Re: 049 test stand dont's

On Sat, 28 Jun 2008 00:10:36 -0400, "Morgans"
<jsmorgan@[EMAIL PROTECTED]
> wrote:

>
>"Tim Wescott" <tim@[EMAIL PROTECTED]
> wrote
>
>> For a motor stand I'm using a Tatone stand with a piece of 1/8" angle
iron 
>> on which the engine is bolted.
>>
>> Don't do this, unless you want some practical education in resonances.
At 
>> the 'bad frequency' (which was just a bit lower than what the engine 
>> really wanted to do) I could see the cylinder moving through a 1/4"
long 
>> arc.
>
>Another thing you can do, until the engine sizes get really big (big
enough 
>to move a concrete block <g>) is to mount the stand to a piece of 2 X 8 
>(either using the steel between the engine mount and the wood, or not)
and 
>mount the whole thing on a 8 X 8 X 16" concrete block.
>
>The block adds enough mass to purty much guarantee that the resonance
will 
>be too low to matter, and the wood helps even more to dampen out any
small, 
>fast vibrations.
>
>That, plus you don't need to do anything except set your block out in the

>yard, and crank up the engine.
>
>Like I said, until you go with a really big gasser, it ain't goin'
nowhere! 
><G>


Anyone need one..Ive got what appears to be a new in box 12vt model
engine starter.


Gunner, with a half completed glider hanging in the reloading
shop....sigh



at yoyodyne they were all veterans of the psychic wars
 exiled from the eighth dimension where the winds of limbo roar"
              mariposa rand mair theal