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Type: Posts; User: Hudson

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    Rothbart's is probably the best book on cam...

    Rothbart's is probably the best book on cam design. On page 64 of the original 1956 edition he wrote, “Generally the safe limiting pressure angle in practice is 30 degrees.” You are of course free...
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    You will have obtained complete mastery of HCCI...

    You will have obtained complete mastery of HCCI if you can start a cold engine in that mode.

    Can you point to one HCCI engine that does not need a spark plug to start and warm up before HCCI is...
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    38 degrees is greater than the usual 30 pressure...

    38 degrees is greater than the usual 30 pressure angle threshold so expect problems with the piston tilting and jamming in the rectangular slot.


    Sealing is going to be big problem. It is...
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    There are half journal bearings in engines. They...

    There are half journal bearings in engines. They are confined to two stroke rods as far as I know. See the early Napier Nomad that had two rods on the same crankpin held together with a pair of...
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    I'd use the inside edge of the 'heel' in your...

    I'd use the inside edge of the 'heel' in your sketch as the point where the moments would be calculated. Force x horizontal distance to that point being equal to the bolt force x bolt centerline to...
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    Search for a thread titled "Simple Airlift Pump...

    Search for a thread titled "Simple Airlift Pump Equations?? "

    and see my answer.
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    I don't know who said it first but, Nothing ruins...

    I don't know who said it first but, Nothing ruins a good idea like a scale drawing.
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    Data taken from: Ameriti

    Data taken from: Ameriti
  9. search: "soil pressure"

    search: "soil pressure"
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    You have specified the functional dimension that...

    You have specified the functional dimension that you want. Looks fine to me.
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    I'm just speculating, by looking at the worm,...

    I'm just speculating, by looking at the worm, that the interference may have been caused by the worm not being extended far enough along the length of the shaft. The type of worm and worm wheel that...
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    Thermoset plastics are typically formed by...

    Thermoset plastics are typically formed by compression molding at temperature.

    If you are interested in a high temperature plastic that you can machine for prototypes, look at Dupont Vespel which...
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    Have you considered thermoset plastics?

    Have you considered thermoset plastics?
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    How hot does the part get? Can it be a burly...

    How hot does the part get? Can it be a burly engineered plastic?
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    Have you thought about a thread insert?

    Have you thought about a thread insert?
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    most threads are actually rolled. The threaded...

    most threads are actually rolled. The threaded section was probably about pitch diameter when the part was headed and then the threads rolled on that section. You are right about most being...
  17. Your 304 material appears to have be formed to...

    Your 304 material appears to have be formed to create the flange. The forming stresses and work hardening are not something that can be known to the forum viewers. Was the material annealed after...
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    Many threading dies have a gap that allows the...

    Many threading dies have a gap that allows the die to be closed a bit by the set screws that hold it into the die holder. Does your die holder allow this adjustment?
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    Span? 16' is about max span for a 2x10 check...

    Span? 16' is about max span for a 2x10 check the tables and the grade stamp on your joists. Some codes allow floor sheathing which is pretty thin and the deflection will vary with the cube of the...
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    I'm voting for taper lock split bushings and...

    I'm voting for taper lock split bushings and matching hub. You may not need the key depending upon the torque applied. They hold really well.
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    The indexer jboggs mentions is a good idea. Also...

    The indexer jboggs mentions is a good idea. Also investigate shot pins to position. The name Ferguson drive comes to mind as well.
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    Why do they have to be on a turn table? Or why...

    Why do they have to be on a turn table? Or why can't they be moved in a straight line? How accurate do they have to be for measurement?
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    likely done as a stamping.

    likely done as a stamping.
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    Did you look at drawn over mandrel tubing?...

    Did you look at drawn over mandrel tubing? (D.O.M.)
  25. Your rotary engine becomes a stationary engine. ...

    Your rotary engine becomes a stationary engine. The rotor must rotate to maintain the tips of the rotor in contact with the case as it the eccentric moves on the output shaft. The gears maintain...
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