Anti-missile plane makes first test flight(CNN)

Anti-missile plane makes first test flight(CNN)

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FromTaiwan 　於　2002/07/20 13:18
Anti-missile plane makes first test flight(CNN)
WASHINGTON (CNN) -- The maiden flight of an aircraft that officials hope will one day be able to shoot down U.S.-bound missiles took place Thursday over western Kansas, the Air Force said Friday. The Airborne Laser is planned as one part of the overall Missile Defense Agencys program to create a shield of defense systems to protect the country from incoming tactical or ballistic missiles. The test flight, from McConnell Air Force Base in Wichita, Kansas, was the first in a series designed to see if the modified Boeing 747 can still perform properly with its distinctive structural changes. The two-hour flight did not involve the firing of a laser, which is not scheduled to be installed until later this year, Boeing officials said. The weapon, officially known as the Prototype Attack Laser, Model A-1, is designed to destroy missiles during their early launch stage by focusing a beam on the missiles pressurized fuel tank, causing it to explode. The oxygen-iodine laser fired from the nose of the aircraft will be capable of burning a hole the size of a basketball in a missiles skin at a distance of 200 miles, generating temperatures hotter than 10,000 100-watt light bulbs, officials say. The actual temperature of the laser is classified, said Kenneth Englade, a spokesman for the project. In 1996, Boeing won the $1.1 billion project, now worth $1.8 billion, and partnered up with other defense contractor giants TRW and Lockheed Martin to build separate parts of the system. While the flight tests on the aircraft have begun, the goal of shooting down a missile with a laser has not yet been tested. The flight test represents a major step forward toward our ultimate goal of shooting down a ballistic missile with a beam of ultra-powerful light by the end of 2004, said the Airborne Laser program director, Col. Ellen M. Pawlikowski. If the laser tests are successful, the program will be turned over to the Air Force as the first line of defense against a missile attack. ------------------------------------------------------------------- It looks like this could be a very cost-effective way for missile defense. Maybe Taiwan should do more research on this.

ewings 　於　2002/07/20 13:23
Re:Anti-missile plane makes first test flight(CNN)
貼新聞記得貼日期如果沒有要特殊討論，請貼在新聞區

小滬尾　於　2002/07/21 07:25
Re:Anti-missile plane makes first test flight(CNN)
這欄FromTaiwan兄主要是想討論NMD的ABL﹐因為以開始測試目前的能力是能在200英里外在飛彈的表面燒開一個棒球大小的洞孔他老兄認為這是很省錢的方式﹐他認為我國應該考慮一下很遺憾的﹐有關一些雷射的文章不知何時復原先說一下幾個基本觀念﹐雷射在大氣運用時最大的問題是在大氣內的衰減及折射﹐ 在長距離下﹐使得雷射不是能量不夠摧毀目標就是﹐因大氣喘流折射偏離方向從上面的新聞看來﹐得知能量應該足夠﹐不過對折射偏離的修正如何還不知道以前與9999兄討論過這種修正技術﹐中國應該是採用以恆星光度位置等資訊為參考資料進行修正﹐原則上認為是在沒有光害的晚上可能效果不錯除了修正技術外﹐目標的定位精度也非常重要﹐通常預警雷達可能有高達數公尺甚至數十公尺的誤差﹐即使是X波段雷達﹐也有數公尺的誤差﹐對採用破片殺傷的ATBM可能沒什麼大問題﹐但對殺傷範圍集中在公分等級的雷射可能是個大問題

FromTaiwan 　於　2002/07/21 09:20
Re:Anti-missile plane makes first test flight(CNN)
小滬尾, Thanks again, The reason I brought it to you guys attention is that if it succeeds, the cost is probably close to constant. That is, it is likely to be independent of the incoming missiles. For the conventional missile-to-missile defense, the cost will be linearly portitional to the number of missiles deployed on the other side.

小滬尾　於　2002/07/21 10:14
Re:Anti-missile plane makes first test flight(CNN)
FromTaiwan兄不客氣不過老兄還是最好用中文﹐才會有更多的朋友參與討論就目前的ABL而言﹐如上貼所言﹐修正與定位的技術將是成敗的關鍵而這方面的技術我國應該是不怎麼夠﹐老實說﹐只有以國際分工的方式來分杯羹而且這大概至少得等5年此外﹐這種機載雷射若是無法24小時全天候值勤﹐說實在﹐對台灣的ATBM能力幫助有限﹐當然﹐可以考慮陸基雷射方式﹐但前述的問題將比機載雷射更複雜﹐而且射程可能大複縮短目前﹐防禦TBM最便宜有效的方式還是﹐疏散﹐偽裝﹐欺敵

flak 　於　2002/07/21 12:46
Re:Anti-missile plane makes first test flight(CNN)
>不過對折射偏離的修正如何還不知道 ABL的適應控制反射鏡曾宣稱可以把射程延長一倍，應該就知道修正的能力有多強了。它修正的方法是先打一道雷射測量大氣狀況，再動態調整反射鏡曲面。另外美國NASA最近也開始大規模重新測量全球高空大氣狀況。另一個跟雷射有關的消息是LM已經開始研究在F-35上安裝固態雷射，預計使用引擎的動力驅動固態雷射，可達到100kW，每發六秒左右的雷射。但其實其射程可能不會很好看，對戰機的射程可能只有6公里，所以在空對空時可能只能拿來對付近距離目標或是自衛用，使用時腹部會伸出一個雷射頭，也可能在背部裝一個。所以主要的用途還是特別任務，在極小的空間內精確攻擊地面的軟性目標而不傷及無辜。 LM宣稱雷射的一個好處是：「被攻擊的人將不知道雷射是從哪裡射過來的」。乍聽之下很怪，市面上不是有一堆雷射警報器嗎？想一想就有道理，雷射警報器是偵測低功率的標定雷射，目前沒有人作出可以偵測高功率殺傷雷射的警報器。

FromTaiwan 　於　2002/07/21 12:48
Re:Anti-missile plane makes first test flight(CNN)
小滬尾兄, 抱歉,國外住了十幾年,注音符號幾乎忘光了,打起中文慢死了.

ewings 　於　2002/07/21 12:51
Re:Anti-missile plane makes first test flight(CNN)
突然想到 flak老大以前在椰林寫的那篇空中雷射的文章 discovery有介紹的VCD，叫超級雷射有興趣的人就去弄來看吧

Skywalker-Luke 　於　2002/07/21 12:54
Re:Anti-missile plane makes first test flight(CNN)
這架AL-1是以747-400F貨機改裝而成，機艙內裝置空載雷射系統，機首加裝與VC-25A/E-4B相同的飛椼式受油裝置。

小滬尾　於　2002/07/21 20:51
Re:Anti-missile plane makes first test flight(CNN)
謝謝flak兄 >它修正的方法是先打一道雷射測量大氣狀況請問是利用LADAR的原理嗎﹖

Skywalker-Luke 　於　2002/07/22 00:30
Re:Anti-missile plane makes first test flight(CNN)
波音747-400F性能諸元全長：231呎10吋（70.66公尺）翼展：213呎（64.92公尺）最大起飛重量：872,000磅最大落地重量：630,000磅最大空重（無燃油）：535,500磅發動機型式：普惠(Pratt & Whitney)PW4056 發動機推力：56,000磅適用貨櫃：LD-3(AKE), LD-6(ALF), M-1(AMA), LD-9(AA2), LD-11(AWS), LD-26(AAF) 最大重量下使用跑道起飛長度：11,100呎最大重量下使用跑道落地長度：7,500呎（海平面╱乾性跑道）油箱容量：57,164加崙╱382,998磅燃料消耗：3,230加崙╱小時最大飛行高度：45,100呎巡航飛行高度：31,000至41,000呎巡航速度：0.86馬赫(M) 飛行距離（0酬載）：5400至6500浬

flak 　於　2002/07/22 12:26
Re:Anti-missile plane makes first test flight(CNN)
>請問是利用LADAR的原理嗎 LADAR是偵測物體，跟偵測大氣應該沒什麼關係吧？！印象中 ABL飛機上應該有三具雷射一具與射控系統測距一具量大氣一具真正的武器雷射

小滬尾　於　2002/07/22 20:10
Re:Anti-missile plane makes first test flight(CNN)
>一具量大氣 flak兄這個部份是個人最好奇的地方可否指教一下其方式因為左想右想找不出其校正模式如同上面的文章﹐PRC或義大利是採取量測恆星的光度來參考而ABL上負責量測大氣者﹐小弟還是參不大透怎麼玩﹖ 難道是與那個測距系統搭配﹖

ewings 　於　2002/07/22 22:57
Re:Anti-missile plane makes first test flight(CNN)
目標擷取還是那台767嗎？

flak 　於　2002/07/23 13:19
Re:Anti-missile plane makes first test flight(CNN)
>而ABL上負責量測大氣者﹐小弟還是參不大透怎麼玩﹖ FAS上有一些文章講這個，不過Link好像都掛了....：P 基本上就是打一道雷射出去，觀察散射的情形，就可以修正了

BWS 　於　2002/07/23 13:24
Re:Anti-missile plane makes first test flight(CNN)
是這邊嗎?? http://fas.org/spp/starwars/program/abl.htm http://fas.org/spp/starwars/program/docs/97-0581.htm http://fas.org/spp/starwars/program/abl/index.html

小滬尾　於　2002/07/23 20:13
Re:Anti-missile plane makes first test flight(CNN)
flak兄﹐BWS兄﹐謝謝

小滬尾　於　2002/07/24 10:04
Re:Anti-missile plane makes first test flight(CNN)
不好意思老人痴獃症發作﹐而且所持某股研發治療老人痴獃症的生化公司日前宣告研發失敗嗚~~~~~ 上次說的LADAR應該是更正為LIDAR 其利用雷射量測大氣現象的原理可參考 http://oea.larc.nasa.gov/PAIS/LaserSensing.html

Skywalker-Luke 　於　2002/07/25 23:35
Re:Anti-missile plane makes first test flight(CNN)
>目標擷取還是那台767嗎？ http://www.airliners.net/photos/small/9/2/9/163929.jpg 是這架註冊編號N767BA的B767-200嗎？

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