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Recent content by red92s

  1. red92s

    Basic hydraulic piston/rod seal design

    Thanks. I figured that was a viable/probable solution, I just didn't know if there was anything designed specifically for that type of application. The Parker hydraulic/pneumatic handbook is 400+ pages of seals, and that interface isn't even mentioned.
  2. red92s

    Basic hydraulic piston/rod seal design

    Hi All, While I've got a bit of experience incorporating standard o-rings and grooves into designs for low-pressure plumbing equipment, I've recently been thrust into a bit of fluid power stuff as well. I'm struggling to find information about best practices for creating a robust and...
  3. red92s

    Railroad Bicycle

    here is a summary of railroad tresspass laws in every state published by the FRA (Federal Railroad Administration), though it may be out of date. Things have goten worse post-9/11. Every train has a radio, and every railroad maintains it's own police force...
  4. red92s

    Railroad Bicycle

    Bit more information on railbiking below. Guy even sells wheels and plans for building pedal or motor powered carts: http://www.railriders.net/railbiking.html
  5. red92s

    Welding tolerance for DOM tubing through plate?

    They can be, but doing both ends manually on the 100 or so pieces of tube needed for a production run isn't real appetizing.
  6. red92s

    Railroad Bicycle

    If you want a rail-capable bike because you can (maybe) go places a normal bike can't, that's one thing. But it sounds more like you are just trying to make a more efficient bike. What's the point of eliminating the rolling resistance in search of efficiency, only to add additional...
  7. red92s

    Welding tolerance for DOM tubing through plate?

    Typical OD tolerance on DOM is ~+.005" for 1.25" OD, and ~+.007" for 2.5" OD. Not sure about the tolerance on the laser cut diameters, but I will inquire with the supplier. Chamfers on the tube ends can be done on parts that are made on the lathe, but some are "dumb" tubes saw-cut to length...
  8. red92s

    Railroad Bicycle

    Here is a pretty high level explanation of how rail wheels steer: http://www.youtube.com/watch?v=y7h4OtFDnYE
  9. red92s

    Welding tolerance for DOM tubing through plate?

    I've begun a new role designing some weldments (new to me) and hoping to get a bit of input regarding how best to design them for fit-up and welding. We frequently have DOM tubing "piercing" through a flat steel plate. The tubing is typically 1.25"-2.5" OD, and the plate is typically .375"-.5"...
  10. red92s

    Railroad Bicycle

    I work in an very closely related field (although I've only been at it a couple months), and also have a cycling background. Some considerations: 1) First and foremost, where will you ride it? Railroads don't take kindly to trespassing on their right-of-ways. Hard to go on a 60 mile...
  11. red92s

    Bringing samples of work to an interview?

    Brought a couple samples of commercially available work and described my contributions during various project phases. I think the impact was good and the audience was appropriate. Seems to have been well received as I've been asked to come back.
  12. red92s

    Bringing samples of work to an interview?

    Thanks for the quick feedback. I think you've echoed what I was already assuming about it being a good idea to read the situation, pace, and background of the person I'm speaking with. Being relativity early-career I wanted to make sure I wasn't going to be breaching some code of interview...
  13. red92s

    Bringing samples of work to an interview?

    I have an upcoming interview for a product engineering role. I'm currently in a similar role (but an unrelated industry). My skillset and experience level (~5 years) are well aligned with their requirements. From an earlier phone interview it sounds like a good fit both personally, and...
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