[GreenKeys] AP Model 15 longevity

[Roy Morgan]

At 03:17 PM 9/24/2007, jhhaynes at earthlink.net wrote:
...  The M15 was quite problematic
>for shipboard use - consider the mass of that type basket assembly
>being flung around on a ship that is pitching and rolling.

There were times, I'm sure, when the radioman at the keyboard would grab 
the machine to keep from sliding across the deck in heavy seas.

>...And I remember some technique that involved making models of
>parts from clear plastic, which would do something when lighted
>appropriately, and there would be colored bands showing where stress
>was concentrated.

Polarized light will show stresses in Plexiglass (or some other similar 
plastic).

Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
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