Message-ID: <001501c1b39d$72e60880$d30eb43f@f3g6s4>
Reply-To: "Dan Schaefer" <dfs155@earthlink.net>
Reply-To: lancair.list@olsusa.com
From: "Dan Schaefer" <dfs155@earthlink.net>
To: "Lancair list" <lancair.list@olsusa.com>
Subject: Hartzell Prop Dressing
Date: Tue, 12 Feb 2002 00:15:33 -0800
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To Larry Henney:

I don't often believe blindly in much of the mythology that surrounds this
sport/hobby of ours, but when it comes to the repair of propellers, I gotta
believe that it should be done by someone trained and certificated in the
art.

Of all the bits and pieces on our toys upon which we stake our butts every
time we tuck the wheels in the wells, the prop and it's maintenance may be
the one that shouldn't be treated as "experimental".

I doubt that you would take a file to such highly stressed components as
your crankshaft or a connecting rod. The propeller is probably more highly
stressed than either and just as (or more) intolerant of inept repair.
Particularly when one considers that often, the most egregious damage
sustained by props in service usually occurs in the most highly stressed
regions (the outer 10 - 12 inches is just closer to the gravel).

One of the things that can happen, without specific training in prop
maintenance, is to grind away enough metal to exceed allowable limits and
make the prop unserviceable and unsafe, even though the repair looks really
neat and smooth.

Bottom line - have it done by the best prop shop you can find.

Fly safe.

Dan Schaefer

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