主题：印度要请波音帮助把LCA收尾？ -- 晨枫
家园 印度要请波音帮助把LCA收尾？ 3月19日，印度空军声称将由波音接手LCA的后期研发，保证LCA在2010年入役。波音还没有确认得到这个合同。
如果这个消息属实的话，这问题就大了。LCA已经试飞7年了，正常情况下，现在应该是印度丰收的时候，现在还要波音帮忙，那只有几个可能：
1、飞机设计有问题，问题可大可小，大可以是哪个奇怪的双三角翼，或者发动机-飞机整合问题，或者是线控问题；小可以是局部颤振或者像FC-1那样起飞抬头不足的问题；不知道具体是什么问题。
2、试飞问题，这是飞机没有本质性的问题，但印度没有能力飞出整个包线，无法确立可用的性能指标，需要波音帮忙。或者是印度没有能力试飞从飞控到火控的所有科目，或者时间不够了，不知道怎么有效组织试飞。
3、生产问题，这是飞机和试飞都没有问题，但印度没有能力有效组织生产、质量控制、交货和售后服务。考虑到印度自行研制INSAS步枪后，竟然忘记配套的5.56毫米子弹生产线，这个可能性可是老大不小。
LCA的新技术真是从头到脚，这不光是先进，而且是对印度全新的。气动设计、复合材料、发动机、航电、火控雷达、线控，都是从零开始。印度还胃口大，样样都要世界前列的技术，这个技术风险实在太大了。可巧印度对于技术风险的控制毫无经验，先前的track record也是很糟，LCA到现在再出点花样一点也不奇怪。
本帖一共被 1 帖 引用 (帖内工具实现)家园 LCA去年航展的飞行表演，大家能否点评一下？ [FLASH]http://www.youtube.com/v/ywNwdqXNGvs[/FLASH]
家园 不敢点评，说点感想吧 动作比较保守，不知道是飞机性能的限制，还是飞行员不敢放开来飞。就飞出来的性能来看，和歼10的差距不是一点点。还有一个奇怪的是：视频很少把一个动作录全，常常动作做了一半或者大半就剪辑跳到下一个动作去了，而下一个动作又不是什么了不起的机动。不理解，应该是摄像和编辑的人的水平太差，而不至于是飞机的后半个机动出了什么怪。
LCA要是就这个水平，印度空军还不如接着买米格-29。
家园 印度空军拒绝采购，ＬＣＡ步阿琼坦克的后尘 最可笑的是最后两段，一如既往，眼看拉不开栓了，赶紧给ＬＣＡ定了个新的交付日期。ＬＣＡ的故事就沿着这条循环的轨道继续走下去。
原文发表于１２月５日，出处在这里。晨枫老大有空的话请给分析分析？这里头乐子大了。
出版物：报纸－－The Hindu
Online edition of India's National Newspaper
Friday, Dec 05, 2008
ePaper | Mobile/PDA Version
主标题：印度空军坚持ＬＣＡ要改进 IAF insists on changes to Tejas
作者：Ravi Sharma
副标题：ＬＣＡ没有达到空军的最低要求It does not meet minimum air staff requirements
副标题：ＬＣＡ的Ｍｋ２改型发展后，印度空军将考虑I采购１２５架。AF will consider acquiring 125 more Tejas’ when Mk2 variant is developed
副标题：ＬＣＡMk2因为引擎问题还要等几年。 Mk2 will take a few years because a new powerful engine has to be chosen
正文：
BANGALORE: The Indian Air Force has categorically ruled out placing further orders for the indigenous Light Combat Aircraft (LCA), Tejas, with its current configuration.印度空军斩钉截铁地排除了进一步采购现行结构的ＬＣＡ。
In 2005, the IAF placed an order with Hindustan Aeronautics Limited for 16 fighters and four trainers. The then Defence Minister Pranab Mukherjee said a decision on an additional 20 aircraft was under consideration. But that plan has come a cropper since the overweight, under-powered Tejas does not meet the IAF’s minimum air staff requirements (ASR).
The IAF decision though is not the end of the road for the Rs. 6,000-crore LCA programme. It will consider acquiring 125 more Tejas when an improved — Mark 2 (Mk2) — variant is developed. As indicated by an IAF committee in 2004, any further order will be subject to the Aeronautical Development Agency (ADA), the designer and developer of the LCA programme, showing “firm visibility that the aircraft will meet the ASR.”
Recently, the IAF even made a few suggestions on improvements in Tejas Mk2, including a more powerful engine, optimisation of the aerodynamic qualities and weight of the aircraft and “dropping and replacing” certain parts to take care of obsolescence.
Tejas Mk2 will take a few years to fructify, the biggest challenge being choosing a new powerful engine. In December, the ADA is expected to issue a request for proposal to General Electric for its GE F414 and to the European consortium Eurojet for EJ200, in a bid to procure 99 engines (with an option to buy another 49).
Once the engine is chosen, fuselage modifications will have to be carried out, flight tests started and evaluation undertaken. All trainer aircraft even after Tejas Mk2 rolls out will continue to have the present GE F404 engines.
Cold weather trials
On the LCA programme, the ADA is getting ready for ‘cold weather trials.’ They were to have been conducted in 2007 but were not because of questions about the aircraft’s reliability.
Two or three aircraft are scheduled to leave for Leh on December 8. Cold weather trials include landing the Tejas at Leh, one of the most challenging airfields in the world, and ‘cold soak’ when temperatures are around minus 15 degrees C to see if the systems on board function normally.
Slow pace
The IAF is also worried about the slow pace and quality of work at HAL. More so, because it will not be able to deliver by 2013, as scheduled, the 20 aircraft for which orders have been placed. Defence Minister A.K. Antony recently said the Tejas would enter squadron service by 2011, which date, according to officials, is highly optimistic as hardly 10 or 12 test sorties are now being undertaken. The IAF expects the final operational clearance for the Tejas only after 2012.
家园 还真是这样啊！ 我在写起而不飞的时候，差点把这个事写进去了。想想不大厚道，别乌鸦嘴，结果还真就是这么回事。这老印啊，真叫人看笑话都不好意思。
他这“世界上最严酷的低温机场”Leh的温度才零下15度，那加拿大空军岂不全该冻在地面上了？零下15度，要是有太阳，那是拖出躺椅sun tan的日子啊。呃，这个说得夸张了一点，不过零下15度怎么也算不上低温试验的，当然，除了在印度。
换用F414或者EJ200，看来还是要基本保留原机体，只是放大到足够装型发动机，用增加的推力来补偿原来的超重，否则推重比还是不够。这样一来，机内载油量还是上不去，而加大的发动机的绝对耗油增加，航程更加小了。这Mk2还是够呛。
- 复 还真是这样啊！
家园 ＬＣＡ起而不飞，全赖西西河。 这条河里有一位大仙，叫做“一直在改”。他的毛病就是三天两头改版面，把小河虾们支得是一会儿朝东，一会儿往西，一会向上，一会冲下。
没想到后来居然把此病传染给了ＬＣＡ的总师，把他也调教成了个“一直在改”。改来改去闹了二十多年，连ＩＯＣ证书都拿不到。
眼下２００８说话就过完，ＬＣＡ想在２００９装备印度空军算是彻底瞎了。说什么也得找一辙把这完不成的任务给忽悠过去，于是，这ＬＣＡ接着改，而且是大改－－改换门庭上西方发动机喽。
二十一世纪初的军事历史学家指点了ＨＡＬ一下，说听好喽，拿来个Ｆ４１４直接安上，容易嘛？老大造的那些个好玩艺儿对ＬＣＡ绝不会可丁可卯，机身和进气道全都得给我推倒重来，油箱得造个大号的，这些个事情少打马虎眼，跟我这儿玩立个儿隆。您以为这是拜大街上的神牛呐？
- 复 还真是这样啊！
家园 看来他们准备把LAC重做了, 这样做出来,换一新发动机,连带的机体设计.燃油问题.那是多大的工程?
其实换差不多的发动机.象歼八把wp14换昆仑那种换法才有意义.气流量不增加.基本尺寸差不多.那才有用.印度这样来,那就肯定就是重新来一个.要是还这样搞,三十年后还是盼望LAC飞起来!
- 复 还真是这样啊！
家园 EJ200与F404的尺寸好像基本上差不多 EJ200长4m，直径737mm，而F404-GE-402长3,912 mm，直径889 mm，用EJ200替换F404应该不算太难，主要是管线的配合问题。
而F414的外形尺寸与F404一样（我也比较奇怪，实在Wiki中查的）
