Author Topic: Blue Origin's BE-4 Engine  (Read 1165702 times)

Offline FutureSpaceTourist

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Re: Blue Origin's BE-4 Engine
« Reply #1000 on: 12/07/2020 04:40 pm »
Cross post

https://twitter.com/torybruno/status/1336002283558072322

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iSpy a pair of BE4 Path Finder engines at the Decatur Rocket Factory. #VulcanCentaur

Edit to add:

twitter.com/thesheetztweetz/status/1336004658050031617

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Is one of these the pathfinder delivered in July? When do you expect the first flight-qualified BE-4 to arrive?

https://twitter.com/torybruno/status/1336024208023969794

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Yes. Next year
« Last Edit: 12/07/2020 06:09 pm by FutureSpaceTourist »

Offline Lemurion

Re: Blue Origin's BE-4 Engine
« Reply #1001 on: 12/13/2020 08:18 pm »
Impressive looking engines.

Offline snotis

Re: Blue Origin's BE-4 Engine
« Reply #1002 on: 12/17/2020 05:11 pm »
https://twitter.com/SciGuySpace/status/1339633465076150273

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During a call with reporters, Tory Bruno said he expects to receive "flight configuration" BE-4 engines for the Vulcan rocket "this summer." Engine performance is better than asked for, so far.

Offline FutureSpaceTourist

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Re: Blue Origin's BE-4 Engine
« Reply #1003 on: 12/17/2020 05:43 pm »
https://twitter.com/SciGuySpace/status/1339633465076150273

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During a call with reporters, Tory Bruno said he expects to receive "flight configuration" BE-4 engines for the Vulcan rocket "this summer." Engine performance is better than asked for, so far.

Worth remembering that in February 2020 Blue Origin said the flight BE-4s would arrive by the end of 2020. I’m not surprised by delays on something as complex / ambitious. 6+ months left suggests still a lot of work and, I imagine, qualification testing to go.
« Last Edit: 12/17/2020 05:44 pm by FutureSpaceTourist »

Offline FutureSpaceTourist

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Re: Blue Origin's BE-4 Engine
« Reply #1004 on: 01/09/2021 03:28 pm »
Hopefully we’ll get some test updates before too long

https://twitter.com/torybruno/status/1347942408676368386

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Now that is a beautiful sight!  A pair of @BlueOrigin BE4 engines installed on a #VulcanCentaur booster for pathfinding operations in preparation for launch in 2021. #CountdownToVulcan!

Offline FutureSpaceTourist

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Re: Blue Origin's BE-4 Engine
« Reply #1005 on: 01/26/2021 07:33 am »
Tweet from Jan 16th (from New Shephard webcast):

https://twitter.com/megsylhydrazine/status/1350264556803612672

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The #BE4 engine hotfire test from earlier this week in West Texas 🔥
« Last Edit: 01/26/2021 07:35 am by FutureSpaceTourist »

Offline Stimbergi

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Re: Blue Origin's BE-4 Engine
« Reply #1006 on: 01/28/2021 06:26 am »
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jeffbezos
Perfect night! Sitting in the back of my pickup truck under the Moon and stars watching another long duration, full thrust hotfire test of @BlueOrigin’s BE-4 engine. #GradatimFerociter
https://www.instagram.com/jeffbezos/

Offline bombyx

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Re: Blue Origin's BE-4 Engine
« Reply #1007 on: 02/14/2021 09:39 pm »
https://twitter.com/torybruno/status/1361047219923730433

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Musical_Tanks
@torybruno I have been looking for specific impulse of BE-4, can't find it. Are you able to say or is it TBD/classified kinda thing?

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Tory Bruno
Not yet released.  I can say that it is better than we expected

Offline Nomadd

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Re: Blue Origin's BE-4 Engine
« Reply #1008 on: 02/15/2021 02:07 am »
 It seems like with a rocket engine, you'd want exactly what you expected. Anything else means you don't quite know what's going on in there. Could it be pessimistic combustion efficiency assumptions?
Those who danced were thought to be quite insane by those who couldn't hear the music.

Offline b0objunior

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Re: Blue Origin's BE-4 Engine
« Reply #1009 on: 02/15/2021 07:27 am »
It seems like with a rocket engine, you'd want exactly what you expected. Anything else means you don't quite know what's going on in there. Could it be pessimistic combustion efficiency assumptions?
You can be optimistic or conservative, better to be the latter.

Offline Davidthefat

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Re: Blue Origin's BE-4 Engine
« Reply #1010 on: 02/15/2021 05:23 pm »
It seems like with a rocket engine, you'd want exactly what you expected. Anything else means you don't quite know what's going on in there. Could it be pessimistic combustion efficiency assumptions?

You can allocate more mass to your payloads when you have better performance than anticipated.

Online Cheapchips

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Re: Blue Origin's BE-4 Engine
« Reply #1011 on: 02/15/2021 05:46 pm »
It seems like with a rocket engine, you'd want exactly what you expected. Anything else means you don't quite know what's going on in there. Could it be pessimistic combustion efficiency assumptions?
You can be optimistic or conservative, better to be the latter.


Being a "medium-performing version of a high-performance architecture" presumably means the latter?

Offline Redclaws

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Re: Blue Origin's BE-4 Engine
« Reply #1012 on: 02/15/2021 05:52 pm »
It seems like with a rocket engine, you'd want exactly what you expected. Anything else means you don't quite know what's going on in there. Could it be pessimistic combustion efficiency assumptions?

I feel like this is confusing contexts for expectations.  Tory is speaking about expectations based on some set of promises made to him as a customer, based on certain earlier assumptions about what Blue’s engineers would be able to achieve.

They did better.  Tory’s not suggesting they fired up the engine and it was just randomly much better than expected (that would maybe be concerning).  It’s just, at some point, they were able to make it work better than they originally hoped.

I don’t think 2010 SpaceX would’ve told you they thought they expected to get Merlin thrust to its current levels.

Offline Tomness

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Re: Blue Origin's BE-4 Engine
« Reply #1013 on: 02/15/2021 06:07 pm »
Wasn't the Air Force and ULA that asked Blue to increase the BE-4 From 450,000 lbf to 550,000 lbf. Which helped increase their New Glean from their original internal specs. They might have been able to hit 300-315 Isp

Offline whitelancer64

Re: Blue Origin's BE-4 Engine
« Reply #1014 on: 02/18/2021 05:35 pm »
What is the size of the BE3 compared to the BE4?
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Offline kendalla59

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Re: Blue Origin's BE-4 Engine
« Reply #1015 on: 02/21/2021 08:24 pm »
What is the size of the BE3 compared to the BE4?

BE-3 is 490kN vs 2400kN for BE-4, roughly 5 times more thrust.

Offline DreamyPickle

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Re: Blue Origin's BE-4 Engine
« Reply #1016 on: 02/25/2021 03:43 pm »
SpaceNews quote from Blue Origin regarding BE-4 progress link:

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Jones said Blue Origin intends to deliver flight qualified BE-4 engines to United Launch Alliance on time for ULA’s planned maiden launch of its Vulcan rocket late this year. “We’re hot firing regularly and every time you turn around, we’re doing additional tests,” he said. “We have over 11,000 seconds of accumulated test time and we feel confident.”

Seem to still be on track for a 2021 launch of Vulcan, though earlier reports mention delivery "this summer" rather than "late this year". Is the 11000 seconds of test time number new?

Offline AstroWare

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Re: Blue Origin's BE-4 Engine
« Reply #1017 on: 02/27/2021 04:07 am »
I wonder if BE4 is going to find any issues once they are clustered. It's being used in two very different enviorments. Dual engine with nearby solids... Tight clustering on New Glenn, especially the center engine.... Retro propulsion...

ULA is at least planning a flight readiness firing I believe  on the pad before launch. (anyone know the planned duration?)

Is New Glenn planning something similar on the Pad?

Just curious. 

Offline TrevorMonty

Re: Blue Origin's BE-4 Engine
« Reply #1018 on: 02/27/2021 12:42 pm »
I wonder if BE4 is going to find any issues once they are clustered. It's being used in two very different enviorments. Dual engine with nearby solids... Tight clustering on New Glenn, especially the center engine.... Retro propulsion...

ULA is at least planning a flight readiness firing I believe  on the pad before launch. (anyone know the planned duration?)

Is New Glenn planning something similar on the Pad?

Just curious.
I doubt Vulcan pad test will be much more than few seconds. Their water deluge system is design for few seconds of launch.

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Offline CorvusCorax

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Re: Blue Origin's BE-4 Engine
« Reply #1019 on: 02/28/2021 12:09 am »
Crossposting this, as it kinda belongs here. I'm sorta surprised I haven't seen that here yet.

I found this video on the tube that goes a bit into analysing the various components of the BE-4 engine and what they do. Quite informative, and I think quite a bit more rare than info on the Raptor.



 

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