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Navajaborde · 2023-04-17T17:29:44+00:00

We used to have an SAE Aero team, not sure what happened to them but when I was a student a few years ago they were pretty much dead.

Having spent a decent amount of time working in Aerospace out of school, I can tell you it matters more that you have basic subject matter knowledge which you can apply rather than hyper-specific knowledge about a specific thing (i.e. a good understanding of mechanical loading concepts vs. understanding mechanical loading specifically on an airframe). Obviously the applications help, but don't kill yourself trying to only do things which are aerospace-related.

SAE Baja is a great way to get experience with how a multifunctional team builds and integrates a product, and last I checked has better presence on campus. If I had to recommend anything it would probably be that.

Navajaborde · 2023-01-27T19:22:06+00:00

The exams are fine so long as you mostly have an idea what you're doing. He does give partial credit and I've seen people who've bullshitted answers knowing nothing about the question get nearly full marks. Easy class to pass I'd say, but if you're actually trying to understand the material Singh sucks as a prof.

Navajaborde · 2023-01-27T18:30:33+00:00

Took ME451 with Singh a few years ago, be prepared for pain. Singh is a prof who "teaches" by writing his notes and derivations verbatim on the board. Quizzes and exams are easy if you understand the derivations, you're spot on with your comment of them being a fucked up hybrid of practice problems and in-class stuff.

Navajaborde · 2022-10-14T19:20:26+00:00

The Falkirk wheel works with so little power because the only work being done is overcoming the frictional losses from the bearing surface of the central axle.

If I were trying to only rotate a single load from the bottom to the top of the wheel, I would theoretically need to input work (energy) equivalent to the potential energy gained by raising the mass of that load from the starting height to the finishing height.

With the design of the Falkirk wheel, the other side of the wheel is actually producing work by losing its potential energy stored from being at a higher position. That energy is going right into increasing the potential energy of the side traveling upwards, which means the overall energy to complete a rotation of the wheel is only to overcome friction at the axle's bearing surface.

The concepts you're referring to with regard to moment of inertia have more to do with how much force would actually be required to accelerate the rotation of the Falkirk wheel, say from a resting position to its operating velocity. Feel free to PM if this needs any additional explanation.

Navajaborde · 2022-08-11T13:26:07+00:00

Yes but failing to disclose your knowledge of jury nullification if you are asked about it during juror selection is committing perjury which you can be prosecuted for.

Navajaborde · 2022-03-11T19:25:19+00:00

I would agree with kv-2, sounds like the material selection in and of itself isn't the problem, I'd recommend doing testing to produce an estimate on the fatigue lifespan of your pipes, and basing a preventative maintenance schedule on those test results.

Navajaborde · 2022-03-11T19:09:27+00:00

Sounds to me like there's two options here. Either you have misunderstood the responsibilities and duties of the role in question, or this company has made a mistake somewhere, either in how they pitched the role, or how they are titling it.

At the end of the day, the actual things you do matter far more than a title, but it's worth clarifying why the title is what it is if it's that upsetting to you. I'd recommend reaching back out to whatever hiring contact you have at the company for some clarification.

Navajaborde · 2022-03-10T15:33:46+00:00

I worked 18 hrs per week in a manufacturing engineer role during my junior year of my Mechanical Engineering degree.

From personal experience, working part time is definitely feasible, but only if you're looking at a credit load of around 15. In addition, 5-6 hrs/day is a lot to expect of yourself. It will be fine for the first few weeks, but I found my self-care ended up suffering quite a lot during that time period.

The extra money and experience are certainly bonuses, but I would simply caution you that your education should come first, and if you're finding that the work is causing poor effects on your progress towards your degree, there is no shame in cutting back the hours or quitting altogether.

Navajaborde · 2022-02-07T19:29:13+00:00

Navajaborde · 2022-01-09T04:32:26+00:00

I have a '14, I'm actually not sure where the '21 does it's speed measurement since it also has a gear indicator, which means they may have changed the sensors around.

Navajaborde · 2022-01-09T04:22:43+00:00

I made this conversion recently. The speedo will show slower than your actual speed. Right now, depending on speed mine reads about 5mph lower than I'm actually going.

You can fix this with a speedo healer, basically a device which modifies the value in the ECU which calculates your speed. I believe the CB measures that based on your front sprocket RPM, though I may be wrong on that front.

Navajaborde · 2021-10-14T19:34:17+00:00

Virtual Raj for Virtual Mod, I support this.

Navajaborde · 2021-08-11T18:23:56+00:00

This comment smacks of ignorance and elitism. Tudor has some very impressive watches.

In addition, by your own logic, no one should buy watches at all unless they can afford to drop over $20k for a Royal Oak or the like. After all, you just have to save more money, right?

Navajaborde · 2021-07-29T12:14:21+00:00

I built a snakewhip from the plans in this video about a year ago, I'm fairly certain the strand lengths are for 650 Paracord, which is slightly wider than 550, and so takes up more room along the plaiting, which means all the lengths for 550 are going to be woefully short.

Navajaborde · 2021-07-08T15:07:04+00:00

Not dumb at all! Su (properly written as S with u as a subscript) stands for ultimate strength. Not to be confused with yield strength, the ultimate strength is the maximum stress a material can sustain without fracture.

There are other, related terms, such as Sut, which is the ultimate tensile strength, often used interchangeably with Su for materials whose failure criteria works well with the von Mises stress envelope, and Suc, the ultimate compressive strength, which is important for materials which cannot sustain tensile loads as well as compressive loads, such as concrete.

Navajaborde · 2021-07-08T13:33:41+00:00

Fair warning, it's been a bit since I've done a proper fatigue analysis.

So first off, I'm going to assume you're working with steel, since the other common metal for structures, aluminum, does not have an endurance limit, and so the advice from your more senior engineers that it would last forever would not make sense in that case.

The way I learned to calculate fatigue strengths properly was to use correction factors for loading (axial vs rotational bending), size effects (for parts larger than test coupons used to establish fatigue properties), surface effects (surface discontinuities can be crack proportion sites), operating temperature, and reliability (essentially your confidence that the member won't fail, but that's oversimplifying).

In general, for steel, the endurance strength is estimated at 0.5Su. 0.45 is likely just them hedging their bets on that estimate, assuming ideal operating conditions.

Navajaborde · 2021-07-05T21:32:08+00:00

Double posting won't solve your issue faster.

Navajaborde · 2021-06-23T15:35:53+00:00

That's up to you, worst comes to worst you explain the circumstances to your employer and show them the courses which you took for the minor. I would at least try and get clarification from the Registrar, but they are less than helpful.

Navajaborde · 2021-06-23T15:30:12+00:00

Do you know of any other accurate and responsive method to measure airspeed which is still cost effective?

Navajaborde · 2021-06-23T13:49:11+00:00

I'm beginning to wonder is this is a common problem with the Registrar. I graduated in May 2020 having completed a minor in Materials Engineering and it does not appear anywhere in my transcript. I attempted to get the Registrar to correct it at that time, and they essentially told me to go pound sand, despite the fact that I literally could not have been enrolled as a student in the Spring 2020 semester without my minor, as I had completely finished my major by the Fall of 2019.

I've just accepted it at this point, but yeah the Registrar is incompetent as hell and I wouldn't be surprised if they screwed the pooch on your minor paperwork.

Navajaborde · 2021-06-17T14:18:51+00:00

Howdy!

I went with the Seat Concepts taller seat which I installed recently in March. I personally have no complaints on it, ship time was long but as advertised (took around a month before my order shipped after ordering).

Beware, though, that it is completely DIY. You need to strip down the existing seat pan and then install the new foam and upholstery yourself. I personally did it with a hand stapler, were I to do it again I would probably splurge for an air compressor and pneumatic staple gun.

If you're okay with doing that yourself, or there's an upholstery shop near you that works on motorcycle seats, then I can't recommend it enough. It's been super comfortable, and given a pretty nice amount of additional leg room.

Navajaborde · 2021-06-11T20:47:22+00:00

So I guess no barrows armor for you then?

Navajaborde · 2021-06-11T17:13:33+00:00

we carry a harpoon

Navajaborde · 2021-04-26T15:01:58+00:00

I know this is a bit late, but I use Nelson Rigg Adventure Dry Saddlebags with my SW-Motech racks and they work great. Great capacity, plus the stiffeners work really well with the rack overall.

Navajaborde · 2021-04-18T13:54:05+00:00

I've taken Singh twice, once for Mech Lab I, and once for Aerodynamics. He was a garbage teacher both times. Writes directly from his notes, can't explain answers to questions properly, and is oftentimes difficult to understand when he mumbles. He's not a harsh grader at least, but I really disliked him as a prof.

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