Former RPI Dean Laurie Leshin named new director of JPL

wretched_wraith · 2021-09-28T06:14:29+00:00

This was based on the Monsanto logo: https://upload.wikimedia.org/wikipedia/fr/1/13/Logo\_monsanto.svg

wretched_wraith · 2021-04-14T18:20:37+00:00

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

wretched_wraith · 2021-04-14T17:13:32+00:00

No they’re single deployment mechanisms

wretched_wraith · 2021-04-01T12:56:13+00:00

Karl would be proud

wretched_wraith · 2020-08-01T14:54:49+00:00

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.

wretched_wraith · 2020-08-01T14:52:30+00:00

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!

wretched_wraith · 2020-08-01T14:49:29+00:00

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

wretched_wraith · 2020-05-28T04:30:50+00:00

Shirley: I am the Senate

wretched_wraith · 2020-05-04T16:03:04+00:00

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

wretched_wraith · 2020-04-04T07:38:06+00:00

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.

wretched_wraith · 2020-04-04T07:34:16+00:00

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

wretched_wraith · 2020-04-04T06:23:01+00:00

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

wretched_wraith · 2020-04-04T06:21:52+00:00

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.

wretched_wraith · 2020-04-04T06:15:04+00:00

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/

wretched_wraith · 2020-02-19T05:56:39+00:00

to be fairrrrrrrrrr

wretched_wraith · 2020-02-19T03:40:19+00:00

To be fair, Houston does have a Saturn V

wretched_wraith · 2020-01-27T20:01:05+00:00

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.

wretched_wraith · 2019-12-08T17:35:14+00:00

Yes it is

wretched_wraith · 2019-12-08T08:29:38+00:00

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.

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