PSN-L Email List Message
Subject: Re: How much mass ?
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Sat, 16 Feb 2008 14:57:20 +0000
Thanks for this. I have printed out the guide to show the teacher. It is
cheaper for me build it then buy it.=20
On Fri, 2008-02-15 at 14:59 -0500, ChrisAtUpw@....... wrote:
> In a message dated 2008/02/15, jonfr@......... writes:
> > The teacher how is helping me building the seismometer wants to know
> > what type of material is best to use in the seismometer. He was
> > wondering about iron or steel, maybe aluminum. But as I am not sure
> > so I
> > was unable to give him good answer. He was also wondering about the
> > arm
> > that holds them mass up, what it should me made out of.
> > I am going to use the BGS design, as it has the configuration
> > numbers
> > that the teacher needs to build the seismometer.
> Hi Jon,
> I suggest that you download and read
> The original version used 2.5" or 3" x 1" U Channel Aluminum
> for the frame and 1/8" Al plate for the corners. It used 6mm SS
> You can buy 1/8" / 3mm Tungsten Carbide drills and use the
> shanks for the bearings=20
> This should give you some ideas anyway!
> Chris Chapman=20
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