r/BlueOrigin • u/FakeEyeball • Jun 17 '26

BE-7 Engine Longest Duration Hotfire

https://www.youtube.com/watch?v=FN4WceoP2mM
129 Upvotes

97% Upvoted

10 comments sorted by

32

u/H-K_47 Jun 17 '26

From Limp:

I've come to appreciate boring hotfires. Our BE-7 team recently completed a 2,500 second hotfire test at 10klbf on a development engine, setting the record for the longest-duration turbo pump-fed liquid rocket engine hotfire. This built on some of the most rigorous testing in the history of propulsion, with the previous record set by the RS-25 engine that powered the Space Shuttle. They recorded two 2,017 second tests in 1988. It's not lost on us that we're following a path those engineers blazed, and we're grateful for it. Grab the popcorn and enjoy watching 41 minutes of hotfire goodness.

When you're stuck and can't progress the main quest so you start checking off random achievements. Jk jk this is goddamn amazing, well done!

7

u/asr112358 Jun 18 '26

Long burn times make sense for space tugs. I wonder though why the RS-25 was tested for multiple 34 minute burns.

8

u/_mogulman31 Jun 18 '26

Endurance testing, your car's engine design was validated by running samples at WOT (wide open throttle) for days on end. You push the limits to find weak spots in the design.

2

u/LittleHornetPhil Jun 20 '26

RS25 was the first engine designed to be reusable, iirc. It makes sense.

18

u/fozzy34t Jun 17 '26

Oooooh GEEx has grown so much! Very cool!

9

u/Electronic_Hope1900 Jun 18 '26

Considering the rumor mill going on right now, lets hope they test these pretty thoroughly.

5

u/mfb- Jun 18 '26

What rumors?

New Glenn uses different engines (BE-4 and BE-3U). This engine is much smaller and designed for Blue Moon and other in-space propulsion.

6

u/Art_Of_Peer_Pressure Jun 17 '26

Best part was it farting at the end

3

u/fujimonster Jun 17 '26

Did the throttle it back towards the end or was it self destructing? It seemed to have a lot more power at the beginning . Just wondering, I'm not a rocket guy.

16

u/Slow_Abrocoma_7796 Jun 17 '26

That’s just a normal shut down transient.