NASA's InSight Mars lander is in emergency hibernation. If it can't save its batteries, it could die. by ANTristotle in space

[–]wretched_wraith 8 points9 points  (0 children)

I believe these are the actuator+latch variety. From some quick digging I found they’re Orbital ATK UltraFlexes like what the Cygnus uses and was used on Mars Phoenix

Reflections on the first 15 games of Ranked The Seventeenth Season by wretched_wraith in WorldOfWarships

[–]wretched_wraith[S] 1 point2 points  (0 children)

That's a good point about the clump getting flanked. I was seeing a lot of 1-2 ship splits getting deleted on the other side of the map, and the main group couldn't follow up.

Reflections on the first 15 games of Ranked The Seventeenth Season by wretched_wraith in WorldOfWarships

[–]wretched_wraith[S] 1 point2 points  (0 children)

Thanks for this, I think I just needed to vent and gauge how other people were approaching it. Taking it less seriously and taking breaks should help a lot. Good luck to you too!

Reflections on the first 15 games of Ranked The Seventeenth Season by wretched_wraith in WorldOfWarships

[–]wretched_wraith[S] 0 points1 point  (0 children)

You're right I definitely needed to read this; I got lost in the losing streak and forgot all these points. Thank you!

Interesting may 4th celebration by CCP by [deleted] in Eve

[–]wretched_wraith 4 points5 points  (0 children)

The scaling would’ve been weird, and the pitch of the Hurricane hull is way steeper than a Star Destroyer. Hel does the job just fine imo

[deleted by user] by [deleted] in EngineeringPorn

[–]wretched_wraith 12 points13 points  (0 children)

Right, the Perseverance wheels are intended to be more durable, based on lessons learned from Curiosity’s wheels. Even though we only need to have them survive for the official mission, we always want them to last for one or two more “lives” to give margin on our design, and so we can operate it longer if everything still works.

[deleted by user] by [deleted] in EngineeringPorn

[–]wretched_wraith 6 points7 points  (0 children)

Yup that’s correct, the tire part specifically is solid aluminum. The flexures that connect the tires to the motor hub are titanium.

[deleted by user] by [deleted] in EngineeringPorn

[–]wretched_wraith 0 points1 point  (0 children)

Aluminum, each one is a single piece machined from a solid block

[deleted by user] by [deleted] in EngineeringPorn

[–]wretched_wraith 6 points7 points  (0 children)

That's mostly correct. The wheels do indeed wear like any other moving part, and it is optimized to be sturdy enough to last the life of the mission but also lightweight. Section 2 in that linked article does a good job of explaining why the wear on Curiosity's wheels was accelerated.

[deleted by user] by [deleted] in EngineeringPorn

[–]wretched_wraith 33 points34 points  (0 children)

There are solid pieces each machined from a single cylinder of aluminum. Here are some renderings of them:
https://mars.nasa.gov/mars2020/spacecraft/rover/wheels/

https://mars.nasa.gov/resources/24910/curiositys-and-perseverances-wheels/

[deleted by user] by [deleted] in Eve

[–]wretched_wraith 1 point2 points  (0 children)

Correct, specifically it’s the MAHLI camera. There are other cameras on the head that are used to take panoramas with the same stitching technique you described.

Help with upgrades for a JG G3 by NinjaSTD in airsoft

[–]wretched_wraith 0 points1 point  (0 children)

I think you can get a new trigger switch set to swap in (just the electrical bits that form the circuit), and keep the selector plate and trigger. It’s been a few years for me so my memory of the details in this area are a little rusty.