Merlin-1

Автор Salo, 24.04.2011 12:14:31

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Lamort

ЦитироватьВсё-таки ума не приложу, как на Мерлине-1D при давлении 105 атм удалось получить сравнимый УИ с двигателем с давлением в КС 160 атм.
У РД-163 наверно просто степень расширения больше. Увеличение сопла для повышения вакуумного удельного импульса должно уменьшать наземный удельный импульс сильнее, чем увеличивается вакуумный.
La mort toujours avec toi.

Salo

У РД-107А около 19 при 60 атм. УИ 263 с и 320 с.
"Были когда-то и мы рысаками!!!"

Glaurung

ЦитироватьВ таком случае у РД0163 должна быть меньше 16.
Это не так.

Salo

А сколько?
"Были когда-то и мы рысаками!!!"

Glaurung

ЦитироватьА сколько?
Больше 25.

Salo

У НК-33 около 27.
"Были когда-то и мы рысаками!!!"

Lamort

Интересно, внутренняя часть сопла тоже создаёт довольно значительную тягу, могут двигатели как-то отличаться внутренней частью сопла?
La mort toujours avec toi.

Salo

http://www.aviationweek.com/Article.aspx?id=/article-xml/AW_08_20_2012_p31-486488.xml

To produce the motors, CRP uses a computer-aided design (CAD) file containing the motor's shape, and electronically divides it into layers for the 3-D printing. Space Exploration Technologies Corp. (SpaceX) uses the same technique to manufacture tiny impellers and other parts for its Merlin rocket engines from titanium powder, according to a SpaceX spokesman.
"Были когда-то и мы рысаками!!!"

Boris R

Цитироватьhttp://www.aviationweek.com/Article.aspx?id=/article-xml/AW_08_20_2012_p31-486488.xml
ЦитироватьTo produce the motors, CRP uses a computer-aided design (CAD) file containing the motor's shape, and electronically divides it into layers for the 3-D printing. Space Exploration Technologies Corp. (SpaceX) uses the same technique to manufacture tiny impellers and other parts for its Merlin rocket engines from titanium powder, according to a SpaceX spokesman.[/size]
Молодцы! Но как они это делают, что титановая пыль становится монолитным изделием? Спекают что ли?

Salo

ЦитироватьValerij писал

ЦитироватьBoom!

Moment of ignition for the latest SpaceX Merlin 1D engine test in McGregor, Texas.

Here's the video and photo sequence below. We had a great angle for the big bada boom.



test complex from the approach angle, with water flow to buffer sonic shock



Venting on final countdown... (with the F9 test tower in the distance on the right)



ignition





The heat scorched the grass (our view afterward from the top of that F9 test tower, looking back):


http://www.flickr.com/photos/jurvetson/7971308188/in/photostream/

А это небольшое видео, в том числе тест двигателей:
http://www.youtube.com/watch?v=rZI6U4an-V0
"Были когда-то и мы рысаками!!!"

Salo

Цитировать
ЦитироватьIn the SpaceX Engine Test Bunker

Performing a short burst test of the Super Draco engine, which will be used by the Dragon spacecraft for multiple purposes in flight: emergency escape from launch pad to space, maneuvering in orbit, and propulsive landing on Earth... or Mars.

Short video and more photos below, from the SpaceX engine test facility in McGregor, Texas.



Walking into the bunker


Overview from Elon


View from the remote cam


Post burn glow



Оригинал: http://www.flickr.com/photos/jurvetson/7968391918/in/photostream/
Короткое видео, из которого взяты некоторые кадры, здесь:
http://www.youtube.com/watch?v=rZI6U4an-V0
"Были когда-то и мы рысаками!!!"

Salo

#271
ЦитироватьSpaceX Falcon 9 Test Tower Tour




We went to the top of the structure on the right

The water gravity-feeds from the water tower on the left. It's the tallest water tower in Texas, and we already know that everything's bigger in Texas.

The diagonal elevator runs up the concrete pillar in the rear:


View from the top


Walking among the five Merlin engines

We have to move Kimbal before the motors can gimbal... =)

And here's a video from earlier in the day of what it looks like when just one of these engines lights up. http://www.youtube.com/watch?v=rZI6U4an-V0
Оригинал: http://www.flickr.com/photos/jurvetson/7983666878/in/photostream/
"Были когда-то и мы рысаками!!!"

Salo

http://www.spacenews.com/launch/120914-ses-launch-order-adds-spacex-backlog.html

Fri, 14 September, 2012
SES Launch Order Adds to SpaceX Backlog
By Peter B. de Selding
...
 SpaceX President Gwynne Shotwell said here Sept. 11 during World Satellite Business Week that SpaceX has completed the design and the first model of the new fairing, with testing to start in a month or so. Qualification tests of the Merlin 1D have already begun and are scheduled to continue to the end of this year, she said...
"Были когда-то и мы рысаками!!!"

Salo

"Были когда-то и мы рысаками!!!"

Salo

http://www.aviationweek.com/Article.aspx?id=/article-xml/AW_09_17_2012_p40-495349.xml&p=2

ЦитироватьStill, despite a series of lengthy delays and a few nail-biting technical issues—last-minute hardware mods on the launch pad and an engine anomaly—the Falcon 9 family is widely seen as a technological success brimming with commercial promise in an industry generally averse to innovation and risk. So far, few details of the Falcon 9 v1.1 have emerged, though qualification testing of the new rocket's more powerful Merlin engine, the Merlin 1D, is expected to wrap up by year-end.

With 50% more thrust than the Merlin 1C, the 1D will enable Falcon 9 v1.1 to loft as much as 4,850 kg (10,692 lb.) to geostationary orbit from Cape Canaveral AFS, Fla. "It's a much higher-thrust engine, but surprisingly a lot of the infrastructure of that engine is the same," says SpaceX President Gwynne Shotwell. The chamber itself is the same. "The difference is instead of plating it, we're brazing on the jackets."

The nozzle, too, is different: "We use a tube-wall nozzle on the 1C and we're using the milled copper for the nozzle extension," she says.

Another change, she says, involves the rocket's nine Merlin 1D engines, which will be positioned in an octagonal configuration, rather than the "tic-tac-toe" placement on the current Falcon 9.
"Были когда-то и мы рысаками!!!"

Salo

http://www.aviationweek.com/Blogs.aspx?plckBlogId=Blog:04ce340e-4b63-4d23-9695-d49ab661f385&plckPostId=Blog%3A04ce340e-4b63-4d23-9695-d49ab661f385Post%3A8039e573-151a-434a-808d-bb5a8a3ad59b
ЦитироватьEuroconsult: Five Minutes With SpaceX[/size]

Posted by Sean Meade 9:14 AM on Sep 17, 2012

AWST: As a percentage, how much difference is there between Falcon 9 and Falcon 9 v.1.1?

GS: It's the same tank architecture, it's the same fundamental process on the interstage, I believe it's the same evolved subsystem. The engines are largely the same. Even though its more thrust, the chamber geometry is the same. The chamber itself is the same, the difference is instead of plating it, we're brazing on jackets. The nozzle is different. We use a tube wall nozzle on the [Merlin] 1C and we're using the milled copper for the nozzle extension. It's a much higher thrust engine but surprisingly a lot of the infrastructure of that engine is the same.[/size]
"Были когда-то и мы рысаками!!!"

Александр Ч.

ЦитироватьAnother change, she says, involves the rocket's nine Merlin 1D engines, which will be positioned in an octagonal configuration, rather than the "tic-tac-toe" placement on the current Falcon 9.
Пытаются уменьшить взаимное влияние?
Ad calendas graecas

Salo

Скорее уменьшить нагрузки на нижнее днище.
"Были когда-то и мы рысаками!!!"

SFN

было почемуто в теме про SPX-1. ( На SPX-1 M-1C стоят
Цитировать
ЦитироватьElon Musk @elonmusk
Now test firing our most advanced engine, the Merlin 1D-Vac, at 80 tons of thrust. pic.twitter.com/HGK1joVQ
1 октября 12 в 2:01

Ramarus

Вот вопрос, это же не вакуумная камера?