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  1. lucky-guesser

    Layoffs 2024-2025 ??

    Not because of politics, but because so few people want them. Numerous policies have been in place for 5-10 years to encourage people to switch, and people just don't want to. Kalifornia has (had?) a bill on the books to require X% car sales each year to be electric (maybe it was hybrid, but...
  2. lucky-guesser

    Suspension Factors Behind Mustang S550 Crashes in Parking Lot Exit Scenarios

    Its not just the S550. 'stangs have been known for this for decades.
  3. lucky-guesser

    Forging gear

    The gears may mate up to other gears the same, but other thicknesses/geometry could be different to where company A need the rib for strength but company B can get away without it. Metallurgy could also be different. If you would of to try modifying one, I would do extensive testing before...
  4. lucky-guesser

    Two-slider crank mechanism

    You think gears are too costly and difficult to manufacture, so to get away from gears, you create a motor with the most convoluted piston and cylinder combo that god or man has ever seen. Furthermore, you want to add some sort of shock absorbing devise INSIDE your engine block to dampen side...
  5. lucky-guesser

    What do all the useless engineering graduates do for work?

    Lol, I see that I’m living rent free in your head since you keep replying to me even though I quit watching this thread. And stalking my profile apparently. I like how you keep giving reasons why you don’t predict success for me, while I have a good career and you’re the one begging for help...
  6. lucky-guesser

    Question about building a steel dolly

    Assuming you have the vertical space to do so, get your 1x2 bracing tubes such that the 2" face is vertical, that will give you the most strength the resist flexing. Your 10ga plate with 250+ lbs in the center would certainly be prone to bowing on its own, so your tubes will be what prevents...
  7. lucky-guesser

    Need Advice for Commercial Site with Semi Trucks

    Maybe I missed something, but is there a reason (elevation change, water routing) that you need to build up the gravel area with 18" of material? Bring in a few tons of gravel or 1/2" crushed concrete, just enough to give yourself a couple inch layer, and call it a day. You have to add some...
  8. lucky-guesser

    What do all the useless engineering graduates do for work?

    I've been underqualified for my last 3 jobs, either in terms of degreed credentials or general work experience. That said, with good personnel skills and a willingness to learn, I've been able to get the job and keep working my way up the ladder each time. No one else here has an attitude or is...
  9. lucky-guesser

    Welding Symbols

    In my experience, welders don't really like being told how to weld anyway so I wouldn't get too caught up in the symbols. I would just use a note pointing to it to the effect of make sure this gets welded, and any notes about bead size needing to be minimal or grind flush if mating up with...
  10. lucky-guesser

    Industrial Pump Incident

    What is "just after"? Some sort of blockage could disturb fluid flow and cause something similar. What comes to my mind as worst case, is if your vapors are from boiling off fluid, but that heat would have to be from a bearing failure at the bottom of the column. Which brings me back to my...
  11. lucky-guesser

    Two-slider crank mechanism

    My understanding is the point of making this is that you can achieve higher crank RPMs as you are getting an additional crank rotation per piston stroke cycle. Presumably, you are trying to do this because engines fail when pushed to high RPMs. Lets say you can get a piston moving up and down...
  12. lucky-guesser

    Impact Force at Vehicle Crash

    F = M x A Beyond that, things get really complicated, really fast. Others may chime in, but whatever discussion is had it will be hard to take many numbers away from it.
  13. lucky-guesser

    Two-slider crank mechanism

    One full revolution of the crank shaft per stroke of the slider, I got that part, but again WHY do I care about this slider? Engines that can rev very high have very LOW reciprocating mass. So again, why is ADDING mass with this slider going to help me spin the engine faster? Not just "because...
  14. lucky-guesser

    General tolerance for angular dimension

    1) I have always seen angular tolerance called out separately from the linear/diameter/radius ones. +/-2 typically in my experience, but I'm sure that varies widely by industry. 2) At least the way your chart is written now, it is directly tied to SIZE (mm) of a dimension, so not applicable to...
  15. lucky-guesser

    Two-slider crank mechanism

    Granted I skimmed a bit, but I never saw any mention of how this is actually supposed to improve power outputs or fuel economy. How exactly is increasing reciprocating mass and adding sliding friction losses supposed to gain you anything? Especially enough to offset the added cost and...
  16. lucky-guesser

    Should I be worried about wheel load ratings?

    Because he has posted this exact same thing before. https://www.eng-tips.com/threads/wheel-load-ratings-and-compatibility-when-considering-non-stock-wheels.522090/
  17. lucky-guesser

    Tesla Cybercab reveal

    LA, one of the largest cities in the country. Yes, they had and have mass transit, because large cities can do those things. My point being that 71% of the US in nothing like LA. I'm not saying you are a liar as I have no idea where in the world you are, but where I am I have never heard of...
  18. lucky-guesser

    Tesla Cybercab reveal

    Think of the cost per person of a train. In large urban areas, you have many people to move a relatively short distance, aka a large customer base to justify the cost of putting in that train. In the US, that is only about 30% of people. 50% are in the suburbs or exurban, which we all know how...
  19. lucky-guesser

    What 3D printer …

    Prusia Mk4, Ender 3 both relatively affordable machines with cheap materials. I see them a lot on the hobbyist market. In my experience there is no printer that just *works*, you will have a lot of testing early on and they can always be finicky for seemingly no reason. Even the industrial...
  20. lucky-guesser

    What would be the most likely cause of nut thread stripping?

    Agreed. If the threads have particularly loose tolerances then you may get lucky and have some residue left for a second run, but I would only do that if the coating isn't critical. Tight threads going on a critical (in this case anti-galling) coating, I would 100% reapply each time. You may...

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