X51A 第三次失败

星期二从加州沿岸由一架B52发射，计划飞行300秒，最高达到马赫数 6， 但是飞了16秒，无法继续控制。。


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Air Force's hypersonic test fails

By Mike Mount

A hypersonic aircraft launched by the Air Force Tuesday spiraled out of control and was destroyed before it could reach its goal of speeding to 4,600 mph, Pentagon officials said Wednesday.

The third test of the X-51A Waverider was launched Tuesday off the California coast from a B-52 modified bomber aircraft and was to fly for 300 seconds, reaching hypersonic speeds of Mach 6, but only flew for 16 seconds, according to the Air Force.

Officials said a problem with a tail fin caused the missile-like vehicle to fly out of control before the main engine could be ignited, leading researchers to destroy it early.
--在主发动机点燃前尾舵/鳍发生问题导致“导弹”失去控制，然后下令提前摧毁。
"A fault was identified with one of the cruiser control fins. Once the X-51 separated from the rocket booster, approximately 15 seconds later, the cruiser was not able to maintain control due to the faulty control fin and was lost," said a statement issued by the Air Force.

It's unclear what, if any, information was gleaned from the test. According to the statement, "Program officials will now begin the process of working through a rigorous evaluation to determine the exact cause of all factors at play."

The Air Force plans to go public with details of the failed test in a few weeks, after researchers are able to analyze the data from the flight.
(omitted below)
from CNN news

CNN顺便提了以前最持久的是120秒多，然后说风洞无法模拟。。

from:  security.blogs.cnn.com/2012/08/15/air-force-hypersonic-test-fails/

星期二从加州沿岸由一架B52发射，计划飞行300秒，最高达到马赫数 6， 但是飞了16秒，无法继续控制。。


Permalink
Air Force's hypersonic test fails

By Mike Mount

A hypersonic aircraft launched by the Air Force Tuesday spiraled out of control and was destroyed before it could reach its goal of speeding to 4,600 mph, Pentagon officials said Wednesday.

The third test of the X-51A Waverider was launched Tuesday off the California coast from a B-52 modified bomber aircraft and was to fly for 300 seconds, reaching hypersonic speeds of Mach 6, but only flew for 16 seconds, according to the Air Force.

Officials said a problem with a tail fin caused the missile-like vehicle to fly out of control before the main engine could be ignited, leading researchers to destroy it early.
--在主发动机点燃前尾舵/鳍发生问题导致“导弹”失去控制，然后下令提前摧毁。
"A fault was identified with one of the cruiser control fins. Once the X-51 separated from the rocket booster, approximately 15 seconds later, the cruiser was not able to maintain control due to the faulty control fin and was lost," said a statement issued by the Air Force.

It's unclear what, if any, information was gleaned from the test. According to the statement, "Program officials will now begin the process of working through a rigorous evaluation to determine the exact cause of all factors at play."

The Air Force plans to go public with details of the failed test in a few weeks, after researchers are able to analyze the data from the flight.
(omitted below)
from CNN news

CNN顺便提了以前最持久的是120秒多，然后说风洞无法模拟。。

from:  security.blogs.cnn.com/2012/08/15/air-force-hypersonic-test-fails/