Blue Origin's BE-7 engine

[AS-503]

Agree with meekGee.
The F1 had a traditional gimbal on the top of the thrust chamber.
Another clue is that the photos clearly show the struts that are actuated by the hydraulic ram are connected to the thrust chamber NOT the nozzle.
It it was a nozzle gimbaled design the struts would be on the nozzle.

[sevenperforce]

I feel like the load paths for a virtual gimbal about the nozzle throat would be hella challenging. You're talking about truly immense forces and the natural geometry of the engine already directs those forces up the nozzle and into the combustion chamber axially. Trying to transfer a load into gimbals mounted anywhere other than the chamber...yikes.

[edzieba]

The disadvantage of course is that the throat now has to have the ability to flex.

The diagram is misleading: there is no flex at the throat, the engine gimbals about an axis within the throat, but that just means the powerhead swings about the pivot in the opposite direction to the nozzle. The main impact of this is clearance within the engine bay, and that instead of one propellant feed line translating and rotating and one just rotating (assuming it is routed through a topend gimbal) both feed lines translate and rotate. This is not uncommon for vernier engines (e.g. Atlas, Thor, Soyuz).

[FutureSpaceTourist]

https://twitter.com/blueorigin/status/1803789703004430524

Here’s a BE-7 engine headed into vacuum cell testing in a simulated space-like environment at Air Force Research Laboratory, Edwards Air Force Base, CA. BE-7 generates 10,000 lbf of thrust and powers our Blue Moon MK1 and MK2 lunar landers.

[FutureSpaceTourist]

https://twitter.com/blueorigin/status/1825925995892797800

BE-7 engines power our Blue Moon MK1 and MK2 lunar landers. Grateful to partner with @AFResearchLab at Edwards Air Force Base, CA, where we conduct BE-7 testing in a vacuum cell to simulate a space-like environment. Here’s the team after a successful full-duration test that included ignition.

[Robert_the_Doll]

https://twitter.com/davill/status/1825944824551555290

Here’s another view of a BE-7 in testing. Great to see the team’s progress at Edwards. BE-7 has a novel high-performing dual-flow closed expander cycle. MK1 has one BE-7 engine, and our larger MK2 crewed lander, part of the Artemis effort, is powered by three BE-7s.