Dave,
That's the point I'm struggling to understand. I'm assuming a chain is
used to suspend the dial in use, but wouldn't it adjust itself to bring
the centre of gravity back under the point of suspension - effectively
making it impossible to rotate the dial face?
Steve
On 01/06/2014 7:36 PM, David Bell wrote:
I don't know the name, but I believe the moveable "attachment point" is where
the hanging loop clamps to the dial plate. Moving that will rotate the dial and altitude
scale relative to vertical.
Dave
Sent from my iPhone
On Jun 1, 2014, at 3:13 PM, Steve Lelievre <steve.lelievre.can...@gmail.com>
wrote:
Hi folks,
http://www.pinterest.com/pin/301178293801331061/
What type of dial is this; I realize it's a form of altitude dial, but is there
a specific name for it?
The accompanying note states that the dial can be adjusted for latitude by moving
"the attachment point". I don't understand which part of the mechanism does
that. Can anyone explain it for me?
Lastly, I'm appreciate references for articles or webpages that discuss these
dials - history and mathematics.
Thanks,
Steve
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