[C320-list] Perkins Rotation

[Scott Thompson]

My Yanmar is "right hand" (i.e. clockwise) when viewed from the front of 
the engine but the prop shaft is also "right hand" (in forward gear) 
when viewed from astern.  Says so right in the Yanmar manual, too.  So 
the transmission does in fact reverse the direction of rotation (in 
forward gear).  This is a very common setup from what I've seen, and I'm 
not surprised it's what is observed on the Perkins engines.  Do ANY 
320's have left hand props?

Steve Magennis wrote:
> Warren:
> 
> A left hand rotation observed from the front is a right hand rotation
> viewed from the propeller end.  There is no change in the direction of
> rotation in your engine / transmission.  Getr a right hand rotating
> prop.
> 
> Steve
> Alchemist C-320
> 
> --- Warren Updike <wupdike at hotmail.com> wrote:
> 
>> The name plate on my Hurth:
>>   MODEL    HBW 50
>>
>>   RATIO     iA =2.05         iB =1.86
>>
>>   SER. N.    09-73295
>>
>> The manual I have says that the "A" ratio is "Transmission ratio
>> propeller rotation opposite engine rotation."  And, the "B" ration is
>> "Transmission ratio propeller rotation same to a engine rotation." 
>> (Exact quote.)
>>
>> I read the ration as A=2.05:1, to mean that the shaft makes 1 turn to
>> each 2.05 turns of the engine crankshaft.  If the "A" ratio is, in
>> fact, the forward speed, then, indeed the trans does reverse the
>> engine rotation in forward.  Why the reverse, "B" ratio, would be
>> lower than the forward ratio, I can only conjecture.  Certainly, with
>> cars the situation would be reversed, I think.  Perhaps someone with
>> better understanding may enlighten us.
>>
>> Warren & Pattie Updike
>> C320, #62, 1994, "Warr De Mar"
>> Frog Mortar Creek, Middle River
>> Chesapeake Bay
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> 
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