REFLECTOR: Slowing down - reduce power; add drag

Bruce Topp bdtopp at comcast.net
Thu Sep 27 21:06:11 CDT 2007


Both..  However, a spinning prop produces more drag than a prop that has
stopped.

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Sid Knox
Sent: Thursday, September 27, 2007 8:23 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Slowing down - reduce power; add drag


----- Original Message ----- 
From: "Scott Baker" <sbakr at comcast.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Thursday, September 27, 2007 5:15 AM
Subject: REFLECTOR: Slowing down - reduce power; add drag


> For aircraft equipped with constant speed or variable pitch propellers,
> changing the propeller setting to High RPM adds drag - and contributes to 
> a
> higher sink rate.
> Conversely, in emergency power off glide situations, changing the 
> propeller
> setting to Low RPM reduces drag - and minimizes sink rate.
> SB

Does this apply to a situation in which the engine is still turning (but 
producing little or no power) or engine not turning?

Sid

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