[AT] Thanks!

Stephen Offiler soffiler at gmail.com
Fri Oct 9 06:10:21 PDT 2009


I gotta think that one over but I think we're talking transfer of
momentum  here, which is just mass x velocity (not velocity squared)
so mass takes on far more importance.  Thanks for the reminder guys.

SO


On Fri, Oct 9, 2009 at 8:43 AM, charliehill <charliehill at embarqmail.com> wrote:
> Steve, I'm glad you posted that reply because I can only back up what I'm
> about to say from observation over a career of working around heavy
> equipment.  You can take an 8 lb hammer,  put it on a handle 10 feet long
> and let a gorilla swing it until the cows come home and it will never knock
> the pin out of that D-9 or the boom pin out of a big excavator.  A 16
> pounder with a good man on the other end will knock it out.  I don't
> remember the math or physics nor will I attempt to explain why but that's
> the way it works.  The small hammer will bounce off without transfering the
> mass to the pin.
>
>
> ----- Original Message -----
> From: "Steve Sewell" <sewell at ohio.edu>
> To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
> Sent: Friday, October 09, 2009 8:16 AM
> Subject: Re: [AT] Thanks!
>
>
>>
>>
>> --On Friday, October 09, 2009 7:20 AM -0400 Stephen Offiler
>> <soffiler at gmail.com> wrote:
>>
>>> That would be my solution.  I don't have anything bigger than 8#  and
>>> haven't found anything yet that I'd want it for.  Kinetic energy is
>>> 0.5 x mass x velocity squared.  It's all about the speed, folks.  I
>>> can accelerate the 8# a lot  better than I could  hope to do a 16#.
>>>
>>> Steve O.
>>>
>>  Steve O. : I understand the engineer in you about kinetic energy.  I also
>> know you well enough that we have around the same mass and energy of
>> swing.
>> The former Cat, dealer mechanic in me knows we can swing that 16# sledge.
>> I
>> have the bad back to prove it. )-:
>> A D-9 track master pin won't ever get up enough energy to laugh at an 8 #
>> hammer. But I have taken many out with a 16# with a helper holding the
>> B&O.
>> Of course it that's me twice as many blows as someone twice my size. (-;
>>
>> Note. A B&O is a form of a sledge hammer. Same size handle. Head is around
>> a foot long on each side, around 2" in diameter. About the same size as a
>> track master pin. Called a B&O because it was used to help drive railroad
>> track pins. Set the B&O on the in and drive it with the sledge.
>>
>> -steve
>>
>> Steve Sewell
>> Albany, Ohio USA
>> sewell at ohio.edu
>> sewell at atis.net
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