From: "Suhas Gurjar" 
To: "ATM Archives" 
Reply-To: "Suhas Gurjar" 


Besides discussions about how the numbers are displayed in the world, here
is a mail appeared today only where numbering is done in some different way
(of using brackets or full points or just the space). No comments- may be
of interest to some of you. Thanks
Suhas

----- Original Message -----
From: "Marco Miglionico" 
To: "ATM Archives" 
Sent: Thursday, June 19, 2003 1:18 AM Subject: ATM Mirror fans.


>
> I've had three ideas that may or may not have been tried.
> I am speaking with regards to the newer technique of blowing
> air across the face of the mirror. (S&T: 'thermal managment in newtonian
> telescopes'.
>
> 1/ Have an extra fan at the other side of the mirror sucking from the
>    tube.( whilst the normal fan opposite is blowing). My thinking here is
> that
>   the flow across the mirror would be less turbulent due to the push pull
> action as opposed to just hoping that the air exits uniformly from holes
in
> the other side. The fans should be evenly matched for uniform air flow.
>
> 2/ Has anyone tried blowing air across the face of the secondary mirror to
> gain the same effect as the primary mirror?
>     Or would this cause too much in the way of tube currents.
>
> 3/What about a filter near the fans to stop dust blowing on the mirror?
>
> Marco Miglionico
>
> www.geocities.com/telescopiman
>
>
>
>
>

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