???????? lml@lancaironline.net ????? #66626
???: Colyn Case <colyncase@earthlink.net>
??: Re: [LML] Propeller for ES
??: Mon, 19 Aug 2013 23:26:33 -0400
??: Lancair Mailing List <lml@lancaironline.net>
Hi Tom,

As others have pointed out:
- the Hartzell scimitar is considered fastest.
- the Hartzell metal prop is heavier.  If you need ballast near the front of the plane, something to consider.  I think that's an issue with the IV's but if memory serves, not the ES's.
- the Hartzell full feathering metal prop is heavier still.
- a composite prop is smoother and lighter.

If it weren't for CG considerations, I would go with a composite prop and as Bob pointed out, the constant speed is nearly as good as full feathering when it comes to glide.
One thing you should make sure you understand is what your prop will do if it loses oil pressure.
A full feathering prop will go to coarse pitch.   Most constant speed props will go to fine pitch.

Colyn


On Aug 18, 2013, at 10:45 AM, Tom Wallace wrote:

It is finally time to purchase the propeller for my ES. I have a IO 550N
engine. I searched the archives and didn't see any thread addressing this but if
I missed it I apologize for the redundancy.
I would appreciate any input on why the Hartzell or MT props for this
combination was chosen or other available props that have been used. Thanks in
advance for your input.

Tom
N726TW
 
Blue Skies,
<image001.jpg>
Tom
 

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