[ARC5] BC-454-B Dymamotor Question

Jay Coward jcoward5452 at aol.com
Sat Jan 19 17:30:26 EST 2013 

The "rolling" smog reqirement date in CA stopped some years ago.
 Jay
 



-----Original Message-----
From: Bob Macklin <macklinbob at msn.com>
To: jfor <jfor at quikus.com>; Mike Hanz <aaf-radio-1 at aafradio.org>
Cc: arc5 <arc5 at mailman.qth.net>
Sent: Sat, Jan 19, 2013 10:30 am
Subject: Re: [ARC5] BC-454-B Dymamotor Question


In Washington and California they have a 25 year rule. You can do anything 
ou want to a car over 25 years old.
In my area we have several ORIGINAL hot rods some with flathead Ford 
ngines. They have no smog equipment and no inspection is required.
Bob Macklin
5MYJ
eattle, Wa.
Real Radios Glow In The Dark"
---- Original Message ----- 
rom: "J. Forster" <jfor at quikus.com>
o: "Mike Hanz" <aaf-radio-1 at aafradio.org>
c: <arc5 at mailman.qth.net>
ent: Saturday, January 19, 2013 10:21 AM
ubject: Re: [ARC5] BC-454-B Dymamotor Question

 One reason for kids not working on cars anymore is the heavy boot of
 government. You cannot get plates without safety inspections and emissions
 checks, and if you modify anything, you will likely fail those tests.

 Even lawn mowers are regulated, so go-carts may be illegal in some places.

 So, government regulations have essentially stopped any experimentation or
 innovation.

 Lack of any hands-on skills is just collateral damage.

 YMMV,

 -John

 =====================



> I have to agree with John on this. Reference the dynamotors, the manuals
> are full of notes like the need to maintain surgical cleanliness of
> bearings, not spinning them with compressed air, and using a sleeve and
> solid support to press on new bearings, just as examples.  It's not
> rocket science.  The fit used with all the dynamotors I've worked on is
> considered an HN 1 "light drive fit" in the interference fit grades
> listed in Machinery's Handbook, so it doesn't take a big hydraulic press
> if the shaft is clean and polished.  I use the old WWII arbor press
> shown at http://aafradio.org/garajmahal/arbor_press.htm and it presses
> the bearings on without any real effort at all - just a bit of care. The
> training textbooks are surprisingly comprehensive in theory, unlike the
> ones in use now that are simply gigantic flowsheets that doesn't take a
> lot of training or functional knowledge to follow...this from my son, a
> former ET on boomers.
>
> My father was a budget guy for the AFSWP (later DASA) in Albuquerque
> after the war, but he worked on his own car (replaced all the pistons
> and crankshaft at least twice while I was growing up), repaired just
> about anything in the house, and was a whiz at cobbling together
> something to make a recalcitrant device useful again.  Most of his
> friends were that way as well.  Popular Science and Popular Mechanics
> were full of building projects for father and son that involve mangling
> wood or metal.  Maybe it was the Great Depression that made them that
> way...  I'm having a hard time finding any kids today that have that
> kind of "get your hands dirty" interest.
>
>   - Mike
>
> On 1/19/2013 12:20 PM, J. Forster wrote:
>> I wouldn't bet on that assumption.
>>
>> In the 1920s and 1930s, Americans were not infected with afluenza. Also,
>> technology was a lot simpler, and much more repairable.
>>
>> When a radio or toaster or table lamp broke, they fixed it or had it
>> fixed. Also, many more grew up on farms, where machinery had to be
>> repaired. Kids bought old cars, like Model Ts and As.
>>
>> The point is that skills to fix machinery were far more widespread than
>> today.
>>
>> If your latest iToy breaks, it instantly becomes iPoo. If your car stops
>> running, do you have any idea how to fix it, other than filling the gas
>> tank? Can you even gat a wiring diagram or the 'puter diagnostic codes.
>>
>> Anyone who can strip and fix an engine, could probaly be trained in a
>> few
>> weeks to reliably refurbish dynos.
>>
>> Also, there were plenty of radio repair shops in civilian life pre-war.
>> I'm certain some of those guys went into the services. Fixing a table
>> radio was not very different than an ARC-5 receiver.
>>
>> There are pretty comprehensive TMs from the era on most things
>> electronic.
>> They would certainly give any reasonably intelligent person a fair
>> grounding in the theory. You don't need to be a design engineer to
>> understand most circuits. Analysis is far easier than synthesis.
>>
>> YMMV,
>>
>> -John
>>
>> ===================
>>
>>
>>
>>> I would have assumed most of the "techs" were none too savvy in that
>>> era.
>>> Ball bearings in general would have been quite novel in those days, and
>>> even
>>> now, most people don't know how to handle, install, clean, lubricate,
>>> or
>>> pre-load them properly.  Radio specialists during the great war were
>>> processed through signal corps school in a not too effective fashion,
>>> and
>>> even if they did retain most of what they were taught, they had
>>> precious
>>> little experience when they hit their duty station, and not too much
>>> time
>>> to
>>> hone those skill afterward.  They probably did the best they could by
>>> swapping parts.  I would assume the "tough dog" problems were relegated
>>> to
>>> the junk pile.  The great logistics monster that was created during
>>> WWII
>>> eventually made deep troubleshooting and repair unnecessary (Witness
>>> the
>>> huge amount of surplus now in our hands that causes us to ponder these
>>> things now, some seventy years on.
>>>
>>>
>>> Scott W7SVJ
>>>
>>> -----Original Message-----
>>> From: arc5-bounces at mailman.qth.net
>>> [mailto:arc5-bounces at mailman.qth.net]
>>> On
>>> Behalf Of Kenneth G. Gordon
>>> Sent: Friday, January 18, 2013 5:33 PM
>>> To: ARC5 at mailman.qth.net
>>> Subject: Re: [ARC5] BC-454-B Dymamotor Question
>>>
>>> On 18 Jan 2013 at 16:22, WA5CAB at cs.com wrote:
>>>
>>>> Probably because the field installation of the bearings was done with
>>>> a hammer and something like a 1/2" socket.  And they bent the outer
>>>> shield and/or brinnelled the races.
>>> Well, I had thought of that too, but I figured that not every radio
>>> tech
>>> in
>>> those days was a dolt. ;-)
>>>
>>> Ken W7EKB
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>>
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>
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