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Date: Thu, 21 Nov 2013 20:01:03 -0500
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From: Kevin Stallard <kevin@arilabs.net>
Subject: RE: [LML] Propeller options for the Legacy?
Thread-Topic: [LML] Propeller options for the Legacy?
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Hey Adam,

If I am not mistaken, if the engine stops producing power, but the propelle=
r is spinning, you'll have plenty of oil pressure.

If the engine seizes, then oil pressure goes away, but other failures I thi=
nk will allow you to change prop pitch.

Kevin

________________________________________
From: Lancair Mailing List [lml@lancaironline.net] On Behalf Of Adam Molny =
[Adam@ValidationPartners.com]
Sent: Thursday, November 21, 2013 5:49 AM
To: lml@lancaironline.net
Subject: [LML] Propeller options for the Legacy?

It=92s looking like I won=92t be able to get a replacement blade for my Aer=
ocomposites prop, which means I=92m in the market for a whole new prop. How=
 do I go about choosing? Which is better, Hartzell or MT? Feathering or non=
-feathering? Are there any other options out there? I=92m even open to gett=
ing a used prop.

Lancair lists their various prop options here<http://www.lancair.com/index.=
php/our-aircraft/legacy/options-rg>. Hartzell typically has a 6-8 week lead=
 time. Not sure about MT.

The MT=92s weight is more in line with my old prop (which was 50lbs). But I=
 have heard reports of MT props slinging oil/grease due to seal problems. T=
he Hartzell is tried and true but much heavier (and it only comes in that b=
oring gray color!).

Feathering vs. non-feathering =96 the standard props we use go to flat pitc=
h if we lose oil pressure. But that=92s only a single type of engine failur=
e. If the engine quits completely for any other reason oil pressure will bl=
eed off. Once that happens moving the prop lever to low pitch won=92t have =
any effect. Do I have that right?

I would greatly appreciate any and all thoughts and discussion on the matte=
r.

Thanks,
Adam Molny