[ARC5] BC-454-B Dymamotor Question

J. Forster jfor at quikus.com
Sat Jan 19 13:38:04 EST 2013 

I doubt they have exempted the safety standards and I doubt that many kids
could affort a 25 year old hotrod, unless Bill Gates is their daddy,
judging from what they sell for.

In the northeast, cars are rust buckets long before 25 years.

-John

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


> In Washington and California they have a 25 year rule. You can do
anything you want to a car over 25 years old.
>
> In my area we have several ORIGINAL hot rods some with flathead Ford
> engines. They have no smog equipment and no inspection is required.
>
> Bob Macklin
> K5MYJ
> Seattle, Wa.
> "Real Radios Glow In The Dark"
> ----- Original Message -----
> From: "J. Forster" <jfor at quikus.com>
> To: "Mike Hanz" <aaf-radio-1 at aafradio.org>
> Cc: <arc5 at mailman.qth.net>
> Sent: Saturday, January 19, 2013 10:21 AM
> Subject: 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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