 117 نايت هوك الشبح. تم تصميم الطائرة من قبل قسم «سكانك ووركس» التابع لشركة لوكهيد وتم اختبارها في بحيرة غروم في نيفادا. تعتبر أول طائرة بجناحين ثابتين الذي تم تصميم شكله الخارجي من قبل فريق هندسة الرادار بدلا من فريق هندسة الطيران. تم تصميم الطائرة على شكل لوحة تهدف إلى تشتيت الموجات الكهرومغناطيسية التي تطلقها الرادارات في اتجاهات بعيدة عن الرادار الذي يرسلها، وبالتالي، تحد من قدرة الرادارات على اكتشافها. تم بناء نموذجين منها ولكنهما تحطما خلال اختبار الطائرة. (ar)
  • Have Blue war der Codename eines hoch geheimen Programms zur Entwicklung eines Tarnkappenflugzeugs durch die Sonderentwicklungsabteilung Skunk Works des US-amerikanischen Herstellers Lockheed. Aus den beiden Erprobungsträgern Have Blue Experimental Survivable Testbed (XST) ging die F-117A Nighthawk hervor. (de)
  • El Lockheed Have Blue fue el nombre en clave para un prototipo del programa stealth de la Lockheed que precedió a la producción del proyecto del avión furtivo F-117 Nighthawk. Diseñado por los Programas de Desarrollo Avanzado de la Lockheed, ahora Programas de Desarrollo Avanzado de la Lockheed Martin, más conocida como Skunk Works, Have Blue fue desarrollado en la secreta base Área 51, cerca de Rachel, Nevada. Have Blue fue la primera aeronave de ala fija diseñada desde una perspectiva de ingeniería eléctrica (en lugar de una aerodinámica). Las formas y los ángulos con matices de la aeronave fueron diseñadas para desviar las ondas electromagnéticas, reduciendo así en gran medida su identificación en el radar. (es)
  • Le Lockheed Have Blue est un démonstrateur destiné à tester des dispositifs combinés de furtivité. Il fut le précurseur du célèbre avion d'attaque au sol Lockheed Martin F-117 Nighthawk. (fr)
  • Lockheed Have Blue adalah nama kode untuk demonstrator Lockheed (yaitu, "bukti dari konsep") yang mendahului pesawat siluman produksi Nighthawk F-117. Have Blue dirancang oleh divisi Skunk Works Lockheed, dan diuji di Groom Lake, Nevada. Have Blue adalah pesawat sayap tetap yang pertama dirancang dari perspektif teknik elektro (daripada teknik kedirgantaraan). Pesawat itu seperti pelat, bentuk faceted dirancang untuk membelokkan gelombang elektromagnetik, sangat mengurangi sinyal radar. Dua kendaraan dibangun dapat diterbangi, tetapi keduanya jatuh selama uji program penerbangan. (in)
  • 록히드 해브 블루는 록히드가 개발한 개념 증명 시제기이다. (ko)
  • 擁藍試驗機是洛克希德公司製造的概念驗證機,其後發展為F-117夜鷹戰鬥攻擊機。 (zh)
  • Lockheed Have Blue was the code name for Lockheed's proof of concept demonstrator for a stealth bomber. Have Blue was designed by Lockheed's Skunk Works division, and tested at Groom Lake, Nevada. The Have Blue was the first fixed-wing aircraft whose external shape was defined by radar engineering rather than by aerospace engineering. The aircraft's faceted shape was designed to deflect electromagnetic waves in directions other than that of the originating radar emitter, greatly reducing its radar cross-section. (en)
  • Lockheed XST/Have Blue o più semplicemente Have Blue, era il nome in codice del programma dimostrativo (PoC) avviato dalla Lockheed Corporation onde gettare le basi per la produzione di aerei VLO (Very Low Observable) e sviluppare gli aspetti legati a questa tecnologia. Gli studi condotti sui due prototipi Have Blue furono essenziali per la realizzazione del bombardiere stealth F-117 Nighthawk. Il programma fu condotto dagli Skunk Works, la sezione veicoli sperimentali della Lockheed, e sviluppato all'interno dell'Area 51 tra il 1977 e il 1979. Entrambi i prototipi andarono distrutti nel corso di due incidenti. (it)
  • Have Blue era o nome de código do protótipo de ataque furtivo stealth da Lockheed que precedeu o F-117 Nighthawk. O Have Blue foi o primeiro avião a ser concebido a partir de uma perspectiva de engenharia eléctrica (em oposição à tradicional aerodinâmica). As formas e ângulos do avião foram desenhadas para reflectir ondas electromagnéticas, tornando o avião invisível ao radar. (pt)
rdfs:label
  • لوكهيد هاف بلو (ar)
  • Lockheed Have Blue (de)
  • Lockheed Have Blue (es)
  • Lockheed Have Blue (in)
  • Lockheed Have Blue (it)
  • Lockheed Have Blue (fr)
  • Lockheed Have Blue (en)
  • 록히드 해브 블루 (ko)
  • Lockheed Have Blue (pt)
  • 擁藍試驗機 (zh)
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