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[美国发射] 2018年2月7日04:45,Tesla公司首辆量产车由Falcon Heavy自KSC发射,进入太阳轨道

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dadao 发表于 2017-7-11 10:44 | 显示全部楼层
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cjdam2003 发表于 2017-7-11 11:43 来自航空航天港手机版! | 显示全部楼层
爆破鬼才太空X 发表于 2017-7-11 08:24
重型猎鹰的首飞几乎不可能成功,助推器分离是五大国企流氓的专属技术,要掌握流体分离十分困难,难以模拟, ...

哈哈,印度都毫无问题的技术,也来说。为了黑已经走火入魔
iamanewbee 发表于 2017-7-11 12:35 | 显示全部楼层
27个发动机,谨慎悲观不看好首飞。
1717jy 发表于 2017-7-11 13:28 | 显示全部楼层
就看发射台静态点火测试的结果乐不乐观了。如果控制住了共振问题,那发射的成功率就高了
ceres 发表于 2017-7-11 21:18 | 显示全部楼层
dadao 发表于 2017-7-11 10:23
N1火箭发动机安排

注意到细节
一级貌似是六个滚控喷管

--
话说这滚控发动机型号是什么?
--
N1的控制要是是中间六台双摆就好了


ddgs_wlz 发表于 2017-7-11 23:07 来自航空航天港手机版! | 显示全部楼层
ceres 发表于 2017-7-11 21:18
注意到细节
一级貌似是六个滚控喷管


相比较而言,重型猎鹰是27个发动机双向全动,所以要好控制的多
ddgs_wlz 发表于 2017-7-11 23:17 来自航空航天港手机版! | 显示全部楼层
cjdam2003 发表于 2017-7-11 11:43
哈哈,印度都毫无问题的技术,也来说。为了黑已经走火入魔

spacex能精妙的让火箭停在摇摆的船上,分离个助推器能难?恐怕是其他人都掌握不了助推器回收吧
ddgs_wlz 发表于 2017-7-11 23:25 来自航空航天港手机版! | 显示全部楼层
1717jy 发表于 2017-7-11 13:28
就看发射台静态点火测试的结果乐不乐观了。如果控制住了共振问题,那发射的成功率就高了

这火箭只要起飞时没有问题,后面芯级一节流问题就不大了。
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dadao 发表于 2017-7-12 01:03 | 显示全部楼层
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ddgs_wlz 发表于 2017-7-12 14:53 来自航空航天港手机版! | 显示全部楼层
dadao 发表于 2017-7-12 01:03
助推器同主芯级都是一路货吧?

难度只在于同时回收3个1级。

都是差不多的一级,只是助推器在边上先分离而已,两个助推器回基地,芯级去船上
hkhtg090201 发表于 2017-7-20 08:23 | 显示全部楼层
为了发射台考虑,  FH会不会临阵取消呢?

Falcon Heavy demo flight stands a good chance of failure. Elon would be happy if SpaceX gets away with an undamaged pad LC-39A. "Real good chance that vehicle does not make it to orbit", and "major pucker factor".

A: A lot can go wrong on FH demo ignition, "guaranteed to be exciting." Hard to test on the ground: dynamics, airflow, buffering, MaxQ. "Real good chance that vehicle does not make it to orbit...I would consider no pad damage a win. So yeah...major pucker factor."
dwy 发表于 2017-7-20 08:27 来自航空航天港手机版! | 显示全部楼层
hkhtg090201 发表于 2017-7-20 08:23
为了发射台考虑,  FH会不会临阵取消呢?

guaranteed to be exciting."

取消了还整改pad干嘛?
hkhtg090201 发表于 2017-7-20 08:52 | 显示全部楼层
重型猎鹰准备首次亮相飞行,同时Musk希望谨慎
Falcon Heavy prepares for debut flight as Musk urges caution on expectations
July 19, 2017 by Chris Gebhardt
https://www.nasaspaceflight.com/ ... ution-expectations/

  凑合着看吧,大致意思能懂:
目前NASASpaceflight.com了解到,Falcon Heavy的发动机启动顺序将会交错 - 就像主机起动在Shuttle上交错一样。

对于航天飞机,三个主要发动机中的每一个在前一个120毫秒之后启动;然而,对于任何人实时查看发动机起动序列,发动机同时亮起。

现在可以理解,Falcon Heavy公司将采用类似的过程,两台发动机同时亮起,接下来是两个发动机,等等,直到所有的27起运行。


...  ....

虽然不是Falcon Heavy航班的要求,但现在似乎RSS(旋转服务结构)将在Falcon Heavy首次亮相时从LC-39A完全消失。

Pad-A的工作人员已经严格利用了本月的Range-sized停机时间,在RSS的拆除方面取得了重大进展,这被称为快速下降。




PS: musk 承认当初很幼稚.
黑与白 发表于 2017-7-20 08:54 | 显示全部楼层
hkhtg090201 发表于 2017-7-20 08:52
重型猎鹰准备首次亮相飞行,同时Musk希望谨慎
Falcon Heavy prepares for debut flight as Musk urges cau ...

马斯克还能低头?我真是大开眼界了,不过现在能有这种态度也是值得欣慰的,可以确定的是FH的联合震动会相当恐怖
hkhtg090201 发表于 2017-7-20 08:58 | 显示全部楼层
dwy 发表于 2017-7-20 08:27
guaranteed to be exciting."

取消了还整改pad干嘛?

不炸发射台就是胜利, 这种话Musk都说出来了,可见FH的危险性,

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jisuluntan 发表于 2017-7-20 11:51 | 显示全部楼层
这么说只是降低大家的期望值而已。27台静态点火都要进行很多次,所以实际首飞的时候应该不会炸发射台。升空后的火箭特性没法实验也模拟不出来,所以是风险最高的阶段。能坚持过最大动压,收集足够数据,就是高空炸了,也好改进了。
 楼主| cmj9808 发表于 2017-7-20 12:26 | 显示全部楼层
老马就是downplay expectation而已,不要过度解读。

这里很多网友可能觉得马斯克是个大嘴巴,但是IBM的Watson可是把老马评为硅谷最谨慎的CEO,这不是没有原因的。



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黑与白 发表于 2017-7-20 12:27 | 显示全部楼层
jisuluntan 发表于 2017-7-20 11:51
这么说只是降低大家的期望值而已。27台静态点火都要进行很多次,所以实际首飞的时候应该不会炸发射台。升空 ...

怕的是静态点火的时候就把39A炸了
dwy 发表于 2017-7-20 12:31 来自航空航天港手机版! | 显示全部楼层
jisuluntan 发表于 2017-7-20 11:51
这么说只是降低大家的期望值而已。27台静态点火都要进行很多次,所以实际首飞的时候应该不会炸发射台。升空 ...

话说模型吹风洞是不是能模拟得到一些比如风压,气动载荷分布,空气湍流等数据做参考?想必spx都用计算机模拟这些来得到数据作为参考了。
wsl20005 发表于 2017-7-21 09:05 来自航空航天港手机版! | 显示全部楼层
Elon Musk is tamping down expectations about the maiden launch of SpaceX's huge new Falcon Heavy rocket.

There's a "real good chance" the vehicle won't make it to orbit during the liftoff, Musk said Wednesday (July 19) at the 2017 International Space Station Research and Development (ISSR&D) conference in Washington, D.C. That launch is expected to take place later this year from Florida's Space Coast.

"I hope it makes it far enough away from the pad that it does not cause pad damage. I would consider even that a win, to be honest," Musk told NASA ISS program manager Kirk Shireman, who interviewed the SpaceX CEO onstage at the meeting. "Major pucker factor, really; that's, like, the only way to describe it." [SpaceX's Falcon Heavy Rocket in Images]

The two-stage Falcon Heavy is based on SpaceX's Falcon 9 rocket, which has been ferrying payloads to space since 2010. The Heavy's first stage consists of two Falcon 9 first stages strapped to a central "core," which is itself a modified Falcon 9 booster.

Like the Falcon 9, the Heavy is designed to be reusable.

When the 230-foot-tall (70 meters) Falcon Heavy is up and running, it will be capable of lofting up to 60 tons (54 metric tons) to low-Earth orbit and 24 tons (22 metric tons) to geostationary transfer orbit, making it the most powerful rocket since NASA's famous Apollo-era Saturn V launcher, SpaceX representatives have said.

SpaceX has been developing the Falcon Heavy for years. The work has proven to be "way, way more difficult" than SpaceX originally expected, Musk said.

"At first, it sounds really easy: Just stick two first stages on as strap-on boosters. How hard can that be?" he said. "But then everything changes. All the loads change, aerodynamics totally change, you've tripled the vibration and acoustics."

The loads imparted on the center core during Falcon Heavy launches will be "crazy," Musk said, "so we had to redesign the whole center-core airframe. It's not like the Falcon 9, because it's got to take so much load."

In addition, it's impossible to fully test many aspects of the vehicle on the ground, he said.

So, while Musk stressed that he thinks the Falcon Heavy will prove to be "a great vehicle," the initial liftoff could be rocky.

"I encourage people to come down to the cape to see the first Falcon Heavy mission," he said, referring to Florida's Cape Canaveral. "It's guaranteed to be exciting."

SpaceX has not yet announced an official date for the launch. Musk recently suggested on Twitter, however, that the liftoff may happen in September or October.
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