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    Re: Manufacture new Bygraves?
    From: Geoffrey Kolbe
    Date: 2009 Jul 09, 20:32 +0100

    Brad Morris wrote (NavList 9047)
    >I would dearly loved to have extended the resolution and scale
    >lengths, added in those second scales alluded to in the Bygrave
    >patent and etcetera, but I believe the consensus now to be 'copies
    >of the MHR-1'.  Note that this is NOT a copy of Bygraves original
    >manufacture.  That device suffers from the in-ability to lock the
    >reference of the tubes to each other.  Why promulgate that design,
    >when the subsequent MHR-1 was clearly superior in manipulation.
    Geoffrey responds:
    As Gary says, if there is sufficient friction between the tubes there
    is no need for a device to lock the tubes. That being the case, I am
    not so sure that having such a locking device is "clearly" superior -
    but what it does do is complicate the design hugely. It is a
    typically German over-engineered response to a rather trivial
    problem. Lest this be taken the wrong way, I am not trying to
    denigrate the Germans or German engineering here. Far from it, I have
    great admiration for the quality and inventiveness of German
    engineering. But there is a tendency in German engineering culture
    toward engineering for the sake of engineering rather than to solve
    problems as easily and efficiently as possible. In this case, adding
    a bit of friction between the tubes is clearly easier than
    incorporating a locking device.
    There is one aspect of the MHR-1 which is clearly (there is that word
    again) superior to the Bygrave, and that is the use of a tube with a
    cursor window instead of that rather delicate little spike which
    decorates the Bygrave.
    Geoffrey Kolbe
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