Re: A Simple Auto Engine Conversion

"cavelamb himself" <cavelamb@[EMAIL PROTECTED]
> wrote in message 
news:cPidnflJ9YpY5iLVnZ2dnUVZ_hSdnZ2d@[EMAIL PROTECTED]
> Peter Dohm wrote:
>
>> "Morgans" <jsmorgan@[EMAIL PROTECTED]
> wrote in message 
>> news:g9n8du$nk7$1@[EMAIL PROTECTED]
>>
>>>"Peter Dohm" <lefty133@[EMAIL PROTECTED]
> wrote
>>>
>>>
>>>>The damper, which is indeed a relatively expensive part, is on the
other 
>>>>end of the engine and is intended to eliminate resonance within the 
>>>>engine.  A breif treatise, which probably started as an an internal 
>>>>do***ent at one of the big three auto makers, has been included on
this 
>>>>forum a number of times and is probably in an issue of Contact!
Magazine 
>>>>as well; but I can't find a copy on my current computer.
>>>>
>>>>I could easily be incorrect about the purpose of the springs, but 
>>>>another article from Contact! regarding the development of the BD-5 
>>>>drive train (which I also can not find) does provide some food for 
>>>>thought.
>>>
>>>You are thinking of two different things.
>>>
>>>The thing on the accessory end of the engine is the harmonic balancer, 
>>>and it does indeed dampen resonance in the crankshaft.
>>>
>>>Dampeners also exist that go between the engine and the load, usually 
>>>found in industrial applications, or in marine applications.
>>>-- 
>>>Jim in NC
>>>
>>
>> Very true, I had momentarily forgotten those.  They would require some 
>> mathematical analysis to specify correctly and I believe that Molt
Taylor 
>> may have used something of the sort on the IMP or Mini IMP.  There are 
>> also some so-called "dry fluid couplings" that I sort of understand,
but 
>> not completely.
>>
>> Peter
>
>
> A coupling consisting of a pair of "wavy" plates and a dry fluid (like 
> bird shot) that does the actual connecting.
>
> IIRC, it was adapted from an early automotive "automatic clutch" ??
>
> -- 
>
> Richard
>
I remembered that he used the Flexidyne coupling, essentially a
centrifugal 
clutch, in that little twin engine machine with a single prop; but had 
forgotten what he used in the IMP series.  It centainly would have been a 
valid cure for the BD-5 problems, which occured at or below idle speed, as

well.  Apparently, it is most commonly used for industrial applications of

electric motors and here is a link to a product description: 
http://www.dodge-pt.com/products/pt_components/flexidyne/flexidyne.html

Peter