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RE: RE: starship-design: unmanned missions
> -----Original Message-----
> From: firstname.lastname@example.org
> [mailto:email@example.com]On Behalf Of Paul
> Sent: Friday, February 13, 1998 10:36 AM
> To: Steve VanDevender
> Cc: 'LIT Starship Design Group'
> Subject: RE: RE: starship-design: unmanned missions
> On Thu, 12 Feb 1998, Steve VanDevender wrote:
> > It was definitely digital. Analog computers have too many moving
> > parts and aren't going to work well during launch or landing
> > operations.
> Who said analog computers need to have any moving parts? You're thinking
> mechanical computer. AAMOF, analog computers use operational amplifiers
> and different voltages to represent different numbers, i.e. 1-10 volts(it
> starts at 1 instead of zero so that you can go below 0). They used two of
> them at ground control during the early apollo missions for calculating
> trajectory. TTYL!
Moving parts? Unless you are counting slide rules and abacus as analog
computers, I've never seen an analog computer with moving parts. I worked
with analog computers in 1965 or so and they were electronic, not solid
state, but definitely no moving parts.
Long experience has taught me not to believe in the limitations indicated
by purely theoretical considerations. These - as we well know - are based
on insufficient knowledge of all the relevant factors."