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[其他发射] 2017年5月25日12:20,Electron小型运载火箭自新西兰玛希亚升空,未能入轨

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QGP! 发表于 2017-5-26 21:41 | 显示全部楼层
cmj9808 发表于 2017-5-25 22:34
这个公司之前连亚轨道都没打过,上来就是复合材料储箱加电动泵,第一次做成这样已经有点开挂了。

还要看参与的人员有没有相关经验,仅凭公司以前没有经验说明不了什么。今天人员是流动的,如果人员以前就相关经验,真正考验的不过是团队整合能力
 楼主| Flying_Pencil 发表于 2017-5-26 22:16 | 显示全部楼层
LOS ANGELES—Rocket Lab says that despite not reaching its intended orbit of between 300 and 500 km on its first test launch on May 25, the Electron vehicle performed nominally throughout most of the mission and successfully executed the majority of the test goals.
The company, which is developing the Electron for high-frequency launches tailored at cutting the cost of access to space for the small satellite market, is reviewing data from the flight which Rocket Lab CEO and founder Peter Beck estimates to have reached an apogee of around “250 km or more.”  The first test came after three days of delays caused by a combination of strong winds and high clouds at the company’s Mahia Peninsula Launch Complex 1 in New Zealand.

The two-stage Electron lifted off at 4:20 p.m. local time, marking the first launch of an orbital-class vehicle from a private launch site. Powered by the Rutherford engines developed in-house by Rocket Lab, the carbon-composite, liquid-oxygen/kerosene-fueled vehicle successfully completed the first stage burn and ascent through Max Q, the phase of maximum dynamic pressure that acts on a vehicle as it accelerates through the lower atmosphere. Stage separation was also nominal as was second-stage ignition and burn, Beck says.

“We saw a lot of firsts for sure, and we will optimize where we have to to make sure we get it right. I’m sure it will be very clear very quickly,” says Beck, referring to lessons the company expects to learn from the ongoing post-mission data analysis. Given the nominal staging and first-stage ascent, it is likely the focus will be on performance of the second stage. “We’d have liked to get to orbit on the first shot, but that’s reserved for a rare group in history, and that’s usually a country, not a company. So we are very happy with the vehicle’s performance,” he adds.

Although the first test did not achieve orbit, Rocket Lab still expects to be able to clear the vehicle for the start of commercial operations by year’s end with two more test shots. “We are well ahead of where we need to be,” says Beck, who said the company’s ground operations, launch site and tracking station, based on Chatham Island, all performed to plan.

In the meantime, Rocket Lab continues to prepare for the Moon Express mission, one of the contenders for the Google Lunar X Prize competition. The California-based company is buying three Electron launches to send versions of its MX-1 lunar lander. “The first vehicle is being manufactured as we speak,” Beck says. The mission is designed to launch slightly under 10 kg to the lunar surface. “It’s a more unusual mission for us,” he adds.

As the goal is to reach transfer orbit, “it is an easier mission for us. It’s an easier trajectory for us than Sun-synchronous, so it is very simple with no additional burn needed to circularize the orbit.” The mission will, however, “stretch the legs” of the Electron, adds Beck. The first of the Moon Express launches is also scheduled by year’s end.
http://aviationweek.com/space/rocket-lab-well-ahead-after-initial-launch-test
cmj9808 发表于 2017-5-26 23:42 | 显示全部楼层
QGP! 发表于 2017-5-26 21:41
还要看参与的人员有没有相关经验,仅凭公司以前没有经验说明不了什么。今天人员是流动的,如果人员以前就 ...

团队是最关键的,SpX初创时也不乏来自知名火箭公司的核心人物,Falcon 1也没采用什么高难技术,但前三次发射仍然以失败告终。而electron是世界上首个采用复合材料储箱和电动泵的火箭,首次发射就成功完成了几乎所有关键节点,这是相当难得的成绩。
QGP! 发表于 2017-5-27 22:01 | 显示全部楼层
cmj9808 发表于 2017-5-26 23:42
团队是最关键的,SpX初创时也不乏来自知名火箭公司的核心人物,Falcon 1也没采用什么高难技术,但前三次 ...

团队的领导力同样是这些人经历的一部分,技术人员可以挖,有丰富经验的领导核心也一样,把这些融合在一起就是团队整合,所以说到底还是团队整合问题

如果完全是成熟技术的应用,那完全没什么可称道的了。最后没有完全入轨也说明了技术(不管是软还是硬)整合没有完全成功
 楼主| Flying_Pencil 发表于 2017-5-30 21:47 | 显示全部楼层
走的方向不对。。。
UPDATE: 5.15pm: Rocket Labs has just released the following statement, confirming the source who told NBR the Electron rocket had a successful launch, but did not reach orbit (the insider added the rocket had to be "terminated" after veering too far off course):

Copyright NBR. Cannot be reproduced without permission.
Read more: https://www.nbr.co.nz/article/rocket-lab-counts-down-first-test-launch-ck-202970
Follow us: @TheNBR on Twitter | NBROnline on Facebook
喵科动物 发表于 2017-6-20 16:15 来自航空航天港手机版! | 显示全部楼层
QGP! 发表于 2017-5-27 22:01
团队的领导力同样是这些人经历的一部分,技术人员可以挖,有丰富经验的领导核心也一样,把这些融合在一起 ...

SPX当年已经是TRW的前总师加上Delta II的前总师了。
cmj9808 发表于 2017-8-7 15:19 | 显示全部楼层
rocketlab的故障报告出来了。地面遥测系统丢失信号,安全人员被迫启动自毁装置中止飞行。故障发生时火箭一切正常。
Rocket Lab’s investigation team determined the launch, named ‘It’s a Test’, was terminated due to a data loss time out, which was caused by misconfiguration of telemetry equipment owned and operated by a third-party contractor who was supporting the launch from Rocket Lab’s Launch Complex 1.

Four minutes into the flight, at an altitude of 224 km, the equipment lost contact with the rocket temporarily and, according to standard operating procedures, range safety officials terminated the flight. Data, including that from Rocket Lab’s own telemetry equipment, confirmed the rocket was following a nominal trajectory and the vehicle was performing as planned at the time of termination.

https://www.rocketlabusa.com/lat ... st-flight-analysis/
爆破鬼才太空X 发表于 2017-8-7 15:32 来自航空航天港手机版! | 显示全部楼层
这调查报告扯淡了,把锅全甩到别的承包商上,看来下次还得继续败
cmj9808 发表于 2017-8-7 15:37 | 显示全部楼层
有人问到滚转异常的问题,rocketlab表示滚转率在限制之内,下次任务会进一步调高阈值以限制滚转。
anthony‏ @morfca  47m47 minutes ago

what about the roll?

Rocket Lab‏

Replying to @morfca

The roll was within limits - we're updating parameters and tightening our bounds ahead of flight two.
https://twitter.com/RocketLab/status/894451092884410368
joki 发表于 2017-8-7 16:55 | 显示全部楼层
喵科动物 发表于 2017-6-20 16:15
SPX当年已经是TRW的前总师加上Delta II的前总师了。

Delta2芯一级干质比设计接近18,F9高干质比设计恐怕跟这位老兄有一定关系,一直不知道他的全名是什么。。。
ddgs_wlz 发表于 2017-8-7 17:54 来自航空航天港手机版! | 显示全部楼层
Flying_Pencil 发表于 2017-5-30 21:47
走的方向不对。。。

你为什么觉得是方向不对?
cmj9808 发表于 2017-8-8 11:00 | 显示全部楼层
joki 发表于 2017-8-7 16:55
Delta2芯一级干质比设计接近18,F9高干质比设计恐怕跟这位老兄有一定关系,一直不知道他的全名是什么。。 ...

Chris Thompson
Mr. Thompson is responsible for the development of vehicle structures, new manufacturing techniques and operations, with a focus on optimizing the product transition from design to production.  In this role, he has produced many of our key launch system innovations.  He started his career in the Marine Corps before joining McDonnell Douglas (now Boeing), where he successfully managed production of the Delta II, III, and IV, and Titan IV launch vehicles. Mr. Thompson has over 20 years cumulative experience in production and test operations on launch vehicles, spacecraft and aircraft.
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喵科动物 发表于 2017-8-23 00:09 | 显示全部楼层
joki 发表于 2017-8-7 16:55
Delta2芯一级干质比设计接近18,F9高干质比设计恐怕跟这位老兄有一定关系,一直不知道他的全名是什么。。 ...

CZ2芯一级干质比也到15了,怎么CZ7差距这么大。
joki 发表于 2017-8-23 07:27 | 显示全部楼层
喵科动物 发表于 2017-8-23 00:09
CZ2芯一级干质比也到15了,怎么CZ7差距这么大。

YF20本身比较轻,推重比约100。且CZ2是自生增压设计,常温推进剂也不需要保温层,总体而言比较轻。
CZ7所用YF100推重比约60,氦增压气瓶组,氧箱防热层,干质比下降是必然的。
cmj9808 发表于 2017-8-23 19:50 | 显示全部楼层
喵科动物 发表于 2017-8-23 00:09
CZ2芯一级干质比也到15了,怎么CZ7差距这么大。

推进剂密度也不一样,Titan IV的二级干质比超过20,而Atlas V CCB的干质比只有15
喵科动物 发表于 2017-8-26 02:14 | 显示全部楼层
cmj9808 发表于 2017-8-23 19:50
推进剂密度也不一样,Titan IV的二级干质比超过20,而Atlas V CCB的干质比只有15

同种推进剂,CZ2跟Delta2比,CZ7跟F9比
喵科动物 发表于 2017-8-26 02:28 来自航空航天港手机版! | 显示全部楼层
joki 发表于 2017-8-23 07:27
YF20本身比较轻,推重比约100。且CZ2是自生增压设计,常温推进剂也不需要保温层,总体而言比较轻。
CZ7 ...

为啥CZ7和F9都要在有自生增压技术基础,而且有迫切减重需求的情况下用回氦气增压?对比CZ6和土星1B这些性能较低的型号反倒用了自生增压。
纸飞机 发表于 2017-8-26 14:01 | 显示全部楼层
喵科动物 发表于 2017-8-26 02:28
为啥CZ7和F9都要在有自生增压技术基础,而且有迫切减重需求的情况下用回氦气增压?对比CZ6和土星1B这些性 ...

液氧可以自生,但煤油必须氦气
cmj9808 发表于 2017-8-26 15:17 | 显示全部楼层
喵科动物 发表于 2017-8-26 02:14
同种推进剂,CZ2跟Delta2比,CZ7跟F9比

CZ-2和Delta II是不同推进剂
喵科动物 发表于 2017-8-31 17:33 | 显示全部楼层
cmj9808 发表于 2017-8-26 15:17
CZ-2和Delta II是不同推进剂

好吧……跟大力神搞混了
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