[TowerTalk] mast stacking calculation

[jimlux]

Peter Voelpel wrote:
>  
> 
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of K7LXC at aol.com
> Sent: Mittwoch, 21. Januar 2009 18:58
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] mast stacking calculation
> 
>  
> In a message dated 1/21/2009 9:02:18 A.M. Pacific Standard Time,
> towertalk-request at contesting.com writes:
> 
>>>      You are referring to the MARC  (Mast, Antenna and  Rotator 
>>> Calculator)
> Program available from  Champion Radio Products. It's $10  and can be
> emailed to you.  
> 
>>>  Cheers,
> Steve        K7LXC
> _www.championradio.com_ (http://www.championradio.com)
> Cell:  206-890-4188
> 
>>  Is that program working with si-units to be  useful outside the USA? 
> 
> 
> 
> Since I don't know what  si-units are, I'd have to say no. There are many
> conversion programs on the  internet so you should be able to use it by
> converting them. 

SI = Systeme International  aka Metric

>  
> Cheers,
> Steve     K7LXC
> Champion Radio Products
>  
>  
>  
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> 
> Hi Steve,
> 
> For your information: http://physics.nist.gov/cuu/Units/
> 
> If I remember right NASA already had a space flight problem in the past by
> wrong converted units


Ahem.. (as a JPLer).. NASA has used Metric (SI) units for decades, at 
least in deep space exploration.  US manufacturers do not always do so. 
In the Mars Climate Orbiter fiasco, the interface control document (ICD) 
for data from Lockheed said metric, the JPL navigators assumed the data 
was metric (Newtons for thrust), but Lockheed was putting the data in as 
pounds, so it's off by a factor of 4.5 or thereabouts.

Lockheed screwed up by not giving the data in the specified form.
JPL screwed up by not checking and assuming that Lockheed did what they 
said they were going to do.




> 
> 73
> Peter
> 
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