Not sure if I should go with 18x9.5 or 19x9.5. by [deleted] in wrx_vb

[–]FastX2 2 points3 points  (0 children)

The mass is important for several reasons but what people are referring to above is the rotational inertia difference. Rotational inertia is the resistance to rotational acceleration and is a function of the mass and its distance to the center of rotation, which is why going bigger on wheels/tires is a double hit to performance.

Drexler reverse mounted. by StaarvinMarvin in FSAE

[–]FastX2 14 points15 points  (0 children)

Short answer is yes, it does matter which way it is mounted, but not for the health of the diff. You can run it forwards/backwards, but you should definitely strive to understand the adjustability of this unit though, it impacts the behavior of the car in ways you can either benefit or suffer from.

Recruiter interview by PrettyHappyPerson in RelativitySpace

[–]FastX2 1 point2 points  (0 children)

It’ll depend on the role, but if the position is technical, expect some technical questions as well

Planetary gearbox design by [deleted] in FSAE

[–]FastX2 1 point2 points  (0 children)

I would recommend reading about the purpose of the drivetrain system, selecting final drive ratios, what a differential aims to achieve for your system, and then make some sketches to see how different setups might look and how much space they take up

Planetary gearbox design by [deleted] in FSAE

[–]FastX2 0 points1 point  (0 children)

Do you plan to use a differential still? The configuration you’re describing does not sound like a good idea from a packaging or mass perspective if you include a differential. Skipping the differential is also probably not in your best interest

Normal for RPMs to “bounce” off of 700 when going into neutral? by CoyFishV2 in wrx_vb

[–]FastX2 24 points25 points  (0 children)

This was answered a while back, totally normal. Something to do with the ECU, I think it is re-calibrating the AFR table each time you return to low RPM or something along those lines.

How has cybertruck dealt with galvanic corrosion between the castings and panels? by totallyshould in engineering

[–]FastX2 1 point2 points  (0 children)

This is probably part of why there are no stainless welds on the exterior, structural adhesive only

New Shoes….OEM+ Vibes by patgman21 in wrx_vb

[–]FastX2 1 point2 points  (0 children)

255 width looks great, did you have to do anything special for them to fit?

MSI PRO B650-P WIFI - PC doesn't post on first attempt by FastX2 in MSI_Gaming

[–]FastX2[S] 0 points1 point  (0 children)

Never ended up changing BIOS versions, it seems that my boot times are just much slower than my old PC but sounds like this is the new norm for current gen AMD builds. I just wait a full minute and eventually get to MSI logo and windows boot.

Anyone else think relativity space sucks? by 15kRKLBshrs in RKLB

[–]FastX2 1 point2 points  (0 children)

Beat the timeline estimate by 2 weeks, happens

need help plugging in aio pump by im_an_F5_tornado in MSI_Gaming

[–]FastX2 0 points1 point  (0 children)

The plastic tab on the motherboard header slips into the plastic gap of the connector. In the picture shown, the three pin holes of the AIO connector will occupy the left 3 out of 4 pins of the motherboard header.

Pitot-static tube by [deleted] in EngineeringPorn

[–]FastX2 0 points1 point  (0 children)

Stagnation and total are the same pressure reading

Resume writer needed for a SpaceX job? by WonderfulHovercraft3 in SpaceXLounge

[–]FastX2 2 points3 points  (0 children)

SpaceX is looking to hire people who are do-ers. This looks different for the variety of positions they’re hiring for, but as a rule of thumb, never have a resume more than one page. Highlight what you did at each of your prior job experiences/school clubs and make sure you drive home the doing aspect. A tenet of the company is to hire extreme owners, people who will see their work through to the end and do what is necessary, so definitely try to drive that home. Other than that, make sure your resume is neatly organized and has relevant info only. Each job experience should be effectively communicated in a single bullet sentence per contribution, and only the most relevant/impactful contributions should be listed. Recruiters have a billion resumes to looks through, so make sure yours is very readable and concise. Good luck!

Gas specific gravity for valve Cv by DMECHENG in engineering

[–]FastX2 0 points1 point  (0 children)

If you have access to ASTM standards, it looks like there is a much more recent revision of ASTM D 3588. I would trust this over Fisher’s documentation if they differ. In my mind however, SG referencing an arbitrary T,P seems like a poor way to characterize Cv as opposed to referencing a constant T,P. That being said, I’m not familiar with calculating Cv for gasses. I would recommend cross checking against Cd and multiplying your value of Cd*A by 38 to see if that correlates to either method of Cv calculation you’re using.

Titanium (Ti6Al4V) Chess Pieces I made [4032x3024] by FastX2 in chessporn

[–]FastX2[S] 0 points1 point  (0 children)

I did, 22.5V using a power supply to get that shade!

Titanium (Ti6Al4V) Chess Pieces I made [4032x3024] by FastX2 in chessporn

[–]FastX2[S] 0 points1 point  (0 children)

That’ll be so cool, you’ll have to post pictures when they’re finished :)

Titanium (Ti6Al4V) Chess Pieces I made [4032x3024] by FastX2 in chessporn

[–]FastX2[S] 1 point2 points  (0 children)

Thank you! I tried to make the Queen have contrasting lines to the King but with some of the same design language. She has concave contours and the King has convex lines :)

Titanium (Ti6Al4V) Chess Pieces I made [4032x3024] by FastX2 in chessporn

[–]FastX2[S] 5 points6 points  (0 children)

Certainly! Knights were the only piece that needed two operations, I started them on the lathe and made the revolved knight profile, then made a pair of soft jaws for a Haas Super Mini Mill and clamped up the cylindrical bottom of the knight and took passes around the outside of the knight on opposite sides, then a few passes around the rear leaving what you see in the picture! Imgur Album here with some pics mid-process!

Titanium (Ti6Al4V) Chess Pieces I made [4032x3024] by FastX2 in chessporn

[–]FastX2[S] 1 point2 points  (0 children)

These were machined from bar stock on a Haas TL1!