On Sun, 29 Jun 2008 19:09:06 GMT, Jim Chandler <n427c@[EMAIL PROTECTED]
> wrote:
>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
fiberglass fusalage, plywood covered foam wings, with about a 72"
wingspan. A good friend gave it to me, as Ive always liked gliders,
and he was an engine guy. I bought all the servos, a controller (have
to go check what kind...futaba pwm rings a bell...and we started
building two planes. The idea was the bird he was building was going
to be the tow plane for launching my glider. I even designed a release
mechanism...5 channel radio irrc
Then he grabbed his chest and dropped dead.
I kinda lost interest at that point..and its been hanging up there,
with the wings not yet covered for about 10 yrs now.
I live in the rolling foothills , with great thermals and good slopes,
and many model airplane events are held here, or used to be..the free
flights being one. Its about 105F on average here in the summer, and
wth the wide open spaces, and great thermals..its a natural for
gliders.
someday ill get around to fini****ng it. Id like to. But..Ive got two
motorcycles Ive not ridden for at least 8 yrs, and a 22' sailboat
thats not been in the water for at least that long and the Hobi
16..even longer.....working away from home for weeks at a time...when
i get home...too much to do, not enough free time.
Gunner
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
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