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~ Atlantis Membatalkan Fuel Cell Bermasalah

Alpen Steel | Renewable Energy


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~ Atlantis Membatalkan Fuel Cell Bermasalah

Fuel Cell Bermasalah, Atlantis Urung Diluncurkan

 

CAPE CANAVERAL, RABU - Badan Antariksa AS (NASA) lagi-lagi menunda peluncuran Atlantis karena ditemukan masalah pada sistem pembangkit listrik. Satu di antara tiga sel bahan bakar (fuel cell) yang membangkitkan listrik bagi pesawat ulang alik tersebut tidak berfungsi.

Masalah tersebut ditemukan Rabu (6/9) dini hari beberapa saat sebelum para manajer NASA mengambil keputusan untuk memulai pengisian bahan bakar hidrogen dan oksigen cair superdingin. Ketika sel-sel bahan bakar dinyalakan, alat ukurnya menunjukkan tegangan rendah pada salah satu sel. Hingga batas waktu pengisian pukul 04.00, masalah tersebut tidak dapat diselesaikan sehingga peluncuran akhirnya ditunda.

"Kami akan mempelajari apakah masalahnya besar atau dapat segera diaktifkan kembali," kata juru bicara NASA Bruce Buckingham. Sedianya, Atlantis akan diluncurkan hari ini, Rabu (6/9) pukul 12.29 waktu setempat atau pukul 23.29 WIB, namun ditunda hingga Kamis (7/9) pukul 12.03 waktu setempat.

Atlantis hanya punya kesempatan menunda peluncuran sampai Jumat (8/9) atau akan ditunda hingga akhir Oktober. Sebab, jadwal peluncuran harus bergantian dengan wahana Soyuz milik Badan Antariksa Russia yang dijadwalkan meluncur pada tanggal 18 September mendatang.

Jika peluncurannya mundur, dapat dipastikan mempengaruhi misi peluncuran berikutnya. Padahal, untuk menyelesaikan konstruksi ISS yang baru diselesaikan setengah bagian, NASA merencanakan 16 misi yang berlangsung hingga tahun 2010 sebelum wahana ulang alik yang dipakai sekarang dipensiunkan.

Program peluncuran ulang alik NASA untuk membangun ISS sempat dihentikan sekitar tiga tahun sejak terjadinya kecelakaan Columbia pada tahun 2003. Misi Atlantis kali ini merupakan peluncuran pertama untuk meneruskan pembangunan ISS. Dua misi Discovery sebelumnya hanya melakukan pengetesan sistem keamanan dan memperbaiki beberapa kendala teknis di ISS.

Pada misi kali ini, wahana tersebut membawa sepasang sel-sel surya yang akan dipasang di ISS sebagai pembangkit listrik. Selama misi yang akan berlangsung 11 hari, beberapa astronot direncanakan melakukan tiga kali spacewalk.


Sumber: AP
Penulis: Wah

 

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