Modern Tube computing

From: Geoffrey Thomas <geoffreythomas_at_onetel.net.uk>
Date: Thu Jan 22 11:58:59 2004

----- Original Message -----
From: "John Lawson" <jpl15_at_panix.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk_at_classiccmp.org>
Sent: Wednesday, January 21, 2004 2:22 AM
Subject: Re: Modern Tube computing


>
>
> On Tue, 20 Jan 2004, R. D. Davis wrote:
>
> These devices work on aerodynamic principles - Bernoulli effects - and
> boundary layer physics. For example, the flip/flop module used an internal
> airfoil to guide a stream of incoming air through one of two adjacent
> channels. The device was 'set' or 'reset' with a transverse stream
> impingeing on the incoming 'main' stream, diverting it to the opposite
> channel, where, due to capillary action and the boundary layer laws,

Also utilised the Coanda effect ,where a flow of air will tend to stick to a
surface until disturbed - utilised in a range of room heaters of the same
name over here

Geoff.

> it stayed until it was set to the complement by another "puff" from the
other
> port. Bleed holes, or venturis, were then used to sense the direction of
> flow.
> Cheers
>
> John
>
>
Received on Thu Jan 22 2004 - 11:58:59 GMT