[C320-list] Perkins Rotation

[Steve Magennis]

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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