Re: 049 test stand dont's

Gunner Asch wrote:

> 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



What kind of half-completed glider do you have, Gunner?  My 
half-completed glider is a "Spirit", and I think that's what I'm waiting 
for to move me to complete it. :-)

Jim