Olympus-OM
[Top] [All Lists]

Re: [OM] Mammoth E-30 Product Review - Zone-10 Website

Subject: Re: [OM] Mammoth E-30 Product Review - Zone-10 Website
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 11 Mar 2009 10:06:03 -0400
B-58s also make excellent alarm clocks if, as I did in the mid-60's, you 
live under the flight path of Kelly AFB.  :-)

Chuck Norcutt

Paul Laughlin wrote:
> The inertial guidance systems do not guess at all.  Even the system in the 
> B-58, which, incidentally was analog, used an astrotracker to determine 
> position on earth.  I am sure that, today, they use GPS.  There was also 
> input from a fluxgate compass so that the platform had a north reference. 
> The gyro-stabilized table is erected to be gravitationally level and 
> pointing to North.  At this point there is zero static (gravitational) 
> acceleration.  Now the gyroscopes maintain the platform at this position. 
> The aircraft rotates about it.  Any movement of the aircraft then effects 
> the accelerometers.  There are correction factors that are necessary such as 
> coriolis effect and others, which are taken into consideration, of course. 
> You can get aircraft pitch, roll and azimuth position by checking the 
> aircraft attitude in reference to that stable platform.
> The B-58 system was pretty much a pioneer in Inertial Guidance for aircraft. 
> My primary responsibility was the in shop maintenance of the 
> gyro-stabilization and astrotracker systems.  Troubleshooting and repair. 
> That was in the B-58 Test Force and later in the 43rd Bomb Wing.  As a 
> completely useless piece of info, the B-58  was a maintenance man's 
> nightmare.  Required something like 1000 hours of maintenance to get 1 hour 
> of flying time.  It did set several speed records, though.  Won the Bleriot 
> Trophy, and then while flying to the Paris Air Show to receive it, set a 
> speed record from New York to Paris.  Still stands, as far as I know.
> The Inertial Guidance systems are very much more sophisticated these days, 
> but the principles are pretty much the same.
> Paul in Portland OR
> 
> 
> ----- Original Message ----- 
> From: "Chris Barker" <ftog@xxxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Monday, March 09, 2009 11:40 PM
> Subject: Re: [OM] Mammoth E-30 Product Review - Zone-10 Website
> 
> 
>> That sounds reasonable, thanks, Mark.  All IN systems have to guess at
>> their position on the earth before being aligned.  They need this to
>> know what the angular acceleration should be so as to erect the
>> platform level.  Presumably the local gravitational force is part of
>> the erection and alighnment process.
>>
-- 
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz