22 Jan
2004
22 Jan
'04
11:58 a.m.
----- Original Message -----
From: "John Lawson" <jpl15(a)panix.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)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