Mailing List lml@lancaironline.net Message #24699
From: Barry Hancock <radialpower@cox.net>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: Re: [LML] Re: Prop pitch with pressure loss
Date: Fri, 06 Aug 2004 13:53:33 -0400
To: <lml@lancaironline.net>

On Aug 6, 2004, at 10:19 AM, DJ Molny wrote:

Aerobatic planes are subject to significant fluctuations in oil pressure
during maneuvers, so their props default to coarse pitch to avoid
overspeeding the engine.  This behavior is purely a function of the prop
design, and is used on both Lycoming and Vedeneyev M-14 engines.

This is correct.  However, what I was getting at is why don't all engines have this failure mode as it does increase glide distance substantially in a loss of power situation.  I don't know about you folks, but I'd rather have max. glide distance and partial power available (fails to high pitch), than reduced glide and full power (fails to low pitch).  YMMV.

B

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