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Boeing B-17 FLYING FORTRESS

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Boeing B-17 mu kabyiniriro kayo “Flying Fortress” mu Kinyarwanda bisobanura inzu y umutamenwa iguruka. Impamvu nuko yari bombardier ariko ikirenzeho ikaba yarabashaga kwirindira umutekano aho yari ifite imbunda zigera muri 13 za 12.7 mm machine guns zivuye kuri 5 ubwo yatangiraga gukorwa. Ikindi nuko iyi yarasiraga mu ntera yo hejuru kure cyane ndetse inanyaruka ku muvuduko wari ntagereranywa ikindi kandi inakomeye kuko yabashaga gusubira ku bibuga by indege yahagurukiyeho yarashweho bikomeye cyane n umwanzi abayigize batahungabanyijwe cyane n amasau yabo bahanganye.

Boeing B 17 yagize ibikorwa bikomeye uhereye kuri version yayo ya mbere kugeza kuya nyuma. Gusa iyi ni indege yamamaye mu ntambara ya kabiri y isi (WW II) ubwo yakoreshwaga iyogoza amato, indege ndetse n inganda z abanzi bari bahanganye n ibihugu byishize hamwe ngo birwanye abanazi n abayapani. Mu matoni y amabombe yarashwe ndetse yasutswe n indege z abanyamerika mu ntambara ya kabiri y isi ku butaka bw abanazi n ubwo bagenzuraga muri toni miriyoni 1.5 zasutswe n indege, B 17 niyo yasutse ibisasu byinshi aho ibarirwa mu matoni bihumbi 640 by amabombe yituye ku butaka bw abanazi mu ntambara ya kabiri y isi. Iyi ndege yakozwe n abanyamerika ahagana mu mwaka w I 1935 ariko itangira kuguruka 1938 nuko ihagarikwa mu gukoreshwa bwanyuma mu mwaka w i 1968 mu gisirikare cya Brazil kirwanira mu kirere.

Mu 1934 tariki 8 z ukwa munani United States Army Air Corps (USAAC) yashyize kw isoko ipiganwa ku kubaka indege z intambara zagombaga kuba zifite engines/ moteri nyinshi zagombaga gusimbura izitwaga Martin B-10. Izi  bazishakaga ngo zijye gutanga umusaada ku barwanira mu kirere mu birwa bya Hawaii, Panama ndetse na Alaska. Ibisabwa byari ukuba yatwara imizigo y amabombe iremereye cyane ku butumburuke bwa metero 3 000 mu gihe cy amasaha 10 igendera ku muvuduko wa 200 mph cyangwa se 320km/h.Ikindi USAAC yifuzaga nubwo bitari mu bisabwa byari ukuba iyi ndege yagenda ibirometero 3 200 ku muvuduko w ibirometero 400 ku isaha (400 km/h). Aha Boeing yagiye mu ipiganwa ihanganye na Douglas yari yazanye type yayo ya Douglas DB-1 ndetse na Martin Model 146 ku kibuga cy indege cya Wilbur Wright muri Dayton, Ohio muri Leta zunze ubumwe za Amerika. Boeing B 17 Model 299 yabo yari yakozwe n abenjenyeri bayobowe na E. Gifford  Emery na Edward Curtis Wells ifite imbunda 5 za 30 caliber (7.62mm) machine guns ishobora kwikorera toni 2.2 by ibisasu iyi ndege yari itwawe na moteri 4 za Pratt & Whitney R-1690 buri imwe ikora 750hp (600 Kw) ku butumburuke bwa metero 2 100.

Tariki 27 Nyakanga 1935 umunyamakuru Richard Williams w ikinyamakuru Seattle Times nyuma yo kubona izo mbunda B 17 Model 299 niwe wavuze ati iyi ni 15 ton flying fortress niko guhimbwa “Flying Fortress”. Bwa mbere yagurutse tariki 28 Nyakanga 1935 itwawe n umukuru w aba pilote bakora amatests muri Boeing witwaga Leslie Tower. Tariki 20 Kanama 1935 nibwo iyi prototype ya B 17 yahagurutse iva ku kibuga cy indege cya Seattle yerekeza ku cya Wright Field mu masaha 9 n iminota 3 aha ni mu ntera y ibirometero 3 800 aho yagenderaga ku muvuduko wa 406 km/h aho yasumbaga umuvuduko wari watswe mu marushanwa y isoko isumba kure mu bubasha iza DB-1 ndetse na Model 146. Gusa tariki 30 Ukwakira 1935 nibwo Major Ployer Peter Hill wo muri USAAC ndetse na Les Tower bagurutsaga Model 299 bwa kabiri muri test yayo ya kabiri gusa bakibagirwa gukuramo icyitwa “gust locks” ibi byatumye indege ibura control iri mu kirere niko gukora impanuka ibica bombi. Iyi mpanuka niyo yatumye Boeing idatsindira iri soko niko kuriha Douglas kuri 58 200$ yicyo gihe ubu ahwanye na miriyoni 1.09 $ y ubu. Mu gihe Boeing yagombaga kubona $99 620 bihwanye na miriyoni 1.86 y amadollars yubu gusa ibi ntibyayibujije kuza kugurwa nyuma ubwo Ubwongereza na Amerika byinjiraga mu ntambara ya kabiri yose. Ahabanza zagiye zigira ibibazo byinshi kugeza zigeze aho ziba agatangaza niko kuyogoza burayi bwari bwarigaruriwe n abanazi no gusuka amatoni y ibisasu mu mbere mu Budage bwa Hitler ubundi arashoberwa karahava zisenya bidasubirwaho inganda n imijyi bye. Izi zarekeye gukorwa mu mwaka 1945 nyuma yuko bamaze gukora izigera mu 12 731 zikaba zarakorerwaga muri Boeing Plant 2 yabaga Seattle, Washington (BO) ndetse na California. Buri imwe yabaga yagurwa amafaranga angana na $ 238,329 (1945) ariyo miriyoni 2.7$ mu yo mu 2018.

Ngibi bimwe mu biranga B 17 mu bipimo byayo:

  • Crew (10): Pilot, co-pilot, navigator, bombardier/nose gunner, flight engineer/top turret gunner, radio operator, waist gunners (2), ball turret gunner, tail gunner
  • Uburebure: 66 m
  • Uburebure bw ibaba: 62 m
  • Uburebure: 82 m
  • Ubuso bw ibaba: 92 m2
  • Ibiro byayo idahetse: 16,391 kg
  • Ibiro byayo ihetse: 24,500 kg
  • Ibiro byinshi byanyuma yahagurukana: 29,700 kg
  • Imbaraga za moteri: 4 × Wright R-1820-97 “Cyclone” turbosupercharged radial engines, 1,200 hp (895 kW) kuri buri imwe
  • Ibipanga bya moteri: 3-bladed Hamilton-Standard constant-speed propeller

  • IMIKORERE
  • Maximum speed:462 km/h, 249 kn
  • Cruise speed: 293 km/h, 158 kn
  • Range: 3,219 km hamwe na 2,700 kg byaza bombload
  • Service ceiling: 10,850 m
  • Rate of climb:6 m/s
  • Wing loading:7 kg/m2
  • Power/mass: 150 W/kg

Armament

  • Imbunda:13 × .50 in (12.7 mm) M2 Browning machine guns
  • Bombs:
    • Short range missions (<400 mi): 3,600 kg
    • Long range missions (≈800 mi): 2,000 kg
    • Overload: 7,800 kg

 

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"Until the lions have their own historians, the history of the hunt will always glorify the hunter." ~African proverb A Universe and history lover

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