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From: Snag <Snag_one@msn.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: SNAG: Re: Got 4Ah, not 5Ah, battery 18V (20V) - done right thing?
Date: Sun, 19 May 2024 19:09:15 -0500
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On 5/19/2024 6:40 PM, Bob La Londe wrote:
> On 5/19/2024 4:29 PM, Bob La Londe wrote:
>> On 5/19/2024 4:17 PM, Jim Wilkins wrote:
>>> "Bob La Londe"  wrote in message news:v2djrv$3hfus$1@dont-email.me...
>>>
>>> On 5/18/2024 7:33 PM, Jim Wilkins wrote:
>>> ...
>>>
>>> I never was employed doing destructive testing, but I did spend a decade
>>> or two doing low voltage communication contracting.  I learned there is
>>> what they say, and there is what there is.  Usually what they say fell
>>> short in my field, but sometimes it didn't.
>>>
>>> When they say an IR motion sensor will detect motion at 90 feet they
>>> mean if ambient is below 70F and the subject is large and is running a
>>> fever.  LOL.  They don't say if ambient is 90+ its virtually worthless.
>>>
>>> ---------------------
>>> Most of the testing was to find and reject or reclassify parts that 
>>> didn't meet specifications for companies that cared, or burn-in 
>>> testing to weed out early failures by operating at elevated 
>>> temperature for a week. The exact conditions were usually secret, I 
>>> had to provide a range of adjustment. Sometimes there had to be 
>>> provision for destructive failure, such as Chrysler Lean Burn engine 
>>> controllers with components not rated for possible under-hood 
>>> temperatures.
>>>
>>> Before Congress mandated emissions and fuel economy standards that 
>>> needed electronic control to meet, the only electronic device in a 
>>> car was the radio which the auto makers bought, they had to hire new 
>>> engineers unfamiliar with the heat, water, dirt, salt and vibration, 
>>> who took time to learn. I had the partial advantages of military 
>>> electronic experience which solves those, in commercially 
>>> unaffordable ways, plus a hands-on apprenticeship in custom 
>>> electro-mechanical machine design. The engine compartment environment 
>>> can be nearly as challenging as military aircraft specs, consider a 
>>> snow plow driver in Alaska starting cold and diving full throttle 
>>> into the deep snow in front of the truck, or splashing through an icy 
>>> puddle.
>>>
>>> Heat in the South is another issue that's not so evident in Michigan. 
>>> I know what Atlanta is like in summer.
>>>
>>
>>
>> Bell Labs had material test sites down here in the Sonoran Desert for 
>> environmental testing.  Death Valley may be the only place in North 
>> America more hostile than the low Sonoran Desert.  They had panels 
>> setup with material samples affixed out along the southern rail line 
>> right of way.  Maybe they still do (if they are still some form of 
>> Bell Labs).  I haven't checked in a long time.
>>
>>
>>
> 
> Yes I used to ride year around in it too.
> 

   It's only the last couple of years I haven't ridden year round . My 
wife says I'm gettin' old , but I don't believe her . It's just that I 
have so much here to keep me busy ... and well , wrasslin' an 800 lb 
touring bike around the yard to where it's parked isn't as much fun as 
it used to be . The planned gravel work may change that .
-- 
Snag
  "They may take our lives but
they'll never take our freedom."
  William Wallace