[AJD] Physics 101

[Terry L. Hrdlicka]

Steve,

I won't even start on the things that happen with these old beasts when 
the weather gets REALLY HOT!

;)

Terry
0605 CST


Steve Bachman wrote:
> terry,
> 
> i laughed my arsh off at your posting...thanks!
> 
> steve
> 
> 
> "Terry L. Hrdlicka" wrote:
> 
>>Cal,
>>
>>Don't know a lot about the physics involved, but here's what I have
>>observed about the old iron/temp/weather relationship:
>>
>>Sunny, calm, 78*, no work to do, just want to putt around the pasture:
>>Fires up in the first 1/100 revolution and purrs like a kitten.  Runs so
>>smooth it would balance on 1 coke bottle.
>>
>>Sunny, calm, 78*, just want to show your buddy how easy it starts after
>>your new tune up:
>>Cranks 'till the battery is almost dead/you can't lift your arms,
>>realize you shut off the gas.  Turn on gas, flood engine, gas soaked new
>>plugs won't fire, replace plugs, finally starts on one cylinder and runs
>>like crap.  Buddy goes home with smirk on his face.
>>
>>Cloudy, windy, 45*, going to cut fire wood in the draw 1 1/2 miles from
>>the house:
>>Fires up in the first 1/100 revolution and purrs like a kitten.  Backs
>>itself up to the trailer, perfectly aligned with the hitch the FIRST
>>time and runs better than it ever did out to the draw.  Shut off
>>tractor, fill trailer with wood.  Start tractor to go home, runs on 1
>>cylinder, barely pulls itself in 1st gear.  Takes forever to get home
>>driving into a 45 MPH wind all the way.
>>
>>Sunny, calm, 20*, just want to see how it starts when it's this cold:
>>Fires up in the first 1/100 revolution and purrs like a kitten.
>>
>>Cloudy, windy, freezing rain, sleet, snow, -5*, pick-up stuck in snow
>>from trying to pull mamas mini van out of a snow drift:
>>Starts reluctantly in machine shed.  Runs O.K. 'till you get hooked up
>>to the pick-up.  Starts to miss and will barely pull itself.  Get pick
>>up unstuck, limp back to machine shed to see what's wrong with tractor.
>>Go in house to have a shot of schnapps and thaw out frozen hands.
>>Listen to mama b!#&h because her mini van is still stuck and she's
>>supposed to pick up "the girls" for basket weaving class in 1/2 hour.
>>Listen to mama b!#&h some more about the time and money you've spent
>>when you tell her the tractor isn't running right.
>>
>>Sunny, calm, 10*, mama's mini van unstuck by neighbor down the road with
>>a RED tractor, go to machine shed to try to figure out why tractor won't
>>run right:
>>Fires up in the first 1/100 revolution and purrs like a kitten.
>>
>>:)
>>
>>Terry
>>
>>P.S.
>>
>>Hope this post hits the list before the spring thaw!
>>
>>wb5cys wrote:
>>
>>>What is the physics behind our old treasures being harder to start in
>>>cold weather?
>>>
>>>Is the ignition system affected by the cold?
>>>Is the fuel mixture somehow different?
>>>Is it harder to burn the fuel mixture enclosed by cold iron?
>>>The physical effects of the thickened oils are obvious, but are there
>>>other issues with oils as well?
>>>What about air intake?  Any changes there?  Am I more likely to suck a
>>>glob of oil from the breather into the carb during cold weather?
>>>Aside from the obvious effects from freezing, does the coolant system
>>>behave differently during cold weather?
>>>
>>>My old John Deere tends to wake up pretty well on a cold morning, about
>>>as well as I do, but the definition of cold here in Texas is different
>>>than it is elsewhere.
>>>
>>>Thanks!
>>>
>>>Cal B.
>>>Nacogdoches, Texas
>>>_______________________________________________
>>>Antique-johndeere mailing list
>>>http://www.antique-tractor.com/mailman/listinfo/antique-johndeere
>>>
>>>
>>
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