## PSN-L Email List Message

Subject: Re:
From: "Ted Rogers" tedr@...........
Date: Tue, 19 Feb 2008 22:07:20 +1100

```Chris,

Do you thing that purpose could be served if the rod was a modified =
"cotton reel" shape and it rolling on a polished flat plate with a =
slight bow in it ?

Regards

Ted

=20
----- Original Message -----=20
From: ChrisAtUpw@..........
To: psn-l@.................
Sent: Tuesday, February 19, 2008 5:34 PM
Subject: Re:=20

In a message dated 2008/02/19, tedr@........... writes:

You could create the same "rolling" effect by having 2 narrow plates =
a short distance apart on the upper edge of each a shallow curve of =
about 1000' radius. On these you sit a ground and polished rod of, say, =
2" (~50mm). I'm sure this would give the same effect as your cylinder, =
the only problem being of course - the creation of the curves.=20

Hi Ted,

You could probably get this sort of curvature most easily by =
flexing a flat plate? It is approximately 0.75 thou for a 6" long plate!

Part of the problem is having large area contacts. This is most =
easily corrected with either strips of foil or wires.

Regards,

Chris,

Do you thing that purpose could be =
served if the=20
rod was a modified "cotton reel" shape and it rolling on a polished =
flat=20
plate with a slight bow in it ?

Regards

Ted

<tedr@...........>

----- Original Message -----
From:=20
ChrisAtUpw@.......
To: psn-l@..............
Sent: Tuesday, February 19, =
2008 5:34=20
PM
Subject: Re:
In a=20
message dated 2008/02/19, tedr@........... writes:
You could create the same "rolling" effect by having 2 =
narrow=20
plates a short distance apart on the upper edge of each a shallow =
curve of=20
about 1000' radius. On these you sit a ground and polished rod of, =
say, 2"=20
(~50mm). I'm sure this would give the same effect as your cylinder, =
the only=20
problem being of course - the creation of the curves. =
Hi=20
Ted,       You could probably =
get this=20
sort of curvature most easily by flexing a flat plate? It is =
approximately=20
0.75 thou for a 6" long =
plate!      =20
Part of the problem is having large area contacts. This is most easily =

corrected with either strips of foil or=20
wires.      =20
Regards,       Chris =
Chapman=20

```