B-2 stealth bombers development work began in 1978, 1989, the most established product procurement plan includes one combat aircraft and 132 helicopters (including five from the newly converted). Total cost amounted to 60 billion US dollars (1989 values), 450 million per aircraft .
B-2 stealth bombers development work began in 1978, 1989, the most established product procurement plan includes one combat aircraft and 132 helicopters (including five from the newly converted). Total cost amounted to 60 billion US dollars (1989 values), 450 million per aircraft.参考资料：http://www.netat.net/MyJsp.jsp 已赞过已踩过<
The process researching of B-2 stealth bomber is started at year 1978. At the year 1989 the comfirming of buying plan is including 1 original bomber and 132 fighters (5 of them have been upgraped). The total payment is about 600 billions(at that time), with 4.5 billion each.
