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Thread: Tuner construction?

  1. #16
    Join Date
    Jul 2005
    Posts
    493
    Quote Originally Posted by alinwa View Post
    LOL!

    It's like bangin' yer bean against a boulder, this one. There are a bunch of rabid believers here who feel "weight is everything" with no appreciation for nor thought of configuration. Like "how it's shaped don't matter!" it just needs to be the magic WEIGHT!

    Offsets? "nawwww"

    Diameters? "nawww"

    Weight? Caliber? Discipline? "nawwww"

    Fore? Aft? Below the bore? Above the bore? Abaft the beam?, "nawwwww. totally irrelevant!"

    It's like The Age Old Question.... is the answer to everything 21 3/4? .....Or 42?..... I've learned to just answer "YES!"
    Surrounding the bore is what you want.

    Symmetry really matters in vibration behavior.

    Since the bullet is NOT going to touch the weight most of the other
    things are not all that important.

    One thing that can be important is having the weight be able to
    extend past the muzzle slightly without touching the bullet.


    While tedious to set up, the vibration modelling is NOT all that hard.
    The first generations of SW darn near did require PhD to operate.
    The newer ones are a lot easier.
    Things like 'meshing' that establishes the small volumes for the system
    to model on is reasonable automated.

    You decide on error limits, mesh the structure, then run the simulation and look at the results.
    The next step is often to just halve the size of the cells and run again.
    See if there are major changes.
    If they line up well you probably have a good setup.
    Use the courser mash to speed things up.

    Many of the tools will produce a 'movies' of the vibration, with whatever exaggeration in movement you want to view it.
    Or even color shading on the surface of the object by displacement.

  2. #17
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
    Posts
    10,278
    Quote Originally Posted by brickeyee View Post
    Surrounding the bore is what you want.

    Symmetry really matters in vibration behavior.

    Since the bullet is NOT going to touch the weight most of the other
    things are not all that important.

    One thing that can be important is having the weight be able to
    extend past the muzzle slightly without touching the bullet.


    While tedious to set up, the vibration modelling is NOT all that hard.
    The first generations of SW darn near did require PhD to operate.
    The newer ones are a lot easier.
    Things like 'meshing' that establishes the small volumes for the system
    to model on is reasonable automated.

    You decide on error limits, mesh the structure, then run the simulation and look at the results.
    The next step is often to just halve the size of the cells and run again.
    See if there are major changes.
    If they line up well you probably have a good setup.
    Use the courser mash to speed things up.

    Many of the tools will produce a 'movies' of the vibration, with whatever exaggeration in movement you want to view it.
    Or even color shading on the surface of the object by displacement.
    Here we will disagree.... keenly

    I have many offset tuners, right now all my tuners but one include offset WEIGHTING systems to not only purposely mis-align them, keep them from "surrounding the bore" because....

    bores aren't straight

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