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Mechanical Engineering

Timothy L Dennison

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Timothy L Dennison last won the day on September 23 2020

Timothy L Dennison had the most liked content!


About Timothy L Dennison

  • Birthday 06/27/1965

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  • Interests
    Military vehicles, heavy metal music, walking machines, metal fabrication and computers
  • Present Company
    Grubhub / uber eats
  • Designation / Job Title
  • Engineering Qualification

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  • Yahoo

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  • Project Undertaken
    Walking machine
    Small hand powered lifting grapple
    Small VTOL aircraft
    2 inch strap winder
    Sand bag filling machine

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  1. Its better, but not far enough, its not balanced. I think you should try to make it equal distance from the center line, if possible. I dont know what limitations you are under. You could incorporate a few 45° angle braces giving it strength. From my experience in construction, you can make a wall stand in high winds with a couple 45° braces attached from the highest point possible to the floor. Very stable if you give it a wide footprint. If its not possible to add that much structure, then adding heavy weights on top of yhe feet to hold it down is an alternative
  2. It doesnt look stable to me. You need another leg going in the other direction, at least
  3. Still need to make a lot of adjustments and redesigns, but i think i am going in the right direction. I made it the width of standard gauge railroad tracks. Skipped making it variable " length of gait " for now Lowquality7_19.mp4
  4. Dear DrD, thank you. I have used woodstoves for a number of years. When they got too hot, of course you choke off the air, and the fire dies. When i got a coal stove, that didnt work any more. The stove got bright red hot, and i tried everything to cool it down, water worked temporarily. But the most effective method was smothering it with ash. It prevented air flow, and couldnt evaporate like water does. Its cheap and light, and can be recycled from one fire to the next. I still wish to pursue this some day
  5. Was this an advertisement for Solidworks or Hitech CADD Services. It seems to promote those two companies, and no others.
  6. Everything is so expensive. And too many features when all I want is the most basic programming to design simple linkages, in motion.
  7. My apologies. I understand that would be impossible.
  8. If a picture is worth a thousand words, a video could be worth a thousand pictures. This should be presented in video format
  9. For army tanks that use a Caterpillar track system you have a complex engine/transmission/suspension/endless track that is 95% commonality to wheeled vehicles. Early tanks could even remove the tracks and drive on their wheels. I have been dreaming of a system of actuators that roll a sine wave through a belt in exactly the same way a caterpillar moves. The part I cant figure out is where to attach the linkages to the frame
  10. I think it's impossible to convert constant RPM motion to constant velocity reciprocation. The only one I know that does have straight line constant velocity, a quarter of the cycle is way out of line. Chebyshev's lambda mechanism. I am confident you are not looking for that
  11. For any regular people who are not mechanical engineers, not even students, I have found an awesome free CAD program that anyone can learn to use in an hour or less, vs other programs that take dozens of hours of training just to start. https://www.rs-online.com/designspark/mechanical-software I have only made a few parts myself. But it's an amazing, powerful program for designing anything. I don't know of any faults yet. Am currently trying to import these files to Autodesk inventor to make an assembly.
  12. I have not seen anyone try to develop a cheap digging machine. I started making one myself, am halfway to trying it. But the geometry is wrong, I don't have enough leverage for the pincer movement.
  13. I need ideas for an ultra light rail system, how best to switch tracks. Existing switches are not acceptable, they require mechanical movement in the track. The switching should be done from the rail car itself.
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