Author Topic: Blue Origin's BE-4 Engine  (Read 1166528 times)

Offline Vettedrmr

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Re: Blue Origin's BE-4 Engine
« Reply #2620 on: 02/03/2024 12:19 am »
Well, torch igniters are one-offs.

Not necessarily.  Raptor uses dual-redundant torch igniters that are restart capable.  But in any case, I'm glad to see BE-4 up and running on this test stand.  Really want to see both launch systems (NG and SS) operational.

Have a good one,
Mike
Aviation/space enthusiast, retired control system SW engineer, doesn't know anything!

Offline Gliderflyer

Re: Blue Origin's BE-4 Engine
« Reply #2621 on: 02/03/2024 12:48 am »
Yeah, the whole point of torch igniters is that they are reusable. I doubt they were using TEA TEB for ignition, you kinda have to fire hose it in to get stuff to ignite so you end up with a much more sustained green and not just a quick flash. It was probably just some little bit of copper that burnt off of something (it happens).

Also, while the video made it seem like a short burn, it ran for about a minute.
I tried it at home

Offline Starshipdown

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Re: Blue Origin's BE-4 Engine
« Reply #2622 on: 02/03/2024 01:01 am »
Well, torch igniters are one-offs.

Not necessarily.  Raptor uses dual-redundant torch igniters that are restart capable.  But in any case, I'm glad to see BE-4 up and running on this test stand.  Really want to see both launch systems (NG and SS) operational.

Have a good one,
Mike

Which turned out to be very complex for them and they were replaced with... some kind of secret sauce ignition system, though the lox and powerhead still use them.
« Last Edit: 02/03/2024 01:07 am by Starshipdown »

Offline FutureSpaceTourist

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Re: Blue Origin's BE-4 Engine
« Reply #2623 on: 02/07/2024 02:59 pm »
Crosspost:

https://twitter.com/torybruno/status/1755259367668998298

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Nothing quite as pretty on a Wednesday morning as a brand new shiny #BE4 rolling over to get installed on the next #Vulcan...

Online Rakietwawka2021

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Re: Blue Origin's BE-4 Engine
« Reply #2624 on: 02/07/2024 08:27 pm »
Those ATP tests took looong time

Offline Robert_the_Doll

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Re: Blue Origin's BE-4 Engine
« Reply #2625 on: 02/13/2024 11:54 pm »
Possible BE-4 firing:

https://twitter.com/TeamRedstone/status/1757490369317499111
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The rumble you may hear today, Feb. 13, is the sound of rocket engine hot-fire testing at Redstone Arsenal.

Offline Torlek

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Re: Blue Origin's BE-4 Engine
« Reply #2626 on: 02/21/2024 01:11 am »
Definite BE-4 test tonight. That thing rumbles with a purpose. Feels like a train passing within 10 m from about 10 km out.

Offline Robert_the_Doll

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Re: Blue Origin's BE-4 Engine
« Reply #2627 on: 02/21/2024 04:53 pm »
We have confirmation in the Aviation Week and Space Technology article that BE-4s for New Glenn are in qualification and currently remain on track for installation on the the pathfinder for a hotfire this summer:
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“There are some deltas between the two that flew on Vulcan and ours that we are qualifying,” Jones said. “That will be done very soon … I won’t be waiting on engines.”

Offline Torlek

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Re: Blue Origin's BE-4 Engine
« Reply #2628 on: 02/28/2024 06:30 am »
Seems like they're trying to test them every four days or so on the stand in Huntsville. Test this evening was extremely long, at least eight minutes. At 2 km out you almost need hearing protection and you feel the vibrations in your chest and through the ground.

Offline Robert_the_Doll

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Re: Blue Origin's BE-4 Engine
« Reply #2629 on: 03/01/2024 10:17 pm »
New video dropped. It has some of the footage from the Facebook video, but there is more, including historic film footage from the 1960s:


Offline Robert_the_Doll

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Re: Blue Origin's BE-4 Engine
« Reply #2630 on: 03/04/2024 06:12 pm »
This post provides a good close up view of a BE-4 at Huntsville's final assembly area. Note the detail, especially the outlet and the rest of the assembly hall area in the background:

https://www.facebook.com/photo/?fbid=712521290995558&set=a.500432992204390

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“I’m inspired by our mission and its legacy, which will make history and create opportunities for future generations,” - Joshua Payne, Technical Designer for New Glenn.

Joshua is a member of our Business Resource Group, New Jackson, which supports Black, African, African American, West Indian, or of African descent employees at Blue.

Space is for everyone. Join us: https://bit.ly/3rUFZyR

#BlackHistoryMonth #Space #ForTheBenefitofEarth


Offline Starshipdown

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Re: Blue Origin's BE-4 Engine
« Reply #2631 on: 03/05/2024 12:50 am »
Interesting details to be sure of the engine, but I think that's Kent, not Huntsville. I'd be interested in knowing when that photo was taken since we've not heard much about Kent for engine production or much of anything else in a very long while.

Online Rakietwawka2021

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Re: Blue Origin's BE-4 Engine
« Reply #2632 on: 03/05/2024 06:04 am »
Thye said some time ago that they were still running production in Kent

Offline Starshipdown

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Re: Blue Origin's BE-4 Engine
« Reply #2633 on: 03/05/2024 10:43 am »
That was a long, long time ago, and Tory Bruno stated in a tweet last year that Huntsville was coming up with engines far faster, so the engines for Cert-2 and subsequent missions as well as for New Glenn will be from there as well. This indicates that things are winding down at Kent.

Offline whitelancer64

Re: Blue Origin's BE-4 Engine
« Reply #2634 on: 03/05/2024 03:32 pm »
It is my understanding that development work is still being done at Kent. Huntsville is for mass production. Kent is and will be working on upgrades, design tweaks, etc. and that will flow down to Huntsville.
"One bit of advice: it is important to view knowledge as sort of a semantic tree -- make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there is nothing for them to hang on to." - Elon Musk
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Offline lrk

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Re: Blue Origin's BE-4 Engine
« Reply #2635 on: 03/05/2024 03:55 pm »
Or it's green because they're testing out TEA-TAB type igniters for an air-restart BE-4 for New Glenn. If it was anything other than that, the engine would've eaten itself and RUD in short order.

It doesn't take much copper vaporizing to add a green tinge to the flame - I wouldn't be surprised if there was a small amount being liberated during start-up transients.  If the chamber wall is too thick in some places, then cooling will be reduced and the wall will erode until it is thin enough for sufficient regenerative cooling.  We saw the same thing sometimes during raptor startup.  So, I wouldn't say it is necessarily a bad sign, or indicative of imminent failure.

Offline JCRM

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Re: Blue Origin's BE-4 Engine
« Reply #2636 on: 03/05/2024 04:39 pm »
It doesn't take much copper vaporizing to add a green tinge to the flame

It's more than just a tinge, but definitely transient


Offline Robert_the_Doll

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Re: Blue Origin's BE-4 Engine
« Reply #2637 on: 03/07/2024 09:26 pm »
https://twitter.com/Harry__Stranger/status/1765845111970447787
Quote
A new image from Blue Origin of BE-4 on the stand last month: https://blueorigin.com/news/gallery

"Blue Origin’s BE-4 engine readies for hotfire at Marshall Spaceflight Center Test Stand 4670 (February 1, 2024)."


Online dglow

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Re: Blue Origin's BE-4 Engine
« Reply #2638 on: 03/08/2024 09:51 am »
https://twitter.com/Harry__Stranger/status/1765845111970447787
Quote
A new image from Blue Origin of BE-4 on the stand last month: https://blueorigin.com/news/gallery

"Blue Origin’s BE-4 engine readies for hotfire at Marshall Spaceflight Center Test Stand 4670 (February 1, 2024)."

What is Blue’s need to use Marshall rather than Van Horn?

Online LouScheffer

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Re: Blue Origin's BE-4 Engine
« Reply #2639 on: 03/08/2024 12:04 pm »
What is Blue’s need to use Marshall rather than Van Horn?
Just guessing, but I can think of several potential reasons:

a) They would like to do testing with the engine vertical, a configuration closer to how it will be used.

b) They would like at least two physically separate test stands so a single failure can't derail their (and ULA's) whole schedule.

c) Sometimes it's helpful separate by purpose.  Maybe R&D tests at Van Horn, acceptance tests at Marshall.

All this is pure speculation.

 

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