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  1. 2brains

    hydraulic pump and motor system

    The housing of the headstock on this Delta lathe looks to be pretty robust to me and the max torque is when one uses 12"dia pieces of logs and they will be no longer than 11" (what I was using before). Also I could take thinner slices at the beginning and I doubt its really taking as much force...
  2. 2brains

    hydraulic pump and motor system

    I made a mistake: the hydraulic motor I was looking at has a displacement of 12.15 cu in and 12.15/.065=184 which is the ratio I was looking for.
  3. 2brains

    hydraulic pump and motor system

    I didn't include all the details. I am planning to mount this all on a 1/4 sheet of steel welded onto a cage of 1 1/4 square tubular steel underneath rather than use the lathe bed that came with it. I am concerned about the spindle which is almost 1" dia but I found it is hollow. It has several...
  4. 2brains

    hydraulic pump and motor system

    I am building lathe to peel pieces of veneer approx 0.160" off of pieces of logs. I sliced pieces off with an arbor press and with some tweaking was very pleased with the results. I have decided that the max torque needed would be 6000inlb. A 3/4hp motor came with the wood lathe. Until I thought...
  5. 2brains

    elementary thermodynamic question

    Exactly. I didn't want to get into social commentary. Your figures agree with what I hear about many people's utility bills. I have an air conditioner that uses 550 Watts and I have never ran it more than a little over an hour a day. I use it primarily for dehumidifying which it does a very nice...
  6. 2brains

    elementary thermodynamic question

    racookpe, What I originally had in mind was a small reflective solar collector electric generating system which should provide sufficient electric power for a small house that would stand alone away from other objects-not an industrial sized unit. There would still be some hazards to take...
  7. 2brains

    elementary thermodynamic question

    I meant to say kerosene boils at 157 deg C at 1 atmosphere. I think I agree with quark. There is an example problem in my physics book calculating the entropy of changing 1kg of water to steam at 100 degC and it would take 1/2 that for kerosene at its boiling point (some additional energy...
  8. 2brains

    elementary thermodynamic question

    I didn't have a good understanding of what part latent heat played in this process. One could heat water holding the temperature nearly constant until it all turned into steam and then let it expand in a piston engine allowing much of it to come out as wet steam in the exhaust; thus, getting...
  9. 2brains

    elementary thermodynamic question

    Thank you for this answer. Yes, this would be a closed cycle. So, its not as simple as I thought. I think I see what you are saying. I'll need to look into this further. Other than avoiding the corrosiveness of steam there would be little advantage then while inlet and outlet temperature would...
  10. 2brains

    elementary thermodynamic question

    Could someone simply confirm my reasoning that to use a working fluid such kerosene rather than water in a engine like a steam turbine would be a lot more efficient since the latent heat of evaporation of kerosene is less than 1/2 that of water? I would need to travel 45mi to the nearest Univ...
  11. 2brains

    Could you help me??

    This seems fairly simple. The amount of heat lost would need to be dQ= 80cal/gm + 50cal/gm because if I remember water has to lose 80cal at zero C to freeze and lose 1 cal for each gm to lower the temp to zero. Now heat x time or Ht = dQ = kA(T1-T2)/thickness of the pipe and you just figure out...

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