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October 2013

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From:
Mike Fenner <[log in to unmask]>
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Date:
Sun, 6 Oct 2013 09:59:45 +0100
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I always understood the reason the Apollo computer power was so limited was
because mostly it didn't fly but stayed on the ground, which makes lot of
sense when you think how big computers used to be..... all processing for
trajectory etc was done earth side as ballistics was one of the main drivers
for computers, and the radars position plotting were there too. That would
have been standard stuff by then. 
Though I don't know, it's probable that a lot if not all of the Apollo
sensing stuff was analogue not digital. Information was sent back and each
stream monitored individually by Humans, Wasn't one of the novelties of the
shuttle was that its computers flew? 
It's difficult to remember now how simple/small electronics was then
compared to now, back then we were mostly using 19th century
physics/mechanics principals with then modern manufacturing. 



Regards 
 
Mike 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Patrick Goodyear
Sent: Sunday, October 06, 2013 4:22 AM
To: [log in to unmask]
Subject: Re: [TN] NTC for today

That and each station had multiple backups plus there one a cross link 
at each station to transmit data forward to the next station and receive 
from the previous station.    Or that at least is what I remember.   In 
ET school in 1972 we had computer that amounted to several transistor 
and/or/nand/nor gates and J/K flip flops, and counter registers.    We 
learned to program it with simple commands and used it to drive a 
servo-syncro set.

pat


On Sat, Oct 5, 2013 at 6:07 PM, Steven Creswick wrote:

> Did each station monitor a different set/piece of telemetry?
>
>
> My HP calculators likely had as much processing ability as the LEM 
> computer.
> Weren't they still using core memory as well?
>
>
> Steve
>
>
> From: Inge Hernefjord [mailto:[log in to unmask]] Sent: Saturday, 
> October 05, 2013 5:13 PM
> To: TechNet E-Mail Forum; Steven Creswick
> Subject: Re: [TN] NTC for today
>
>
> I'm afraid it's not a space plane but just a plan.
> Actually, there is something I always wonder about. Go back to Neil 
> Amstrong
> and that time...Apollo, for instance. The computers at that time were
> simple, compared to today's machines. I know, because I passed a glass 
> box
> every day before I entered the clean rooms. In that box was Apollo's 
> main
> computer, which we built. Lot's of transistors, most TO-18 and TO-5. 
> Specked
> with 2N1893, 2121, 2902, which were very popular. Back to the 
> path.....as I
> said, very simple stuff. The main functions were 'small push/pull 
> rockets
> and main rockets, as long as the service module and the astronaut 
> capsule
> were together. And communication radios. And sensors of various 
> nature...but
> in alles rather uncomplicated electronics. My question: The central 
> station
> in Houston was a large room with lots and lots of work stations. A 
> hundred
> persons "worked" there, all with their noses close to the many large
> computer displays.Why was it necessary with  such many work stations?
>
> Inge
>
> On 5 October 2013 20:13, Steven Creswick <[log in to unmask]> 
> wrote:
>
> Hey,
>
>
>
> I read somewhere that Sweden is making a spaceplane.  How about a ride 
> on
> that, and play the Blue Danube?!!!
>
>
>
> Have a good time cruising!
>
>
>
> steve
>
>
>
> From: Inge Hernefjord [mailto:[log in to unmask]]
> Sent: Saturday, October 05, 2013 1:17 PM
> To: TechNet E-Mail Forum; Steven Creswick
>
> Subject: Re: [TN] NTC for today
>
>
>
>
> Thank you,  buddy,
> take care ya'self.
>
> Inge
>
>
>
> On 5 October 2013 02:43, Steven Creswick <[log in to unmask]> 
> wrote:
>
> It's probably already tomorrow there, but happy belated birthday Inge!
>
> Steve
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski
> Sent: Friday, October 04, 2013 3:32 PM
> To: [log in to unmask]
> Subject: [TN] NTC for today
>
> It's Ingemar Hernefjord's  birthday today!
>
> Happy Birthday, Inge!
>
> Ed Popielarski
> Engineering Manager
>
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