"The Delta-K was an American rocket stage, developed by McDonnell Douglas and Aerojet. It was first used on 27 August 1989 as the second stage for the Delta 4000 series. It continued to serve as the second stage for subsequent variants of the Delta rocket. It was propelled by a single AJ10-118K rocket engine, fueled by Aerozine 50 and dinitrogen tetroxide, which are hypergolic. The Delta-K had a long heritage to the first Able stage used in Project Vanguard. The AJ-10 engine was first used in the Able second stage of the Vanguard rocket, as the AJ10-118 configuration. It was initially fueled by nitric acid and UDMH. An AJ10 engine was first fired in flight during the third Vanguard launch, on 17 March 1958, which successfully placed the Vanguard 1 satellite into orbit. As of 25 May 2008, 138 have been launched, and excluding one which was destroyed by the explosion of a lower stage, none have failed. The Delta-K was used as the second stage of the Delta II rocket from 1989 to 2018. This second stage was retired at conclusion of the ICESat-2 launch on 15 September 2018."@en . . . "Delta-K"@en . . . . . . . . . . "3380"^^ . . "O Delta K \u00E9 um foguete espacial estadunidense usado como est\u00E1gio de v\u00E1rios outros foguetes Delta."@pt . . . . . . "The Delta-K was an American rocket stage, developed by McDonnell Douglas and Aerojet. It was first used on 27 August 1989 as the second stage for the Delta 4000 series. It continued to serve as the second stage for subsequent variants of the Delta rocket. It was propelled by a single AJ10-118K rocket engine, fueled by Aerozine 50 and dinitrogen tetroxide, which are hypergolic. As of 25 May 2008, 138 have been launched, and excluding one which was destroyed by the explosion of a lower stage, none have failed."@en . . . . "Delta-K"@pl . "1064564748"^^ . . . . . . . "Delta-K merupakan tahapan roket Amerika, yang dikembangkan oleh McDonnell Douglas dan Aerojet. Ini pertama kali digunakan pada 27 Agustus 1989 sebagai tahap kedua untuk seri Delta 4000. Delta-K masih digunakan, saat ini sebagai tahap kedua dari roket Delta II."@in . . . "Delta-K"@in . . . . "Delta K"@pt . "Spent Delta-K stage, photographed in orbit"@en . . . . . . "Delta-K merupakan tahapan roket Amerika, yang dikembangkan oleh McDonnell Douglas dan Aerojet. Ini pertama kali digunakan pada 27 Agustus 1989 sebagai tahap kedua untuk seri Delta 4000. Delta-K masih digunakan, saat ini sebagai tahap kedua dari roket Delta II."@in . "Delta-K \u2013 g\u00F3rny cz\u0142on rakiet Delta 3000, Delta 4000, Delta 5000 i Delta II. W przeciwie\u0144stwie do innych stopni serii Delta nap\u0119dzanych silnikiem AJ-10 r\u00F3\u017Cni\u0142 si\u0119 rodzajem paliwa. Zamiast mieszanki UDMH i HNO3 wykorzystywa\u0142 mieszanin\u0119 Aerozine 50 i N2O4."@pl . . . . . "United States"@en . . . . . . . "17602697"^^ . . . . . . . . "Delta-K \u2013 g\u00F3rny cz\u0142on rakiet Delta 3000, Delta 4000, Delta 5000 i Delta II. W przeciwie\u0144stwie do innych stopni serii Delta nap\u0119dzanych silnikiem AJ-10 r\u00F3\u017Cni\u0142 si\u0119 rodzajem paliwa. Zamiast mieszanki UDMH i HNO3 wykorzystywa\u0142 mieszanin\u0119 Aerozine 50 i N2O4."@pl . . "O Delta K \u00E9 um foguete espacial estadunidense usado como est\u00E1gio de v\u00E1rios outros foguetes Delta."@pt . . ""@en . . . .